What are the deepest, biggest and most popular Truk Lagoon Wrecks?

I have spent a bit of time compiling a list of the Truk Lagoon wrecks. If you’re planning a trip to Truk or Chuuk Lagoon, I’m hoping this article will help you do just that. However, please add a comment below, if it could be improved in any way.
Truk Lagoon wrecks or Chuuk Lagoon wrecks?
Truk Lagoon is the name these Pacific lagoons and islands were named in 1944 when they were in Japanese occupation. However, the name of Truk Lagoon was changed in 1990 to Chuuk Lagoon.
Scuba divers seem to use these two names synonymously. Whilst the correct name is Chuuk Lagoon, at the time these ship wrecks were sunk, which are now dived by scuba divers across the world, it was named Truk Lagoon.
For the purpose of this article, I am going to continue referring to Truk Lagoon as Chuuk Lagoon instead.
Chuuk Lagoon wrecks – A complete list in alphabetical order
Below is a table showing the majority of the Chuuk Lagoon wrecks for scuba diving. To scroll through the wrecks, click on the ‘Next’ button below and then to scroll back, click on the ‘Previous’button.
You can also search of a specific wreck too in the search box below.
Truck Lagoon Wrecks or Chuuk Lagoon Wrecks for scuba divers |
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Aikoku Maru |
Type: |
Converted armed merchant cruiser |
Weight: |
10437 tons |
Length: |
161 metres (527 feet) |
Beam: |
20 metres (66 feet) |
Depth: |
24-64 metres (80-210 feet) |
Location: |
East of Dublon |
Comments: |
She was reconverted to a transport ship. This wreck has been know to emit a skin-burning substance, which is possibly fuel. Limited diving due to depth and its exposed location. |
Amigisan Maru |
Type: |
Armed passenger-cargo transport ship |
Weight: |
7620 tons |
Length: |
137 metres (450 feet) |
Beam: |
18 metres (60 feet) |
Depth: |
34 metres (110 feet) |
Location: |
Southwest of Uman |
Comments: |
Excellent visability. She has a gun on her bow and there are manyartifacts |
Fujikawa Maru |
Type: |
Converted aircraft transport |
Weight: |
6938 tons |
Length: |
133 metres (436 feet) |
Beam: |
18 metres (59 feet) |
Depth: |
15-37 metres (50-120 feet) |
Location: |
South of Eten |
Comments: |
One of her masks breaks the surface. One of the top wrecks of Truk Lagoon. Hold contains ZEKE fighters and other equipment. Outer upper deck is covered with corals, sponges and algae. Has a large deck gun |
Fujisan Maru |
Type: |
Tanker |
Weight: |
9524 tons |
Length: |
149 metres (490 feet) |
Beam: |
20 metres (65 feet) |
Depth: |
37-61 metres (120-200 feet) |
Location: |
Southest of Moen |
Comments: |
Small amounts of coral growth. Has many artifacts to explore. |
Fumitsuki Destroyer |
Type: |
Mutsuki Class Destroyer |
Weight: |
1913 tons |
Length: |
97 metres (320 feet) |
Beam: |
9 metres (30 feet) |
Depth: |
30-40 metres (100-130 feet) |
Location: |
North-west of Fefan Island and west of the southern end of Moen Island |
Comments: |
One of two destroyers and one of three purpose built war ships of Truk Lagoon. Sits upright, listing to port. Extensive marine growth, many schools of fish. Stern uplifted by explosion. There is a bow gun near the forecastle, Long Lance torpedo launchers between the forecastle and bridge, and aft gun and winches, cables and depth charge throwers are on the stern. |
Futagami Tugboat |
Type: |
Tug boat |
Weight: |
625 tons |
Length: |
12 metres (40 feet) |
Beam: |
2 metres (6 feet) |
Depth: |
15-28 metres (50-92 feet) |
Location: |
Near Tonoas |
Comments: |
In the bridge there are twin telegraphs and wheel housing. Visability not so good on this wreck. |
Gosei Maru |
Type: |
Cargo transport |
Weight: |
1931 tons |
Length: |
83 metres (272 feet) |
Beam: |
12 metres (40 feet) |
Depth: |
3-37 metres (10-120 feet) |
Location: |
