P.O. Box 1086, Victoria Gardens Apts, Weno, Chuuk State (Truk Lagoon), Federated States of Micronesia


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SS THORFINN - Photo Gallery

SS THORFINN description

SS THORFINN basic informations

SS Thorfinn is one of the world’s largest and best equipped dive cruisers having cruised / explored Micronesian waters since 1980. Great space, fine appointments, tasty food, and extensive comforts without pretensions, she is big, rugged, and built for the world’s most challenging oceans. Containing numerous yacht type facilities, she delivers the best staff and value for your vacationing dollar..! For divers wishing the most in high quality uncrowded dive sites per tour, this is your ship to choose located continuously out at wreck sites where diving actions never cease. You asked for it...we deliver..!

Diving awesome Truk Lagoon...unequaled in global wreck dive sites and aquatic life recreating so much life over the ruins of a World War 2 battle support fleet. Waters and air at equal temps ceates so comfortable dive conditions, in relatively clear waters.

Diving continuously on a 24/7/30 basis from moorings within sheltered central wreck anchorages, Thorfinn divers move quickly to adjacent wreck and reef sites by speedy ‘state of art’ 300hp twin engined 32 ft. launches assuring maximum varieties in quality wreck and reef sites at Truk Lagoon. Featuring up to 5 different daily sites, small groups enjoy fine views and penetrations… free of other divers at singly moored locations. By avoiding single site moorings with limited selections, Thorfinn divers enjoy fine views of up to 30 appealing sites during 7 continuous dive days aboard, with experienced guides on every dive, each leading small parties of 4-6 divers safely to the best below.

This system provides the most for every budget, as knowing divers quickly appreciate after sampling differences in cost and product delivered.

Personal facilities and great food are just minutes from each dive site, avoiding long rides to distant shore facilities, or tossing at exposed anchorages aboard lighter dive vessels lacking the size and stability of this 1,100 ton ship.

Safe diving profiles follow long established rules producing one of today’s most admirable dive safety records. Full safety gear aboard launches and ship assist in maintaining this record..

Newly installed high volume oxygen generators produce breathing gas volumes well in excess of all needs for full ship charters to 20 technical or recreational divers. Multiple cylinder sizes and arrangements are filled quickly and accurately at an onboard blending station catering to near every request. A large ship’s staff readily welcome everyone to enjoy the delights fully served from this great ship,… our floating home at a central Pacific Paradise..!

Languages spoken: English

Facilities and services: Nitrox, Nitrox: free, DIN adaptors, Rebreather support, Rental equipment, Tech diving facility, 10 dbl occ guest rooms, Rec/tech equally, A-c throughout, Custom dive launches, Lg oxygen generators and Most dive site choices

Free cancellation if cancellation is made 90 days before depart date, prepayment if any will be returned.

Group discounts: 
5% for 4 or more guests
10% for 6 or more guests
15% for 8 or more guests
20% for 10 or more guests
25% for 15 or more guests
30% for 20 or more guests


SS THORFINN description

SS THORFINN basic informations

Constructive Records:

Batangas, Philippines 2008 – major repairs, internal/external reconstructions

Batangas, Philippines, 2005 – steel replacement / renewal, extensive renovations

Cairns, Australia, 1995/6 – extensive renovations, accommodation upgrades

Vancouver, B.C., 1977 – initial conversion to Utility Charter cruiser

Original Construction, Stord Shipyards, Norway, 1954 – as Ice Class whaler


10 double occupancy rooms for 20 guests.

13 Toilets, 11 Showers, eight in private facility guest rooms.

‘A’ deck with topside upper bridge controls, electronics mast.

‘B’ deck with navigation bridge forward, chartroom/business center, liferafts, emergency beacons, dive launch storage, aft sun deck with lounge chairs and shade canopy.

‘C’ deck Guest Lounge seating 30 persons, bar, DVD and reading library, surround sound CD/player with I-pod connex, 50” LED TV with DVD player, 2 shower rooms, two toilet rooms, hallway storage closets. Guestrooms 9,10,11.

‘C’ deck Spa Area with 11 person spa, 2 camera service/storage tables, adjacent deck chairs.

‘D’ deck forward interior with Dining Room, 5 tables seating 26 persons, adjoining galley and pantry, view windows, bookcase, stairs to crew area.

‘D’ deck aft interior with Boatique (handicrafts, t-shirts, postcards), dive service center, steering flat. Thor’s Lair, a large room with luxury appointments, and Room 3.

‘E’ deck with big ensuite Guest rooms 4,5,6,7,8.


1 x Icom IC-M 700 Med. Freq. SSB radio telephones

1 x Icom IC-M 80 25w VHF radio telephone

1 x Sailor RT 144 25 wVHF radio telephone

3x Standard Horizon 25w VHF radio telephones, 2 located on dive launches

1 x Alden Marinefax IV weather facsimile unit

1 x Kenwood R-2000 multi-band radio receiver

3 x standard Mod. HX 250S hand held portable VHF r/t’s

1 x Trimble Galaxy Sentinel Inmarsat-C Comsat terminal

1 x Inmarsat Sailor Fleet BroadBand 500 Comsat terminal, with Wi-Fi Internet to entire ship

1 x Iridium IOP comsat terminal for auxiliary Broadband backup

Propulsive Machinery:

Main Engine: Fredriksstad Mek 4 cyl. double compound steam – 2,500 h.p. @ 140 rpm

Boilers: 2 x Foster Wheeler D type 18,000 lbs./hr @ 250 psi, 600 deg F superheat)


2 x Yanmar 6HAL-DTN diesels driving Marathon 250 kw 220 VAC 3 phs 60Hz generators

1 x Mitsubishi diesel driving 40 kw 220 VAC 3 phs 60 Hz generator

Ships power supply

boat technical data
Material: Steal
Build: 1954
Renovated: 2008
Lenght: 58 m
Width: 10 m
Draft: 5.5 m
Displacement: 1100 tonnes
Cruising speed: 11 knots
Maximum speed: 16 knots
Range: 17000 km
Freshwater maker: 9500 lt/day
Water capacity: 68000 litter
Fuel capacity: 340 tons

Boat features and services

  • Air conditioned cabins
  • Camera storage
  • Dining room
  • Food & Drinks

  • Buffet style
  • Boat navigation and safety

  • Bilge pump alarm
  • Fire extinguishers
  • Life vests
  • Satellite & mobile phones

  • Equipment rental





    Regulator (sherwood)



    Bcd (mares)



    Fins (mares)



    Mask (oceanic)



    Light (uk c4 led)



    Full set (not inc. light and computer)



    FAQ - Frequently Asked Questions

    Scuba Diving Chuuk (Truk)

    Truk Lagoon is centered within Chuuk State of the Fed States of Micronesia and is famous for its giant oceanic lake surrounded by a huge barrier reef and islands. The lagoon is the final resting place for more than 100 ships, planes and submarines – the legacy of a fierce World War II battle between the Imperial Japanese Fleet and Allied carrier planes. Most of its sunken contents remain in their original form after sinking, and are now ruled as an underwater museum with a total ban on artifact removals.

    The Allied ‘Operation Hailstone’ in February 1944, and two more attacks of April and June ‘44 left the lagoon floor littered with Japanese cargo and armed military ships. Decades later, they have become natural reefs, draped with corals and serving as fish havens, with most wartime artifacts still aboard. They are fascinating sites to visit and many are accessible to any experience levels of divers. Shallower ships have become overgrown reefs hosting species of over 700 fish and nearly 400 corals, plus numerous invertebrates.

    This location is unsurpassed for quantity of dive accessible wreckage in close proximity, situated in shallow clear waters. Many wrecks are visible while snorkeling, and various on-shore ruins can be viewed as relics of the past conflict. .

    Most shipwrecks lie adjacent to the high islands of DubIon, Eten, Fefan and Uman, and represent the largest naval loss in history. Their cargoes of tanks, trucks, airplanes, mines, bombs, machine gun bullets and thousands of other artifacts including beautiful china are there still to be explored.

    The islands of this big atoll are rich with natural beauty, and a 180 mile encircling barrier reef is full of sand spits with overhanging coconut palms. Various mid-lagoon high islands have emerald peaks rising to blue skies.

    A slow paced life in Chuuk often permits time to enjoy its natural features with lush islands as home to beautiful migratory birds, with occasional bird watchers viewing them at higher locations.

    Divers are amazed in viewing preserved shipwrecks still in pristine condition following 70 years of submerging into warm, tropic waters. Truk is undisputedly the world’s finest shipwreck diving destination. Wide assortments of hard and soft corals in brilliant colors delight both day and night divers, and vast selections of in-place artifacts testify to its historic preservation by local authorities.

    Historic items among encroaching jungles include a Japanese lighthouse, perched atop a high island, reached by hiking or driving. Old runways, command centers, gun emplacements, cave networks, hospitals and libraries can be located when utilizing a knowing guide.

    The most suitable method to explore Chuuk is from aboard a liveaboard dive vessel. Often overlooked outer reefs have wide varieties of pelagic and reef fish along cascading coral walls stretching down into a blue abyss below. Windsurfing and sailing are popular during NE tradewind periods from Dec to late April.

    Wreck Diving in Truk Lagoon

    The warm tropical conditions of Truk Lagoon, its sheltering islands and reefs make it one of the most comfortably accessible wreck diving locations in the world.

    This sheltered part of Micronesia has wreck diving suiting all divers, from shallow snorkeling, down to deeper wrecks (still within recreational limits) for more advanced divers. There are minimal currents within the confines of Truk Lagoon and consistent good visibility, making the wreck diving easy and accessible for any diver. Penetrations and dive depths are nominated and customized to the comfort, needs and experience level of individual divers. We offer a range of [link id=40]courses[/link] onboard from open water through to Rescue.

    Plunge in to warm clear waters of Truk and discover the wonder-world of wrecks and treasures hidden below its smooth surface. Aboard Thorfinn you will never be far from any dive site, as the ship’s nearby anchorages provide great flexibility and convenient alongside diving. Running two custom designed fast dive launches along with two smaller craft, Thorfinn provides the most variety and accessibility to all of Truk, diving 30 or more wrecks in just one week aboard.

