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Dive Review of Thorfinn in

Thorfinn: "Diving at Truk (Chuuk) Lagoon", Aug, 2004,

by Andrew Falconer , WA, AU (Top Contributor Top Contributor 48 reports with 23 Helpful votes). Report 10232.

No photos available at this time

Ratings and Overall Comments 1 (worst) - 5 (best):

Accommodations N/A Food N/A
Service and Attitude N/A Environmental Sensitivity N/A
Dive Operation N/A Shore Diving N/A
Snorkeling N/A
Value for $$ N/A
Beginners 3 stars
Advanced 3 stars
Comments Truk (or Chuuk) Lagoon is a tiny landmass in the Pacific Ocean, just north of the equator and is part of the Federated States of Micronesia. During the Second World War it was a supply base for the Japanese as they spread out across the Pacific as it provided an ideal sheltered harbor for them. In 1944 as the tide of war turned against them, the Americans carried out a surprise attack over several days, which sunk about 90 Japanese ships, mostly armed merchantmen.
As a result Truk Lagoon is a wreck diving location like no other……

Location of Truk (Chuuk) Lagoon in the Pacific Ocean in relation to SE Asia and Australia

Getting to Truk is not easy and is expensive. In 2004 I flew from Cairns to Guam (overnight) and then on to Truk with Continental Airlines. In 2017, it appears that there are no direct flights from Cairns (or anywhere else in Australia) to Guam. There are two options for diving at Truk: liveaboard or land based resort. The former is expensive, but is more convenient as the ship can provide close access to the wrecks, avoiding lengthy to and from boat rides. In 2004 I dived from the Thorfinn, a converted icebreaker, which has been at Truk Lagoon for many years and is still there. Thorfinn is large, roomy and is still powered by steam driven pistons! The ship itself does not move much, remaining anchored in the vicinity of most of the wrecks, with RIBs to access the dive sites. The wrecks range in depth from the surface to plus 50metres. There are about 25 wrecks that are commonly dived. On Thorfinn you can dive up to five per day, although for me three was enough.

Welcome sign at the airport

The liveaboard dive boat Thorfinn

Propeller and cargo gantry of one of the wrecks

Diving along the deck and inside one of the wrecks

There are some interesting walls covered with marine growth

Deck gun turret and barrel and tank on the deck (San Francixco Maru)

An old rubber boot

Engine room gauge

Tea pot and container with bottle

Bottles of sake lying everywhere

Fuel tanks

Fuselage of an aircraft

Mobile anti aircraft gun on deck

Small tank on deck


Sankisan Maru & Seiko

Kansho & Kiyosumi Maru

Shinkoku & Shotan Maru

Amagisan Maru & Betty Bomber

Rio de Janeiro & San Francisco Maru
{Some photos from this trip can be found at [ link] }

Reporter and Travel

Dive Experience 501-1000 dives
Where else diving Australia, Indonesia, Malaysia, Vanuatu, South Africa, Iceland, Scotland, Norway, Cuba, Maldives, Chuuk, Galapagos, Phillipines, Sri Lanka
Closest Airport Chuuk Getting There Via Guam

Dive Conditions

Weather Seas
Water Temp 26-29°C / 79-84°F Wetsuit Thickness
Water Visibility 10-15 M / 33-49 Ft

Dive Policy

Dive own profile ?
Enforced diving restrictions [Unspecified]
Liveaboard? no Nitrox Available? N/A

What I Saw

Sharks None Mantas None
Dolphins None Whale Sharks None
Turtles None Whales None
Corals N/A Tropical Fish N/A
Small Critters N/A Large Fish N/A
Large Pelagics N/A

Underwater Photography 1 (worst) - 5 (best):

Subject Matter N/A Boat Facilities N/A
Overall rating for UWP's N/A Shore Facilities N/A
UW Photo Comments [None]
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Subscriber's Comments

By Simon C Mallender in Allambie, AU at Jan 18, 2019 19:37 EST  
Chuuk/Truk has been notoriously hard to get to, but now Air Niugini fly from a few Australian capital cities to Port Moresby with good connections on to Chuuk ON WEEKENDS. Forget what you may have thought about Air Niugini - they now have a modern fleet of Fokkers.
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Note: The information here was reported by the author above, but has NOT been reviewed nor edited by Undercurrent prior to posting on our website. Please report any major problems by writing to us and referencing the report number above.

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