183 metres (200 yards) off the east side of Uman |
Comments: |
Abundant sea life and a popular wreck with scuba divers. She is a flat bottomed boat used to load and unload ships at anchor. |
Heian Maru |
Type: |
Converted submarine tender |
Weight: |
11614 tons |
Length: |
155 metres (510 feet) |
Beam: |
20 metres (66 feet) |
Depth: |
15-34 metres (50-110 feet) |
Location: |
457 metres (500 yards) west of Dublon |
Comments: |
Largest wreck in the lagoon with a large deck gun on the stern |
Hino Maru No. 2 |
Type: |
Gunboat and sub chaser |
Weight: |
9998 tons |
Length: |
6 (200 feet)1 metres |
Beam: |
11 metres (35 feet) |
Depth: |
3-18 metres (9-60 feet) |
Location: |
West of Uman |
Comments: |
Known as the Gun High wreck. Although the bow is on 6 feet from the surface, the deck gun is just 3 feet from the surface. Plenty of photographic opportunities and is good for snorklelling. |
Hoki Maru |
Type: |
Cargo transport |
Weight: |
7112 tons |
Length: |
137 metres (450 feet) |
Beam: |
18 metres (59 feet) |
Depth: |
24-50 metres (80-165 feet) |
Location: |
Eten Island anchorage |
Comments: |
She was originally declared off limited to scuba divers to to the presence ofcaustic substances. But has since been cleared for diving trips. The holds contain many types of cargo, bombs, ammunition, and vehicles, including a Diesel roller, 4 Isuzu Type 94 trucks, 2 tractors (one similar to a John Deere, the other is a Komatsu), 2 small bulldozers and a prime mover. |
Hokuyo Maru |
Type: |
Passenger-cargo transport |
Weight: |
4216 tons |
Length: |
109 metres (358 feet) |
Beam: |
15 metres (49 feet) |
Depth: |
37-61 metres (120-200 feet) |
Location: |
Eten Anchorage |
Comments: |
Passenger freighter sitting upright, with interesting bridge and engine room. |
Hoyo Maru |
Type: |
Oil tanker |
Weight: |
8691 tons |
Length: |
145 metres (475 feet) |
Beam: |
19 metres (61 feet) |
Depth: |
3-30 metres (9-100 feet) |
Location: |
366 metres (400 yards) north of Fefan |
Comments: |
Poor visability due to silt and dangerous for scuba divers to enter |
I-169 Submarine |
Type: |
Submarine |
Weight: |
1400 tons |
Length: |
98 metres (322 feet) |
Beam: |
8 metres (27 feet) |
Depth: |
37-43 metres (120-140 feet) |
Location: |
West of Dublon |
Comments: |
Considered dangerous to enter. Not dived as much by divers, due to the lack of penetration and coral formations on the outside |
Kansho Maru |
Type: |
Passenger cargo ship |
Weight: |
4862 tons |
Length: |
117 metres (384 feet) |
Beam: |
16 metres (52 feet) |
Depth: |
18-40 metres (60-130 feet) |
Location: |
North of Fefan |
Comments: |
Considered to be one of the best wrecks in Truk Lagoon to dive. There are many artifacts. Lies upright with 20° list to port. |
Kikukawa Maru |
Type: |
Passenger-cargo transport |
Weight: |
3833 tons |
Length: |
108 metres (354 feet) |
Beam: |
15 metres (50 feet) |
Depth: |
21-37 metres (70-120 feet) |
Location: |
Eten Island anchorage - East side |
Comments: |
Wreck is in poor condition and lies on her starboard side. Only the front half remains, which is upside down. Holds have many airplane parts and fuel drums |
Kiyozumi Maru |
Type: |
Converted armed merchant cruiser |
Weight: |
8613 tons |
Length: |
138 metres (453 feet) |
Beam: |
19 metres (61 feet) |
Depth: |
12-37 metres (40-120 feet) |
Location: |
549 metres (600 yards) north of Fefan |
Comments: |
Was later converted to a transport ship. It has been leaking oil right up to recently and there's often been a slick visable at the surface. |
Matsutani Maru or Shotan Maru |
Type: |
Cargo ship |
Weight: |
1999 tons |
Length: |
87 metres (285 feet) |
Beam: |
13 metres (43 feet) |
Depth: |
37-46 metres (120-150 feet) |
Location: |
Near Fanamu Island |
Comments: |
Contains artifacts and No.1 hold has two flatbed trucks with cranes, but only the frames of these remain. There are two AA guns that are near the damaged smokestck. And there's a 3 inch gun at the stern. |