    It enables smaller groups and caters for specific needs of divers with extra requirements such as technical diving. Truk offers wrecks to suit any level of diver, from newly certified open water divers to more seasoned veterans, as depths are set by the individuals making the dives, yet we do have established guidelines and set safety standards. Some of our Guides, have been diving these wrecks for over 15 year and are the most experienced dive crew in the lagoon. They can hold hands with the newest divers, or permit more experienced divers to explore as they please.

    What are Diving Conditions in Truk Lagoon?

    Diving conditions in Truk Lagoon are comfortably easy, with minimal currents, bath-like water temperature (29-30’C/84-86’F) and very good light. Anytime is ‘best’ time for diving here, as there are no real seasons. NE trade-winds from January to April create a cooling effect with a light sea chop. Rainfall is fairly consistent year round with short sharp showers followed by ample quantities of sun!

    High attractions of wrecked ships, planes, and a submarine, can be supplemented with occasional runs to pristine outer barrier reefs with bright corals, sharks, eagle rays, huge schools of barracudas, big eyed jacks, batfish and a profusion of reef fish! Shark feeding dives are an option at several locations.

    Neighboring island visits and tours are easily arranged as desired, without shipboard fees. Snorkelers or non-divers often accompany divers aboard dive launches, to view activities below, at many shallower dive sites scheduled daily.

    Regular charters run Saturday to Saturday throughout the year, with no person minimums to run a week’s tour, as we operate 52 weeks per year.

    Technical Diving?

    Technical divers have options of employing double banded manifolds with cylinders of 8 or 11 ltr sizes, and up to 15 ltr singles or sidemounts, 3-4 ltr pony bottles, stage cylinders, and special re-breather bottles with free Sofnolime, along with optional Helium that should be advance requested to ensure sufficient on-hand quantities.

    Aboard Thorfinn, you’ll receive rewarding experiences in technical diving with ability to extend diving at many deeper sites. Partial pressure blending via an efficient series of electric and air driven gas boosters produce various mixes of Enriched Air Nitrox and Trimix to meet individual requests.

    Re-breather Diving?

    Thorfinn’s twin oxygen generators produce oxygen at 93% (+/-3%) purity, and along with imported Helium, make Thorfinn, a favored option for both re-breather and technical diving. Sofnolime is supplied freely on the Rebreather Plan. A selection of re-breather cylinders are available suiting most manufactured units, with all cylinders oxygen cleaned and compatible to industry standards.

    Diving Season

    Chuuk is a true year round diving destination at equatorial mid-Pacific, with warm sun often interspersed by short sharp tropic showers, reverting back to warm sunshine. A rainy 10 minutes, one hour, or occasional day, bring an annual average rainfall of 85-95 inches, spread unpredictably year round after long years of recorded measure.


    Daytime temps from 80-90F (30-34C) Night temps about 80F (27C) Slightly drier and cooler during NE trade breezes from December through April. Humidity increases through May to November calms (doldrums). An occasional storm may start from intense ocean evaporations at this ITCZ zone, with a wet humid day gradually intensifying as a system moves westward. There are no predictable Typhoon seasons here.

    Daytime……..85 – 90 ºF/29-32ºC

    Night…………70 – 75 ºF/21-24ºC

    Humidity: 65 – 75%, average

    Water Temperature Year round: 86 – 87ºF/28-30ºC


    December through April…….NE Trade Winds 10 – 15 knots

    May through November…….Light variables


    4 – 6 inches per month, average

    Skill Levels

    All skill levels of certified divers are welcomed, and their limits will be drawn from observing in-water skills as viewed by our professional dive team. Good breathing control and ability to stay within safe boundaries of their chosen dive system will govern access to certain attractions below.

    Travel Documents

    U.S. Citizens only require proof of citizenship which may be one of several items, as a valid passport, Voters registration card, or Notarized copy of birth certificate.

    Other citizens (Non-U.S.) require a valid passport for legal entry, and must obtain a USA Transit Visa to pass through Guam or Hawaii en route to us. On-line ESTA provisos will suit certain nationalities.

    FSM Visitor VISA Forms are issued by airlines and processed by Immigration Clearance without charge. Your copy of this visa must be retained and is usually stapled to your identification for relinquishing on departure.

    Clothing Suggestions:

    Light clothing is suitable in this tropical environment. Shipboard informality dispenses with need for formal items.

    A recommended checklist:


    2 pairs slacks

    Cotton shirts




    Tennis shoes or sandals

    Sun hat


    Toilet Articles


    Suntan lotion

    Skin cream/lip balm

    Beach Towel

    Insect repellent

    Personal medication

    Medical Kit


    Anti-motion tablets

    Sudafed or other decongestant

    Ear Eze (or other ear protection)


    Antibiotics (check with your doctor)

    Sunglasses (spare)

    Flashlight (extra batteries)

    Extra batteries for cameras, etc,

    Female guests are advised to include a mid-length skirt. It will be comfortable for shore visits, especially on traditional outer islands (see Customs and Conduct).


    These waters abound with fine photography options. There are countless opportunities to view bright corals, fish, and shipwrecks in both wide angle and macro formats.

    Bring sufficient memory cards, batteries, power adapters, strobes, and cameras needed along with back-ups.

    A large LED TV monitor with DVD player is in the lounge for instant playback of your video/still footage.

    Diving Equipment

    Dive Computer, BCD, regulator, masks, fins, snorkel, submersible pressure and depth gauges, wet suit (if desired), dive light (extra batteries), and repair kit are the divers’ responsibility, with a limited rental supply of most items aboard.

    Tanks, weights, and weightbelts are provided on the vessel.

    Light wet suits are optional in the 85 deg F (29 C) water, but do provide protection against coral and abrasions on the wrecks.

    It is highly recommended to have critical equipment serviced and checked by a reputable service facility with emphasis on first and second stages of your regulators, hoses and gauges.

    A supply of “O” rings and a check of your B.C. is also recommended. It is most distressing to have people arrive at this distant destination and then lose valuable dive time over malfunctioning equipment.

    A limited rental supply of most gear except suits is available.

    Diving Procedures

    Wreck diving under auspices of expert Trukese guides is conducted by mooring or anchoring our dive launches to wreck sites with divers proceeding up and down anchor or buoy lines. Whether moored or drift diving on reefs and at passes, expert dive guides will assist or lead divers while explaining and showing a site’s key interests.

    Most regular diving is done on a no decompression basis, with mandatory stops at certain ascent points to assist in your safety. Technical divers are welcome to request extended deep or other considerations with Nitrox use. A privately maintained double lock re-compression chamber/facility is available at Chuuk, and dive insurance is mandatory to offset any fees assessed with a treatment.

    The divemaster will oversee and profile each diver to keep track of their daily dive records. We ask everyone to record accurate bottom times and depths on our lounge log board after each dive.

    Night divers should bring suitable dive lights and batteries. Spear fishing is not permitted.

    Truk dive permits and related costs of $50.00 per person will be assessed onboard and is not included in your package.

    Health Precautions

    There are no current official requirements for vaccinations or inoculations, but you may wish to check with your doctor about any specific need.

    Micronesia has very little pest or insect problems for a tropic location, but carry some antidotes for infections from light coral cuts and scratches.

    Ear infections are easily contracted in warm waters and a vial of Ear Eze or equivalent for dropping in each ear at end of daily diving activities is highly recommended.

    Sunburn can represent a great health risk and does require careful attention if you have not been exposed to the sun for some time prior to your trip with us. A good sunblock is essential.

    Guests may consider bringing broadband antibiotics.


    Every effort is made to assure a safe trip, but the purchase of a short-term trip cancellation policy, in case of unexpected changes in your plan is wise.

    Diving Insurance is mandatory for diving onboard the Thorfinn.

    Also recommended is accident, medical, and baggage insurance.

    Customs & Conduct

    In order to preserve warm welcome given to visitors at remote islands of the Pacific, an insight of their customs will be helpful in making the most of your opportunity for cultural interaction.

    Common sense can guide you much of the time but the following is a guide as to what to expect. Pacific islanders by nature are soft-spoken and reserved in their personal manner and it is recommended that a like conduct be displayed in their presence.

    Do not appear unexpectedly in a village or gathering. Have a local person introduce you to the ranking chief and other prominent villagers.

    Exposing the thighs is considered improper for females, therefore, skirts are recommended for shore visits. Onboard dress is casual and unrestricted.

    During shore excursions, the Captain will arrange the formalities of introductions. In keeping with traditions of the island group, visitors may be asked not to walk in a particular part of the island or dive and fish in a particular area adjacent to the island, which we ask all guests to respect.

    Visitors will delight in the warmth of the people and the gentle displays of friendship exhibited by offerings of coconuts and fruits and offers of a walking tour of their island. Please do not pick your own fruits unsolicited, as you may be trespassing. When encountering domestic scenes, ask for permission before taking pictures.

    The people will be most cooperative but it could be found offensive to take pictures or video without first asking. On the other hand, don’t be surprised by people, especially the children, offering to be photographed and it is expected that pictures will be taken during performances by the islanders for their visitors.

    Small tokens left as souvenirs with the people are a big hit such as soap, needles, combs, candies, fishing tackle, etc. and are very much appreciated.

    Enterprising islanders will display handicrafts and shell for exchange or sale.

    You will be delighted by young children whose natural curiosity will overtake their shyness to exchange stories and questions, often punctuated with fits of giggles.

    Micronesians will not show open disapproval if you violate their social codes so we ask our guests to keep in mind this simple guide for the mutual benefit of a cultural exchange.


    The U.S. dollar is the local currency. You can pay your onboard account with US$ cash, US$ travelers checks or credit card (VISA or MasterCard only – there is a 3% fee charged to offset higher merchant fees). Foreign currencies not are accepted as payments or at local banks.


    Two banks operate within the Federated States of Micronesia and provide most regular services, except Foreign Currency Exchange.

    In Truk:

    Bank of Guam

    Bank of FSM


    On Main Islands: Cellular services are GSM 900 system via locally purchased SIM cards (FSM Telecoms currently has no International roaming agreements). Regular telephone services provided by FSM Telecommunications Corporation cover most local and international needs.

    Aboard SS Thorfinn: Mobile Cellular services via FSM Tel when in range. Email and Internet browsing is provided from ship’s Comsat served Wi-Fi via controlled bandwidths. Economic international phone calls via bridge satcom phone are optional.

    Electric Current

    Primary Electric current throughout Micronesia and aboard the Thorfinn is 110 VAC-60 Hz with American type outlets. Auxiliary outlets of 220VAC-60Hz power are additionally provided in seven rooms as well as at central 220V charging points via Australian type outlets. If you are traveling from the UK or Europe we recommend bringing power plug adaptors.

    Airport Transfers to and from Ship

    Arrivals/Departures to and from airport:

    Our office staff and/or crew will greet your arrival at airport and take you to a nearby pier (in our 10 seat van) where a dive boat will be waiting for final transfer to the anchored ship. This trip is repeated in reverse at trip end.

    Arrivals/Departures to and from hotels:

    Guests will be contacted at their hotel by our Office to confirm their transfer arrangements and timings. At the end of their trip guests will be transferred back to the hotel or airport as appropriate.

    Menu on board

    All foods served on board are of wide variety in generous quantity. Our two cooks conduct all baking, and produce a well-received fare. Special dietary requests will be handled to our best ability within range of any supply limitations.


    Domestic water aboard is a product of shipboard desalination equipment. It is of the highest quality and perfectly safe to drink. We do ask guests not to waste water aboard as it is a valuable commodity.


    Limited facilities are available, with a careful view to water consumption and availability.

    The Crew

    The Thorfinn has a full Pacific Island crew complement of twenty, most of whom are Micronesian. Some may have a slight difficulty with English but usually comprehend quickly if spoken to in a measured manner. Their quietly reserved manner is the way of Pacific Island people…. to not appear obtrusive and forward speaking. Our high 20 crew to 20 guest ratio is to maintain the most attentive standard of service possible. Soon after boarding, the ship’s crew will place luggage in your respective rooms while we gather at lounge or spa to proceed with a full orientation on shipboard routines and dive procedures.


    Tipping is not required aboard Thorfinn, but if you would like to reward the crew at trip end for a job well done, it will be graciously accepted. On board policy is for guests to give any contribution to two or three different departments together to avoid any chance of it not being divided evenly as the crew have set up between themselves.

    Is the Thorfinn mobile – or does it anchor centrally?

    Two large 30ft covered RIBs will take divers out from Thorfinn, who will stay at various central anchorage within Truk Lagoon. Thorfinn and her fleet of dive boats provide a broad mobility offering the widest range of diving at Truk, taking small groups of diver to 5 differing daily dive sites adjacent to various anchorages.

    Thirty or more wrecks can be dived during 7 dive days when following carefully selected Saturday-Saturday schedules.

    Thorfinn steams to 2 or 3 differing anchorages with larger groups for closely adjacent dive access. With smaller numbers central anchorages are utilized within 5-10 minutes of most dive sites by fast dive launches.

    How is the weather at Truk Lagoon, and is there a "Best" time of the year to dive?

    Truk’s mid ocean location at 7 degrees North latitude is clear of continental monsoons and most tropical typhoons. Little predictable weather change assures a comfortable year round destination.

    "Best time" is "anytime". Daily temperatures range from 80 – 90° F ( 25 – 31 C ).

    Rainfall averages 4 – 6 inches per month. NE trades bring 10 – 15 knot breezes from December through April, with weak and variable winds (doldrums) for balance of the year.

    What are the diving conditions in Truk, and is a wet suit advisable there?

    Sheltered waters of Truk Lagoon provide one of the world’s most comfortable dive locations with water temperatures of 28-29°C / 83-85°F, no thermoclines or currents and good visibility 40-100ft (12-30m). Underwater light conditions are normally good with a white sand floor reflecting sunlight, assuring good light at most depths for photography and video. Light skin suits are recommended for coral or wreck protection, and light thermal gear is often used after a few dives due to gradual body cooling as the week progresses. Experienced local guides assure added safety and professional assistance to best enjoy each site.

    How many dives and different wrecks can be experienced during a week aboard Thorfinn?

    Five dives are offered each day at short distances from the stable comforts of the large mothership. Thorfinn does not attach itself to the fragile wrecks in the lagoon, avoiding damage from this practice.

    Durable twin engine launches provide uncrowded diving for small groups, at separate dive sites avoiding the heavy silt outs caused by large group repetitive diving. This system provides a broad range of sites, always with the chance of returning to a favorite. Diving commences within 2 hours of daylight arrivals giving an opportunity of diving 30 or more wrecks over a standard 7 dive day week.

    I am an experienced diver and I’d like to know if I’ll get to dive deeper

    We offer a broad spectrum of 30 or more wrecks each week; some deep, many shallower. For divers favoring extended deep diving smaller open launches for 3 or more divers are available. The first dive of the day is to one of the deeper sites, progressing to more shallow throughout the day. If diving with regular single tank divers we would ask you to limit your dive to 60 minutes.

    How is Technical Diving catered to aboard ship?

    We’re accustomed to serving technical divers with either banded double cylinders, up to 15 ltr singles or sidemounts, 3-4 ltr pony bottles, and stages as requested. Special re-breather bottles are available to rebreather users along with free Sofnolime. Twin onboard oxygen generators permit custom gas blending up to 93% (+/-3%) Oxygen content. Optional Tri-mix is available with Helium that should be advance requested to ensure sufficient on-hand quantities.

    When I arrive at Truk, how will I get to the ship?

    Your trip’s ground transportation from airport or hotel to the ship is provided and included in your package. Friendly van drivers greet and transport you to a nearby pier for transfer by waiting dive tender out to the Thorfinn.

    At end of your stay we transfer you back to airport, or to any hotel of your choice.

    Images from dive sites:

    - Photo Gallery

    • Dive depth: 27 - 43m  Visibility: 10 - 30m  Water temperature: 29 - ℃  Dive type: Wreck

    • Dive depth: 15 - 33m  Water temperature: 29 - ℃

    • Dive depth: 27 - 43m  Visibility: 10 - 30m  Water temperature: 29 - ℃  Dive type: Wreck

    • Dive depth: 28 - 47m  Visibility: 10 - 30m  Water temperature: 29 - ℃  Dive type: Wreck

    • Dive depth: 60 - 65m  Visibility: 10 - 30m  Water temperature: 29 - ℃  Dive type: Wreck

    • Dive depth: 3 - 27m  Visibility: 10 - 10m  Water temperature: 29 - ℃  Dive type: Wreck

    • Dive depth: 7 - 14m  Visibility: 10 - 30m  Water temperature: 29 - ℃  Dive type: Wreck

    • Dive depth: 21 - 43m  Visibility: 10 - 30m  Water temperature: 29 - ℃  Dive type: Wreck

    • Dive depth: 9 - 30m  Visibility: 5 - 15m  Water temperature: 29 - ℃  Dive type: Wreck

    • Dive depth: 18 - 40m  Visibility: 10 - 30m  Water temperature: 29 - ℃  Dive type: Wreck

    • Dive depth: 20 - 50m  Visibility: 10 - 30m  Water temperature: 29 - ℃  Dive type: Wreck

    • Dive depth: 37 - 58m  Visibility: 10 - 30m  Water temperature: 29 - ℃  Dive type: Wreck

    • Dive depth: 9 - 30m  Visibility: 10 - 30m  Water temperature: 29 - ℃  Dive type: Wreck

    • Dive depth: 9 - 37m  Visibility: 10 - 30m  Water temperature: 29 - ℃  Dive type: Wreck

    • Dive depth: 12 - 30m  Visibility: 10 - 30m  Water temperature: 29 - ℃  Dive type: Wreck

    • Dive depth: 9 - 30m  Visibility: 10 - 30m  Water temperature: 29 - ℃  Dive type: Wreck

    • Dive depth: 30 - 58m  Visibility: 10 - >30m  Water temperature: 29 - ℃  Dive type: Wreck

    • Dive depth: 9 - 28m  Visibility: 10 - 30m  Water temperature: 29 - ℃  Dive type: Wreck

    • Dive depth: 40 - 64m  Water temperature: 29 - ℃

    • Dive depth: 9 - 38m  Visibility: 10 - 30m  Water temperature: 29 - ℃  Dive type: Wreck

    • Dive depth: 18 - 18m  Visibility: 10 - 30m  Water temperature: 29 - ℃  Dive type: Wreck

    • Dive depth: 40 - 64m  Visibility: 10 - 30m  Water temperature: 29 - ℃  Dive type: Wreck

    • Dive depth: 14 - 15m  Visibility: 10 - 30m  Water temperature: 29 - ℃  Dive type: Wreck

    Dive sites

    Emily Flyboat dive site

    Emily Flyboat

    Emily Flyboat

    Emily Flyboat

    Beginner divers
    Dive depth: 14 - 15m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    Emily Flying Boat was an Allied code name for the Kawanishi H8K1 Flying Boat. Emily Flying Boat came into view about mid-term of WW 2, and immediately proved a capable and deadly war tool for the Imperial Japanese Navy.

    It’s featured long range, greater than even a US B-29 Superfortress was impressive along with its able combat survivability. “The Flying Porcupine” was extremely difficult to shoot down, as being the only Japanese aircraft to employ self-sealing fuel tanks, internal fire extinguishers, and armored cockpit. It was armed with 5 sets of 20mm cannon, and 4 sets of paired 50cal. machine guns all handled by a 16 man crew. In a first test action two ‘Emily’s’ flew from Chuuk via Marshall Islands to high level bomb Oahu’s Pearl Harbor. Only a complete cloud cover prevented their accurately bombing intended targets below. After discharging, they flew back westward, landing in mid ocean to refuel from their submarine ’I-169’ while continuing back to Chuuk unscathed.

    The short combat history of the ‘Emily’ is fascinating. In another incident, Commanding Officer of the Fourth Fleet, his Chief of Staff and other senior Japanese Naval Officers were dispatched on a single Emily to Rabaul to survey a bevy of war damaged cargo ships for possible repair at Chuuk. The ships were being repeatedly bombed and strafed by US aircraft from recently conquered Guadalcanal. The US in reading their codes dispatched nine P-38 fighters to intercept and destroy the Emily and its VIP personnel during its vulnerable take-off from Rabaul. They descended with vengeance from 11,000 ft in ambush using their 20 mm nose cannons to kill the co-pilot and injure the pilot. Reacting quickly, the Emily crew shot down 3 attackers in passing, while the injured pilot turned his big craft after the attackers coming out of their dive, shooting down 2 more and damaging another. The Emily’s pilot pulled up into a high speed climb toward clouds above losing the attackers, managing to navigate his damaged craft back to Chuuk, where a water landing broke it in three pieces on impacting the surface. All personnel survived except the dead co-pilot. The pilot was awarded for his bravery and skills.

    Today, 3 sections of the giant aircraft lie in 50 fsw on the lagoon floor at site of its sinking near Tonoas (Dublon) Island seaplane base, remaining a symbolic tribute to its builder’s designs and constructive skills.

    Kawanishi H8K1 Flying Boat: Crew 16
    Wingspan:124 ft 8 in.
    Length: 92 ft 3.5 in.
    Height: 30 ft
    MATOW:68,343 lbs.
    Engines: 4 -Mitsubishi Kasei 12; 1850 HP each
    Speed: 474 kph
    Ceiling 28,880 ft
    Range 4500 NM.
    Armament: 3 x 7.7mm machine guns, 5 x 20mm cannon, bombs or torpedoes.

    I-169 Shinohara Submarine dive site

    I-169 Shinohara Submarine

    I-169 Shinohara Submarine

    I-169 Shinohara Submarine

    Experienced/advance divers
    Dive depth: 27 - 43m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The I-169 Shinohara Submarine was a KD 6 A (I-168) Class submarine built for the Imperial Japanese Navy and launched 15 FEB 1934. She was built by Mitsubishi of Kobe and was renamed for her last Commanding Officer LCDR Shinohara, the only survivor of her ill fated crew.

    During the war the I-169 Shinohara Submarine participated in the attack on Pearl Harbor, actually penetrating into the harbor confines to launch five mini-subs that went on to sink two of the seven US battleships with their torpedoes as later viewed in aerial fotos from Kate dive bombers overhead. Unable to recover her mini subs she attempted to exit the harbour but became tangled in the entrance torpedo nets due a hurried attempt get away. For 1.5 days she languished trying to free herself while remaining undiscovered. In a final attempt before surfacing to surrender, due lack of air within, and weakened batteries, she made one final thrust breaking clear to finally escape. Her huge size was not suited for attack purposes, but was useful as an underwater transport. She was the sub positioned off Midway to replenish the two Emily Fling boats after their daring bomb raid against Pearl Harbour early 1943. Long range and size saw her serving Truk with limited quantities after the fall of Saipan and Guam. She was only one of a very few able to do so.

    Upon one of these supply runs well after ‘Hailstone’ she was anchored at Truk with senior officers ashore for an evening enjoying local ’hospitality’ when juniors aboard received word of a false US air raid and to dive to floor for protection. In their rush to dive they overlooked closing of control room ventilators, and were quickly flooded out once submerged. The sub landed on bottom and after taking stock of their plight a crew member was air-locked out to the surface to report the situation.

    Divers immediately attended, and on following day with help from 3 derrick barges and salvage tug IJN Futagami, lifting of the sunken craft began with a crew inside signalling from inside by knocking on the hull. The sub lifted easily to the surface being only slightly negative buoyancy in its dive, but when the big water-filled conning tower broke the surface, a sudden massive weight was added in trying to lift it far enough up to open the deck escape hatches. With just a portion of the conning tower clear the cables parted and down she plunged stern first back to bottom after the 3rd day. Diving back down there were no more sounds from within, so orders were given to destroy it to avoid any US recovery.

    Satchel charges were laid over forward torpedo room, and around conning tower, with resultant destruction of approx. 100ft of the bow, and complete destruction of its conning tower.

    The wreck was rediscovered in 1973 with Al Giddings making a documentary about the sub as ‘The Silent Warrior’ with the Japanese government’s subsequent recovery of a portion of the crew’s remains. Sadly, a Japanese diver was also lost during the recovery attempt. She now lies in 135 fsw.

    Displacement: 2440 tons submerged
    Length: 344 feet
    Beam: 27 feet
    Engine: 2-9000 shp diesel and 2-1800 shp electric motors, 2 shafts
    Max Range 14,000 NM
    Mission: Transport
    Armament: 6-21 inch torpedo tubes (14 torpedoes); 1-10 CM anti-surface gun ; machine gun; Crew: 70.

    Fujisan Maru dive site

    Fujisan Maru

    Fujisan Maru

    Fujisan Maru

    Experienced/advance divers
    Dive depth: 60 - 65m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The Fujisan Maru was built in 1931 by the Harima Dockyard as an oil tanker for the Iino-Kaiun Line. Her peacetime duties consisted of carrying crude oil from the US to Japan.

    The Japanese Navy took control of her in late 1941 to utilize as a “Fleet Oiler.” She participated as part of the Aleutian diversionary task group at time of Pearl Hbr attack, the Battle of Midway, and due her fast speed, was part of the “Tokyo Express.” Fujisan carried a deck cargo of 1900 troops in a desperate attempt to reinforce New Guinea. A B-17 managed to hit her with a bomb in December 1943, but she was back in service by early 1944.

    During the “Hailstone” attack, Fujisan Maru was one of just a few vessels underway, trying to escape after discharging her oil cargo. On first day she tried escaping out North Pass but turned back in view of major actions there. Anchoring overnight by Moen Island’s South Field, she was again under attack at daylight while raising her anchor. Before anchor was fully raised her captain ordered Full speed to avoid the bombs running at flank with anchor dragging and bouncing along bottom, up the southeast side of Moen Is. when hit by a near miss bomb off her port aft quarter. Proximity explosions do more damage than any other, and this blast pushed in the entire port side of engine room, then sucked it back out in the recoil. She immediately filled aft with stern going down to bottom at 210 ft leaving bow pointing skyward at about 60deg angle. Slowly through balance of that day the bows gradually dropped until next morning nothing remained except quantities of fuel leaking to surface.

    It is a great wreck site sitting near upright with bridge house intact forward and engine enunciator (telegraph) still showing Full Speed ahead. The quarters are virtually untouched except by time, and lots of surrounding life outside. A large long round object protrudes from port side of engine room angled up with end about 20 ft off bottom. It has size and appearance of a mast, but a close look reveals it is solid steel, and actually the 24inch diameter tailshaft broken away from main engine and pulled out within countering suction of the explosion’s reversal. An amazing sight once understood. Her large diesel exhaust funnel stands erect atop the aft house.

    The Fujisan Maru was found by two Continental Micronesia pilots, who noticed her oil slick, on a flight into Truk in 1976. She now lies in 210 fsw.

    Fujisan Maru
    Displacement: 9,524 tons
    Length: 512 feet
    Beam: 61 feet
    Engine: 1 diesel
    Max Speed: 18.79 kts.
    Launched: 31 MAY 1931. Crew: 48.

    Fumizuki Destroyer dive site

    Fumizuki Destroyer

    Fumizuki Destroyer

    Fumizuki Destroyer

    Experienced/advance divers
    Dive depth: 27 - 43m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The IJN Fumizuki Destroyer was a Mutsuki Class destroyer built for the Imperial Japanese Navy and launched 16 FEB 1926. She was built by Fujinagata Zosen of Osaka and was nearly obsolete when sunk. The ship’s name means “Month of Rice Ears” in Japanese.

    During the war the IJN Fumizuki Destroyer participated as part of the famed “Tokyo Express” to relieve Japanese forces engaged in the battle for Guadalcanal. Throughout the conflict she was repeatedly damaged in various aircraft attacks. Finally after being severely hit by B-24 bombers while at Rabaul, she was sent to Truk for repairs.

    During the “Hailstone” attack, Fumizuki was pulled over and put alongside the hospital ship Hikawa Maru to avoid attack until her engine crew could raise steam and reassemble one turbine for single screw propulsion. Throughout the first day the aircraft were buzzing the Hospital ship to get rid of her consort or risk damages. Finally, by near end of daylight she cut loose and proceeded at about 15 knots speed to the west with hopes of escape through a west pass opposite to the NE direction of the attackers. Nearly safe, she was spotted by last torpedo bomber to fly that afternoon when spotting her wake, gave chase and put a torpedo directly under her stern, uplifting her counter, killing all engine room staff, and leaving her on end with bow high in the sky to slowly drop straight downward before the tearful eyes of her survivors in the water. Her gunnery office related these tales to us as to how sad they all felt after so much work to save their beloved ship. She now lies with a port side list but mostly upright. On earliest viewings of her after receiving details of her position, she was beautifully preserved with a full bridge in place and two rakish funnels along with all deck gear and guns visible. Unfortunately some vandals blew her bridge away to remove a big security safe under the bridge floors, and later anchor moorings from certain dive vessels tore away both funnels, and later her bow has been separated from attaching to fragile structures. She is however still a great site, with large volumes of colorful corals and fish on her remains.

    Displacement: 1913 tons
    Length: 330 feet
    Beam: 30 feet
    Engine: 4 Kanpon Boilers on 2 Parsons geared turbines, 2 shafts
    Max Speed: 37.5 kts.
    Mission: Antisubmarine/Transport.
    Armament: 2-4.7″ .50 cal dual purpose guns; 10-25 MM anti-aircraft guns; 6-24″

    Nippo Maru dive site

    Nippo Maru

    Nippo Maru

    Nippo Maru

    Experienced/advance divers
    Dive depth: 28 - 47m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The Nippo Maru is always a great dive due to its relatively shallow depth providing plenty of coral growth, its proximity to the main islands providing pelagic action and the huge amount of war memorabilia and ship remains including tanks, trucks and stacks of guns and ammunition.

    So this morning, after some preparation, we made the 10 minute boat journey to the Fourth Fleet Anchorage to find that a mild current was running from the north.

    Having previously not met much current in the lagoon, I first thought of the annoyances that such processes bring, however, after descending onto this phenomenal dive site, such things were completely forgotten.

    The divers were first guiding towards the fore ship which holds the trucks hanging over the port beam and light tank on deck, and were again intoxicated by the fish life the lagoon has to offer. The usually schools of game fish were present amongst the high masts rising up to shallow water, and with tuna circling the bow, playing in the current, we knew this dive was going to be a good one!

    A quick look in hold #1 revealed mines and shell casings and moving aft onto the machine gun we could see towards the stern, two large sized grey reef sharks being followed by schools of jacks.

    As they circled above us on top of the bridge, the larger one made several close passes allowing us to get some fantastically close photos. Still surrounded by life we made a final stop to see the artillery guns on the aft deck and made our ascent along this spectacular mast.

    Usually eagle rays are seen on the bow but with the current running, we saw them hovering behind the stern, capping off one of the best dives of the trip so far.

    Sankisan Maru dive site

    Sankisan Maru

    Sankisan Maru

    Sankisan Maru

    Beginner divers
    Dive depth: 3 - 27m
    Visibility: 10 - 10m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The Sankisan Maru in Truk Lagoon is one of the finest coral and artifact sites. This small to medium sized freighter with brimming holds of ordinance and ammunition, was originally anchored close off Uman Island’s west shores, cowering close to other larger empty ships drawing the American’s main concentration of bombs and torpedos. Her Captain wisely gathered his crew to shore, abandoning their floating bomb, to permit fighting for the Emperor another day.

    No American flyers reported attacking this ship, but someone strafed her, after dropping their cargoes elsewhere. A fire aft set off monstrous explosions that ripped entire aftship away from its forepart. Huge metal sections lie strewn to the sides of a 500 ft diameter crater.

    The stern frame sits upright at crater bottom of 160 ft supported by two propeller blades, rudder, and severed shaft. The foreship remains nearly intact, draped in magnificent shrouds of hard and soft corals with every hue of tiny fish swimming in and out. One forward hold is nearly half filled with machine gun and rifle shells originally securely boxed, but today divers have pried most crates open, leaving a huge array of lethal materials spread loosely throughout.

    It is recommended to avoid touching loaded shells due to highly unstable compositions today. Four truck frames, aircraft engines, and propellers are found in balance of holds, and a jumbo mast running up to surface is festooned with some of the world’s prettiest coraline structures.

    An easy, mostly open Truk Lagoon dive, this wreck suits everyone’s tastes with its many attractions and accessibility.

    We’d love to have you come see the wonders of “Shipwreck City.”

    Find out more about the Sankisan Maru and our other famous wreck dives in Truk Lagoon.

    Yamagiri Maru dive site

    Yamagiri Maru

    Yamagiri Maru

    Yamagiri Maru

    Experienced/advance divers
    Dive depth: 15 - 33m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The Yamagiri Maru was built in 1938 by Mitsubishi Heavy Industries as a passenger/cargo carrier for the Yamashita Kisen Line. Requisitioned by the Japanese Navy in September 1941 she was converted to a military transport for moving special cargoes.

    The ship saw service transporting war material between Solomons and the Caroline Islands until she was hit with two torpedoes from the USS Drum in 1943. The repair of this damage can still be seen on the port side of hold number two. She was one of 4 ships anchored at Rabaul along with Seiko, Kiyosumi, and Amagisan, that were being bombed/strafed by planes from Guadalcanal. Later after approval for repairs at Chuuk, they left with a two destroyer escort, but were badly damaged by torpedoes from two US subs in the famous ‘slot’. They all managed to continue, but were in need of massive repairs on arrival at Chuuk, only to be later sunk during ‘Operation Hailstone.’

    Some of the Yamagiri Maru’s high interests are in #5 hold with numbers of large 16-18 inch armor piercing shells carried for the fleet’s leading battleships. These were the world’s largest naval guns surpassing even the 16 inch guns of famous USS Missouri. Each shell weighs 3219 lbs from guns with a range of 36-40 miles. The Yamagiri Maru was sunk by dive bombers from the carriers USS Yorktown and Bunker Hill. They reported several hits and left a huge hole portside amidships that took her down quickly, killing most of her crew. One unfortunate engineer’s skull and body were driven by the blasts into a storeroom’s screens and is regularly viewed today when passing through that section. She now lies in 110 fsw.

    Displacement: 6,439 tons
    Length: 436.4 feet
    Beam: 58.3 feet
    Engine: 1 MAN diesel
    Max Speed: 17 kts
    Launched: 3 MAY 1939.

    IJN Futagami Tug dive site

    IJN Futagami Tug

    IJN Futagami Tug

    IJN Futagami Tug

    Beginner divers
    Dive depth: 9 - 30m
    Visibility: 5 - 15m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The IJN Futagami was a Hashima Fleet Class salvage tug built for the Imperial Japanese Navy and launched 1939. She was built by Harima Sanbashi Company of Aioi. The vessel was equipped with two 2-ton and one 5-ton salvage derricks. She was fitted with de-watering salvage pumps and many hoses still stored in aft hold.

    The tug’s official designation was “Kyunan-sen ken Eisen”. She was instrumental in performing many salvage and towage tasks in and around Chuuk, Some of the more noteworthy was towing in the damaged Sutsuki running astern from the Coral Sea engagement, towing in the torpedoed and burning Hoyo Maru from outside North Pass, and tending to derricks attempting salvage of sunken ‘I-169’ sub. She was frequently at work with barges, towing damaged ships, and tending to many normal duties within the lagoon. Twin sets of anti-aircraft machine guns were mounted in aft corner tubs of her bridge house. She was a unique and powerful vessel of her day with twin six cylinder Unaflow enclosed reciprocating steam engines of 3,000hp, with steam supplied from two coal or oil fired water tube boilers. A large internal towing winch and hydraulic tow hook completed much of her tow gear. Large 6”diam manila hawsers are stowed forward in way of foc’sle crew bunks. .

    The Futagami was undamaged during hostilities, surviving the war, to be left anchored but unattended in channel west of Dublon. Little information is known of her eventual sinking, whether by vandals or inattentions. It could have been easily salvaged but as with many other ships here, few if any came back to the surface. The wreck starts in shallow 30ft water at the stern and descends to 100 fsw at the bow, and is lying at about a 45 deg list to port. Many interesting artifacts are found aboard including an undamaged engine room with great photo opportunities of gauges, valves, and controls.

    Visibility in the channel is often limited to about 20-30 ft and then good at other times.

    Displacement: 625 tons
    Length: 131 feet
    Beam 32 feet
    Engine: 2 coal/heavy oil fired reciprocating engines, 2 shafts
    Max Speed: 14.5 kts.
    Mission: Salvage. Armament
    2-25 MM anti-aircraft guns; depth charges. Crew: 59. Launched: 1939.

    Seiko Maru dive site

    Seiko Maru

    Seiko Maru

    Seiko Maru

    Experienced/advance divers
    Dive depth: 20 - 50m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The SS Seiko Maru was launched July 17, 1940 for original owners, Dairen Steamship Co. as a modern cargo vessel of a then unique design with engines aft rather than amidships. This design offered increased cargo hold space eliminating a space robbing propeller shaft tunnel and a need for extended shaft and bearings. Resembling an oil tanker layout, it was reported as a tanker loss by US aircraft pilots during the attack of Feb 1944.

    The Seiko had been requisitioned by the Imperial Japanese Navy for its design advantages along with heavy cargo lifting gear for use throughout their Pacific campaign. She was accompanied by 3 other partially damaged ships on a voyage from Rabaul PNG to Truk, for expected repairs when intercepted in the Solomon Island’s ‘slot’ by two patrolling USN subs that fired nearly all of their torpedoes into these vessels. Each ship managed to survive and progress on to Truk with gaping holes in flooded cargo spaces temporarily eliminating further use as freight carriers.

    The Seiko was repaired and positioned at Truk’s 4th Fleet Anchorage awaiting service when her luck finally ran out during the February attack with an aerial torpedo into her portside boiler room, taking her quickly down by the stern.

    Lying with a slight list to starboard, she is an impressive intermediate depth wreck site accessible to most divers at depths between 20 – 50m.

    Sutsuki - Patrol Boat No. 34 dive site

    Sutsuki - Patrol Boat No. 34

    Sutsuki - Patrol Boat No. 34

    Sutsuki - Patrol Boat No. 34

    Beginner divers
    Dive depth: 7 - 14m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    IJN Sutsuk, later Patrol Boat N0. 34 was a Momi Class destroyer built for the Imperial Japanese Navy in the early 1920’s. Originally one of the fastest ships of their period, they were top heavy at high speed, and could only be used as second class destroyers or torpedo boats. Although nearly obsolete at the start of the war, the Imperial Japanese Navy decided their speed would be useful in reinforcing their forces at Guadalcanal. Several of the vessels were converted to carry Daihatsu landing craft on the stern.

    During the war Sutsuki participated as part of the famed “Tokyo Express” to relieve Japanese forces engaged in the battle for Guadalcanal. During this period she was heavily damaged in collision with another destroyer while laying protective smoke around their aircraft carrier line. While losing 80ft of her bow, her able skipper backed his vessel out of the war zone, running astern halfway to Chuuk, before a tug arrived to tow her in and receive temporary plating repairs to facilitate her running back to Japan in convoy to receive a new section. However while awaiting a convoy, she was pressed into temporary service patrolling Chuuk’s outer perimeters for US subs and re-supplying outer reef island garrisons via her Daihatsu landing crafts. She was to later continue in that capacity and renamed as Patrol No. 34.

    During Ops Hailstone, several US planes reported damage from brisk anti-aircraft fire when passing over the Fefan /Tonoas Channel and was verified to be arising from the anchored Sutsuki, near Tonoas’s west shores.

    A bevy of US aircraft joined to remove the menace and she went down very quickly under their intense attack, as reported later by a Wing Commander of USS Bunker Hill’s torpedo squadron while diving from Thorfinn.

    IJN SUTSUKI, later PATROL No.34, details:

    Displacement: 935 tons
    Length: 280 feet
    Beam: 26 feet
    Engine: 2 turbines, 2 shafts
    Max Speed: 35 kts.
    Mission: Transport. Crew: 110.

    Hoki Maru dive site

    Hoki Maru

    Hoki Maru

    Hoki Maru

    Experienced/advance divers
    Dive depth: 21 - 43m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The Hoki Maru is another wreck sitting upright in the Fourth Fleet Anchorage loaded with cargo. At the time of the Hoki MaruUS attacks she was carrying a large amount of aviation fuel in the forward holds which caused a huge explosion now leaving only remains of the forward part of this ex-New Zealand ship.

    On this glassy morning we therefore decided to focus on the aft end of the wreck and after the short boat ride, we tied up to the mooring buoy and descended onto the mid-ship area. We first made our way to the stern and to the two large propellers and rudder which are at 160ft/50m.

    I had already briefed the divers to keep an eye out for sharks and as we approached the sand we were welcomed by two medium sized grey reef sharks and a large black-tip reef shark who seemed very interested in one of our divers who was using a re-breather. They made several extremely close passes and continued their search for breakfast, meaning we could move on and inspect the area more closely.

    After a good look around the props and rudder which is over 5m in height, we made our way round to the port hull and entered holds 1&2 through the large torpedo hole. With two levels of construction equipment such John Deere bulldozers, and Japanese trucks, steam rollers and tractors the remainder of the dive was taken up with photos and exploration.

    It is amazing to think that this machinery has been down there so long but is still in such fantastic condition and seems still good enough o be put into action!

    Once the divers were on 70bar/1000psi we left the holds and made our way back to the line where we were greeted by a large school of jacks circling in the current, and we ascended to our first stop at 60ft/18m.

    From there until our 15ft/5m safety stops, a school of batfish came up and brought us great entertainment for the remaining decompression time.

    Once everyone was back onto our dive tender Downrider 2, it was back to the Thorfinn for coffee and cookies fresh from the oven.

    Unkai Maru dive site

    Unkai Maru

    Unkai Maru

    Unkai Maru

    Experienced/advance divers
    Dive depth: 18 - 40m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The Unkai Maru was built in 1905 by the W. Grey Shipyard of England as the freighter S/S Venus. The ship was sold in 1911 to the Japanese Nakamura Kisen Line and later requisitioned for use by the Japanese Navy as a general cargo transport.

    Unkai Maru survived several of the “Hailstone” raids before being sunk. She was struck by an aerial torpedo from planes of the USS Bunker Hill and later by bombs from aircraft launched from the USS Yorktown. The fires and flooding finally put her on the bottom.

    Interesting objects are a prominent bow gun, boxes of huge foot sandals that must have been suited only to a Sumu wrestler team, great numbers of glass fish, and a most accessibly interesting engine room. At one time earlier she had boxes of San Francisco newspapers dated in 1941 prior to the Pearl Harbor event. They displayed Hitler’s advances into Poland.

    The Unkai Maru is one of the oldest ships in the lagoon and was found by Klaus Lindemann in 1980. She now rests upright at a maximum depth of 140 fsw.

    Displacement: 3,188 tons
    Length: 305 feet
    Beam: 44 feet
    Engine:1 reciprocal steam / coal
    Max Speed: 12 kts.
    Launched: 1905.

    Amagisan Maru dive site

    Amagisan Maru

    Amagisan Maru

    Amagisan Maru

    Experienced/advance divers
    Dive depth: 30 - 58m
    Visibility: 10 - >30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The Amagisan Maru was originally built as a cargo/passenger ship serving the Japan-New York Line. The Japanese Navy took her over in 1943 for use as a special transport.

    In February 1942, she was torpedoed by the USS Swordfish near Davao sustaining damages she went over to repair at Rabaul. She was later one of the four ships escorted to Truk for repairs along with Seiko, Kyosumi, and Yamagiri. During the Truk attack she was sunk by an aerial torpedo while carrying aviation fuel and diesel oil drums in her holds. Some of this fuel still leaks to the surface from time to time.

    The ship is one of the largest wrecks in the lagoon. Her most interesting features include a photogenic bow gun, torpedo holes and “staff cars” in hold No. 2, a tank truck on the sea floor, mine sweeping paravanes on deck, and a matching stern gun deep at stern. The Amagisan Maru was discovered in 1973 and now rests at a maximum depth of 190 fsw at her stern.

    Amagisan Maru:
    Displacement: 7,621 tons;
    Length: 450 feet;
    Beam: 69 feet;
    Engine: 1 diesel;
    Max Speed: 18.8 kts. Launched: 6 NOV 1933. Crew: 48.

    Kiyozumi Maru dive site

    Kiyozumi Maru

    Kiyozumi Maru

    Kiyozumi Maru

    Beginner divers
    Dive depth: 12 - 30m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The Kiyozumi Maru was built in 1934 by the Kawasaki Dockyard as a freighter with luxurious passenger accommodations. The Japanese Navy took control in November 1941 converting the Kiyozumi Maru to an armed merchant raider. Six inch guns, cannibalized from old cruisers, two twin torpedo launchers and various anti-aircraft machine guns were added. Her success as a raider was uneventful, so in October of 1943 she was reclassified as a transport. Kiyozumi Maru’s most noteworthy mission was as a troop carrier for invasion forces during the Battle of Midway.

    During the war she was repeatedly damaged by aircraft bombs and left with her escort from Rabaul to Truk for hopeful repair when struck by three torpedoes from two American submarine in 1943. She was towed to Truk and was undergoing repairs at time of the “Hailstone” attack. Although having extensive damage from the submarine attack, it was aerial bombs in her mid-ship superstructure and abeam Hold #2 that finally took her down to lay on portside at 100 fsw.

    Her huge engine is easily viewed through bomb hole atop the house, but divers are advised not to swim under an engine weighing at least 200 tons as it will definitely come down off its most irregular prch one day in the future. Most armaments were removed after arrival at Truk for use by others. The aft torpedo man’s hut is still in view along with the launchers. Remains of a bicycle is viewed in hold below.

    Tonnage: 6,983 ts
    Length: 137.16 m ( 450 ft)
    Breadth: 18.59 m( 61 ft)
    Depth: 12.19 m ( 40 ft)
    Draught: 8.30 m( 27 ft)
    Engine: 1 x Sulzer Diesel
    Horsepower: 8,375 hp
    Speed: 18.73 knots maximum;15.00 knots service
    Launching: 30 June 1934
    Service: 05 October 1934
    Builder:Kawasaki Dockyard
    Owner: N/A
    Service: 05 October 1934
    Builder:Kawasaki Dockyard
    Owner: N/A

    Gosei Maru dive site

    Gosei Maru

    Gosei Maru

    Gosei Maru

    Beginner divers
    Dive depth: 9 - 30m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The Gosei Maru was built in 1937, by the Tsuromi Iron Works Dockyard as a medium coastal freighter for the Koun Kisen Line. Her lines are unconventional, but were adopted as the Standard D Freighter, built in quantity during the war.

    The Japanese Navy took control and utilized her as a supply ship for Sixth Fleet submarines. She carried torpedoes and depth charges. In 1976 many of the torpedo bodies were destroyed to reduce the chance of unpredictable explosions and danger to divers.

    During the “Hailstone” attack, Gosei Maru was attacked by aircraft from the light carrier Monterey and sunk by a torpedo. She now lies on a slope with her stern at 8 fsw and her bow in 100 fsw.

    Gosei Maru
    Displacement: 1,931 tons
    Length: 270 feet
    Beam: 40 feet
    Engine: 1 reciprocal steam / coal
    Max Speed: 12.7 kts.

    Rio de Janeiro Maru dive site

    Rio de Janeiro Maru

    Rio de Janeiro Maru

    Rio de Janeiro Maru

    Beginner divers
    Dive depth: 9 - 30m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    This extremely large wreck sits on its starboard side in shallow water meaning coral growth is heavy on the port beam and marine life is plentiful. With the largest bow and stern guns on offer in Truk, the Rio De Janeiro was the after lunch dive on this particularly beautiful afternoon on the lagoon.
    As always, the journey over to Uman island was a little wet with the wind in our faces but being close to the island, upon arrival conditions were good. We geared up, cameras ready to go and with lights fully charged the target was the engine room of this huge ex-passenger/cargo liner.

    Usually 30 minutes is needed to fully explore this monstrous diesel engine room, powering twin screws with over 7,500 horsepower each, but with only 3 divers, penetration was made easier and after 25 minutes of weaving through the devastation, we were out and on our way to the stern and the propellers.
    The holds of the Rio contain items such as artillery and china, but it is hard to overlook the infinite supply of Saki and wine that the Japanese military seemed to hold. After the holds we were heading for the stern and there it was, the 16ft/5m long stern gun mounted high, and covered in corals and sponges.

    Further on we made our way to housing covering the stern and below the telegraph that seems to have been placed in an upright position and shell casing sitting next to it.

    Once at the stern, ascending onto the starboard beam, we made our way back to the boat, making necessary stops on our way up, still able to see the outline of this truly enormous underwater shipwreck.

    Fujikawa Maru dive site

    Fujikawa Maru

    Fujikawa Maru

    Fujikawa Maru

    Experienced/advance divers
    Dive depth: 9 - 37m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The Fujikawa Maru was built in 1938 by the Mitsubishi Company as passenger/cargo carrier for the Toyo Kaiun Line. Her peacetime duties consisted of carrying raw silk and cotton between South America and India.

    The Japanese Navy took control in December 1940 converting her to an aircraft ferry. As part of her conversion she was fitted with six inch guns at bow and stern. These guns were from the Russo-Japanese War and had been “cannibalized” from decommissioned cruisers. The breech plate on the forward guns displays an 1899 manufacture date.

    Just prior to ‘Hailstone,’ Fujikawa Maru had arrived in Truk and off loaded thirty “Jill” B5N2 bombers onto Eten Airfield. Since these aircraft had been disassembled for shipment, they were unable to help defend Truk and were destroyed on the ground. The Fujikawa Maru was sunk by a single aerial torpedo striking amidship in hold 4, opening to the engine room and causing the eventual sinking . Although the torpedo failed to run properly, its momentum carried it into the ship to detonate. The Fujikawa Maru has long been a favorite amongst Truk’s “Ghost Fleet”. Her magnificent guns, Japanese bathtub and the Zero aircraft still in her hold, make her a “must see” wreck lying on a 120 fsw floor.

    Fujikawa Maru
    Displacement: 6,938 tons
    Length: 435 feet
    Beam: 58.5 feet
    Engine: 1 diesel
    Max Speed: 16 kts.
    Launched: 15 APR 1938. Crew: 48.

    Shotan Maru dive site

    Shotan Maru

    Shotan Maru

    Shotan Maru

    Experienced/advance divers
    Dive depth: 37 - 58m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    We decided this morning would be a good day to try for this deep, medium sized ex-cargo freighter lying on even keel in 50m of clear blue water. It can be difficult to hook as it is positioned between two ridges but after a 10 minute boat journey on this beautifully calm, still day, we had no problem and within 30 minutes of our departure from the ship, the wreck was in clear view as we descended.

    Once on the deck we headed straight for the deepest part which is hold #1 and 2 and after a quick look at the truck that fell overboard sitting at 60m,we entered hold #1 and 2 which are linked and contain trucks and plenty of ammunition. Out of the hold and moving aft, anti-aircraft guns, huge bomb damage and the stern gun covered in soft corals made for some great photography and as the group began to approach 70 bar, we began our ascent. With big game fish such as trevally, dogtooth tuna and barracuda snacking on the abundant fish populations as they swarm and pulsate around the soft corals on the funnel and masts, the ascent was just as entertaining. Once on our 5m stop, the divers were signaling each other their air supplies and checking deco times expecting a drawn out 10 minute stop, but to everyone’s excitement, a small pod of bottlenose dolphins who seemed just as excited as the divers came in for an routine inspection. Amongst the pod was a new mother, her baby no longer than ½ m, who seemed to do extremely well to keep up with the group and after a few minutes of darting and eye to eye contact, they swam off into the blue leaving nothing but some very big smiles on the faces of our small group.

    Shinkoku Maru dive site

    Shinkoku Maru

    Shinkoku Maru

    Shinkoku Maru

    Experienced/advance divers
    Dive depth: 9 - 38m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The Shinkoku Maru was built in 1939 by the Kawasaki Dockyard for the Kobe Sanbashi K.K. Line as a modern tanker. Her construction was subsidized by the fuel starved Japanese Navy and her first voyages were carrying oil from the United States to Japan, prior to the embargo.

    The Imperial Japanese Navy then converted her to a fleet oiler and Shinkoku Maru’s most noteworthy mission was her participation in the Pearl Harbor attack as part of Admiral Nagumo’s strike force. Later she participated in the attack on Ceylon and then performed general re-supply duties. In August 1942, she was torpedoed by an American submarine. She was at anchor in Truk at time of the “Hailstone” attack, surviving two days of attacks and two aerial torpedo hits until finally sinking in mid lagoon at center of then abandoned Combined Fleet moorings.

    The ship is one of the most interesting in the lagoon with vivid corals, and fish life along with fine arrays of shipboard artifacts. Night dives are supreme and rank with ‘best ever’. The soft corals and hydroids that emerge after dark turn Shinkoku Maru into a hanging garden and her medical bay is always an interesting diversion along with arrays of engine and docking telegraphs on an upper bridge level. Huge diesel engines and guns fore and aft round out the attractions. Her depths range from 32 ft at bridge deck to maximum 125 fsw at her stern.

    Shinkoku Maru
    Displacement: 10,020 tons
    Length: 500 feet
    Beam: 65 feet
    Engine: 1 MAN diesel
    Max Speed: 19.8 kts.
    Launched: 13 DEC 1939.

    Betty Bomber dive site

    Betty Bomber

    Betty Bomber

    Betty Bomber

    Experienced/advance divers
    Dive depth: 18m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    Betty was the Allied code name for the Mitsubishi G4M bomber. This aircraft designed in 1939 for the Imperial Japanese Navy, was quite successful during early part of the war, due long range and good carrying capacity. Unprotected fuel tanks proved their greatest undoing, even leading to death of famous Admiral Yamamoto ambushed while aboard one flying out of New Caledonia.

    The G4M was operated throughout the war as both a tactical and torpedo bomber. There were a considerable number of them based at Chuuk’s Param Island, the newest of 5 airports located here. It was a broad duty plane similar to a US Mitchell and was utilized for many purposeful missions. Later reports from eyewitnesses, say there were few pilots at the field, on morning of Feb 16, 1944, and Japanese commanders were pushing mechanics at bayonet tips into the cockpits of close to 50 aircraft sitting vulnerably exposed to incoming attackers.

    Most were destroyed on the ground, but several got off only to be forced down shortly thereafter. The illustrated, badly shot-up craft appeared to be attempting an emergency but failed landing on Eten Island’s fighter strip, crashing into the lagoon on approach, and now lying in 60 ft .

    Mitsubishi G4M: Crew 7
    Wingspan: 85 ft.
    Length: 66 ft.
    Height: 20 ft.
    MATOW: 29,000 lbs
    Engines: 2- 14 cylinder MK4A-11 1530 HP each
    Speed: 266 mph at 14,000 ft
    Ceiling: 29,000 ft
    Range: 1875 NM.
    Armament: 4 x 12.7mm machine guns, 1 x 20mm cannon, 1-1750 lb bomb.

    USS Sgt Major Wm J Pugh dive site

    USS Sgt Major Wm J Pugh

    USS Sgt Major Wm J Pugh

    USS Sgt Major Wm J Pugh

    Beginner divers
    Dive depth: 7 - 14m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Reef and Wreck
    The Pugh is a former USN YFR, a type of vessel designed and built to supply the anchored fleet at large congested naval stations/bases. Three types of vessels were in her class …

    one being a YO for Yard Oiler carrying special lubes to large ships, another was a YF for supplying dry stores, and the a YFR such as this vessel for transporting refrigerated cargo as a Yard Freighter Refrigerated. At end of hostilities she was left to the Philippine government along with other craft, and years later under Gen Marcos’ era was utilized for the leader to transport 11 tons of his gold collections clandestinely over to Tinian Island in the Northern Marianas Islands where the large B29’s had flown from to finish the war against Japan.

    After offloading to a waiting boat for loading onto a clandestine aircraft flying the cargo to Switzerland and into vaults that have yet to be located, the Pugh was ordered to proceed to Truk Lagoon, and leave the ship to return home. The ship sat afterwards for several weeks before locals began to see what they could ’borrow’ from her. About 6-8 months later after being viewed to be slowly sinking, some volunteers towed her down to a location off the South Field former seaplane base to open seacocks and let her settle upright onto a 50ft floor. Today nearly 45 years after sinking, there are many fine corals and fish collecting around a still interestingly intact little reefer ship. Maybe a few grains of gold lying behind those reefer coils in the holds..?

    …at a quick glance,

    Length: about 160ft, beam about 35 ft, 12 ft draft
    Configuration: Accommodation house aft, two holds forward with deck winches, cargo masts
    Machinery: Twin GMC ‘Cleveland 2 stroke engines on twin screws, at 500 hp each
    Refrigeration: Four GMC Detroit 6-71 diesels driving refrigeration compressors
    Probable Speed: 9-10 knots

    Heian Maru dive site

    Heian Maru

    Heian Maru

    Heian Maru

    Beginner divers
    Dive depth: 9 - 28m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The Heian Maru was built in 1930, by Osaka Iron Works for the Nihon Yusen Kaisha Line (NYK) as one of three identical large passenger cargo liners. Her maiden voyage was from Hong Kong to Seattle. While on a routine voyage in August 1941, she was abruptly recalled to Japan, where Japan’s Navy took her and sisters for conversion to submarine tenders.

    They operated in unison with one ship at Truk tending up to 35 submarines, while another would be in Japan for resupply, while the 3 rd was transiting in supply convoys. The convoys took huge losses from wolfpacks of US submarines and after loss of both sisters, the Heian was retained at Truk inspite of lacking supplies, to provide lodging for the reduced numbers of sub crew remaining.

    The Heian Maru was sunk on the second day of the “Hailstone” attack, by Avenger torpedo aircraft from the carrier Bunker Hill. A torpedo struck the engine room amidships setting most of the vessel afire to burn furiously for balance of the day, sinking on her side by day’s end.

    At nearly 12,000 tons, she is the largest ship in Truk Lagoon’s “Ghost Fleet”, after postwar salvage of the much larger oiler ex whale factory, SS Tonan Maru of 22,000 tons. She now lies in 90 fsw.

    Heian Maru
    Displacement: 11,616 tons
    Length: 510 feet
    Beam: 66 feet
    Engine: 2 B & W Diesel Co. diesel
    Max Speed: 18.38 kts.
    Launched: 16 APR 1930. Crew: 150.

    Aikoku Maru dive site

    Aikoku Maru

    Aikoku Maru

    Aikoku Maru

    Experienced/advance divers
    Dive depth: 40 - 64m
    Water temperature: 29 - ℃
    Dive type: Wreck
    On a windy day here in Truk Lagoon, the Aikoku Maru is close by and makes for a more comfortable 10 minute boat ride. After anchoring, we were secure on the wreck and with safety checks done, the ascent onto this deep, legendary technical site was magnificent. Schools of barracuda, dogtooth tuna and jacks flooded the deck and small reef fish taking whatever cover they could find. The first task was to stage our 95% oxygen stages and get to the stern where you will find one of the largest guns Truk Lagoon has to offer. We swam around one of the anti-aircraft guns situated aft of the stack to find a white-tip reef shark sleeping next to the memorial for all of those Japanese men killed at the time of the war. We of course startled it and when out of view we secured our stages and moved towards the stern. Surrounded by activity, and slightly affected by narcosis, it seems surreal to be weightless on these wrecks and have such an array of artillery and ammunition. It is difficult to truly understand this feeling until you have experienced it for yourself. When we finally reached the large stern gun at around 160 ft / 50m we were greeted by a curious hawksbill turtle perched wonderfully at the base of this monstrous gun angled high into the sky, blissfully unaware of what was being used as an elevated viewpoint!

    Once we were all satisfied with photographs and encounters, our ascent was again flooded with pelagic encounters on one of the most magnificent wrecks Truk Lagoon has to offer.

    Momokawa Maru dive site

    Momokawa Maru

    Momokawa Maru

    Momokawa Maru

    Experienced/advance divers
    Dive depth: 27 - 43m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The Momokawa Maru was built in 1940, as a timber transport, and near twin to Nippo Maru. They are both remarkable in having steel bridge houses instead of normal wood or aluminum to avoid compass deviations.

    Her peacetime service consisted of carrying lumber from Siberia to Japan. The Japanese Navy took control of her in late 1943 and utilized her as a bulk cargo carrier.

    During the “Hailstone” attack, Momokawa Maru was bombed by aircraft from the carrier Bunker Hill. In their strike reports they indicated they had hit a large freighter that exploded and sank during the raid.

    Lying on her port side in 140 ft of water, she has interesting cargo of Betty Bomber parts, wheels, and truck frames, plus the most intact bridge house within all wrecks of Truk Lagoon. By holding a camera on its side some remarkable pictures are gained.

    The Momokawa Maru was found by Klaus Lindemann in 1982.

    Momokawa Maru
    Displacement: 3,829 tons
    Length: 352 feet
    Beam: 50 feet
    Engine: 1 turbine steam / coal
    Max Speed: 14.9 kts.
    Launched: 17 AUG 1940.

    Kansho Maru dive site

    Kansho Maru

    Kansho Maru

    Kansho Maru

    Experienced/advance divers
    Dive depth: 12 - 33m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The Kansho Maru was built in 1938 by the Mitsui Dockyard Company as a passenger/cargo carrier for the Mitsui and Kawasaki Lines. The Japanese Navy took control of her when the war began and she was put to work shuttling supplies between Japan and the Marshall Islands. Eventually she was retrofitted with a deck gun and augmented with a Naval gun crew and medical staff for transporting wounded.

    Just prior to the “Hailstone” attack, Kansho Maru was in Kwajalein Atoll delivering supplies, when she was bombed by carrier aircraft and took a hit to her engine room. Unable to get underway, Kansho was towed to Truk by the Momokawa Maru and arrived around January 5, 1944. Both ships were located in the Repair anchorage when the “Hailstone” attack began and after losing their protective air cover, were unable to defend themselves from attack and final sinking. The Kansho Maru was sunk by at least one bomb and an aerial torpedo. She now lies in 130 fsw.

    She is always a favored site within her interiors as a great engine room and machine shop, galley, and other quarters including the Captain’s room where heavy radio equipment have tumbled through from wasted floors of a bridge above. Her empty holds have a few sights of repair/salvage pumps and acetylene torches/welding equipment. Bicycles lie in forward hold.

    She rests on a 105ft floor.

    Kansho Maru
    Displacement: 4,861 tons
    Length: 380 feet
    Beam: 52.5 feet
    Engine: 1 B & W diesel
    Max Speed: 16.8 kts.
    Launched: 30 JUN 1938.

    A6M Zero Fighter dive site

    A6M Zero Fighter

    A6M Zero Fighter

    A6M Zero Fighter

    Beginner divers
    Dive depth: 5 - 7m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    Zero was the Allied code name for the Mitsubishi A6M fighter. The Zero aircraft was designed in 1937 by Jiro Horikoshi for the Imperial Japanese Navy.

    The plane saw action throughout the war and was unmatched in speed and maneuverability until 1942 when modern Allied fighters began to appear. Later the aircraft was found to be very vulnerable due to unprotected fuel tanks and easily caught fire. Approximately 11,300 aircraft where built in various models.

    The A6M was operated throughout the war in various models by the Imperial Japanese Navy. Primarily a fighter, it was also used as a tactical bomber and Kamikaze attack aircraft. However, after the “cream” of Japanese Naval Aviators were lost at the Battle of Midway, there were never enough experienced pilots available to fly the Zero to its full potential.

    This Truk aircraft wreck is believed to have crashed on takeoff from Eten Island. Whether it was shot down or suffered from mechanical failure is unknown. She now lies in 20 fsw.

    Mitsubishi A6M3 Naval Carrier Fighter: Crew 1
    Wingspan 29.7 ft.
    Length 29.7 ft.
    Height 9.6 ft.
    MATOW 2644 lbs
    Engine: 1 supercharged Sakae1130 HP each
    Speed 338 mph at 6,000 ft
    Range 2380 NM.
    Armament: 2 x 7.7mm machine guns, 2 x 20mm cannon.

    Hokuyo Maru dive site

    Hokuyo Maru

    Hokuyo Maru

    Hokuyo Maru

    Experienced/advance divers
    Dive depth: 40 - 64m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The Hokuyo Maru was built in 1937, by the Uraga Dockyard Senryu as a medium coastal freighter for the Kita Nikon Kisen Line. She was designed to operate between North Korea, Hokkaido and other Japanese islands and as a result had a very strong bow to penetrate ice flows.

    During the “Hailstone” attack, Hokuyo Maru was attacked by aircraft from the carrier Essex and sunk by a bomb that struck her starb’rd aft side of 3rd hold. The subsequent explosion blew out a closely adjacent starb’r boiler leaving twin gaping holes in both the hold and boiler room. She sits upright with an intact housework and funnel and is a very enjoyable, but deep dive, now lying on a 200 fsw floor.

    Hokuyo Maru
    Displacement: 4,217 tons
    Length: 354 feet
    Beam: 50 feet
    Engine: 1 low pressure steam turbine / coal
    Max Speed: 15.85 kts.

    Nagano Maru dive site

    Nagano Maru

    Nagano Maru

    Nagano Maru

    Experienced/advance divers
    Dive depth: 40 - 64m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The Nagano Maru was built in 1917 by Mitsubishi Heavy Industries for the Nippon Yusen Kaisha (NYK) Line as a freighter. In the fall of 1937 she was drafted by the Imperial Japanese Army to carry troops to China for the war in Manchuria. She was returned to civilian service until 1941 when the Imperial Japanese Navy took her over. She served on Naval command, until again being placed under control of the Army in 1942.

    During the days leading up to the “Hailstone” attack, Nagano Maru was sent south to Morotok (Mortlocks) to supply the airfield there. She returned to Truk just in time for the “Hailstone” fighter sweep and was observed firing on attacking aircraft. This resulted in her being strafed on the first raid and bombed on the second attack. Several near misses severely damaged the vessel and fragments from one bomb killed her Captain. The sinking vessel was finally abandoned and sank on the first day of the operation. Nagano Maru now rests upright at a maximum depth of 220 fsw.

    Nagano Maru
    Displacement: 3,810 tons
    Length: 345 feet
    Beam: 50 feet
    Engine: 1 coal driven steam turbine
    Max Speed: 14.3 kts.
    Launched: 25 APR 1917.

    Hanakawa Maru dive site

    Hanakawa Maru

    Hanakawa Maru

    Hanakawa Maru

    Beginner divers
    Dive depth: 30 - 35m
    Visibility: 10 - 20m
    Water temperature: 29 - ℃
    Dive type: Wreck
    The Hanakawa Maru was built in 1943 by the Kawasaki Dockyard as special transport for the Japanese Imperial Navy, similar in construction to Nippo and Momokawa. This Standard B freighter served from 25 October 1943 until being sunk on the second day of the “Hailstone” raids, while over replenishing the garrison at distant Tol Island Harbor.

    During the air strikes, Hanakawa Maru was attacked by aircraft from carriers Bunker Hill and Cowpens. An Avenger torpedo bomber from the Bunker Hill sunk her with a torpedo hit on her starboard bow setting her cargo of chemical gasoline drums ablaze. Like the Hoki Maru, the chemical substances were toxic and she was not dived for years until bubbles finally ceased to rise.

    She has many soft and brilliant corals on her topsides and masts, although often a murky location at her upright position with depth of 110 fsw to her keel.

    Hanakawa Maru
    Displacement: 4,793 tons
    Length: 368 feet
    Beam: 52 feet
    Engine: 1 coal fired turbine
    Max Speed: 15 kts.
    Launched: 31 AUG 1943.

    IJN Eissen 761 dive site

    IJN Eissen 761

    IJN Eissen 761

    IJN Eissen 761

    Beginner divers
    Dive depth: 6 - 12m
    Visibility: 10 - 30m
    Water temperature: 29 - ℃
    Dive type: Wreck
    IJN Eissen 761 was a 110 ft steam powered harbor tug that also survived the war, to be left anchored in a small cove at west side of Dublon Island.

    She now lies upright in just 25 ft of murky water, but has several interesting artifacts to view and photograph. Her tiny bridge house contains two horizontal movement engine telegraphs for maneuvering orders to her twin triple expansion engines driven by steam from a big single Scotch type boiler. She appears to be on a size scale of many New York railway tugs of that era and likely had about 1,000 total horsepower judging by engine sizes. Her accommodations are small and difficult to enter, although some divers succeed at doing so.

    She suits as a final dive at day’s end for curious divers to view.