Momokawa Maru |
Type: |
Passenger-cargo transport |
Weight: |
3829 tons |
Length: |
107 metres (352 feet) |
Beam: |
15 metres (50 feet) |
Depth: |
37-43 metres (120-140 feet) |
Location: |
1/2 mile from Dublon |
Comments: |
Contains many artifacts |
Nagano Maru |
Type: |
Passenger-cargo transport |
Weight: |
3824 tons |
Length: |
105 metres (345 feet) |
Beam: |
15 metres (49 feet) |
Depth: |
43-64 metres (140-210 metres) |
Location: |
4th Fleet Anchorage east of Dublon Island |
Comments: |
A large intact flatbed truck, a second truck, bulldozer or prime mover truck, machinery items, detached trailers, and a diesel roller can all be found in various holds. There's also a collection of china and serving items. |
Nippo Maru |
Type: |
Converted cargo transport ship |
Weight: |
3764 tons |
Length: |
108 metres (353 feet) |
Beam: |
15 metres (49 feet) |
Depth: |
37-47 metres (120-155 feet) |
Location: |
East of Dublon |
Comments: |
One of the most popular wrecks as it contains a variety of artifacts. There's a battle tank and 3 anti-tank Howitzer guns on the starboard deck. There are very picturesque helm and engine telegraphs providing excellent photo opportunities. The Nippo Maru has such an interesting cargo of war materials (shells, detonators, rifle ammunition), equipment (water tanks, gas masks, mess kits, shoes), and other artifacts (beer bottles) that it has become one of the most popular wrecks in Truk Lagoon. |
Oite |
Type: |
Kamikaze Class Destroyer |
Weight: |
1523 tons |
Length: |
100 metres (327 feet) |
Beam: |
9 metres (30 feet) |
Depth: |
52-62 metres (170-205 feet) |
Location: |
Towards the north end of the lagoon |
Comments: |
Shes in good visibility and there's many artifacts. Her twin propellers can still be seen in the sand. On the stern there’s depth charge throwers with depth charges loaded into a rack nearby, 2 anti aircraft guns and a One of only three actual war-ships which was perpurse built fo the war. 4.7’’ main battery gun. Located on the sand you can find the torpedo launchers with torpedoes loaded inside. |
Ojima |
Type: |
Salvage and repairship/tub boat |
Weight: |
812 tons |
Length: |
49 metres (161 feet) |
Beam: |
9 metres (29 feet) |
Depth: |
46-50 metres (150-164 feet) |
Location: |
Eten Island anchorage - East side |
Comments: |
Has a couple of Daihatsu landing craft on the wreck. |
Reiyo Maru |
Type: |
Passenger-cargo transport |
Weight: |
5446 tons |
Length: |
122 metres (400 feet) |
Beam metres: |
16 metres (53 feet) |
Depth: |
53-67 metres (175-220 feet) |
Location: |
Eton Anchorage |
Comments: |
The holds are mostly empty. Due to her depth, little coral growth is apparent, and it is not often dived. |
Rio De Janeiro |
Type |
Converted submarine tender |
Weight |
9626 tons |
Length |
141 metres (461 feet) |
Beam metres |
19 metres (62) |
Depth |
10-33 metres (35-110 feet) |
Location |
457 metres (500 yards) off the east side of Uman |
Comments |
This was reconverted to a transport ship. Has large deck guns. There's abundant see life and great visibility. She lies on her starboard side. |
San Francisco Maru |
Type: |
Passenger-cargo transport |
Weight: |
5831 tons |
Length: |
117 metres (385 feet) |
Beam: |
16 metres (52 feet) |
Depth: |
42-64 metres (140-210 feet) |
Location: |
Eten Island anchorage - East side |
Comments: |
Considered to be one of the most exciting of wrecks in Truk Lagoon. Many artifacts |
Sankisan Maru |
Type: |
Cargo transport |
Weight: |
4752 tons |
Length: |
116 metres (380 feet) |
Beam: |
16 metres (53 feet) |
Depth: |
15-30 metres (49-100 feet) |
Location: |
West of Uman |
Comments: |
Has several trucks lashed to the deck. There are many artifacts. Mostof the forward deck is covered in coral, plus an abundance of sea life and excellent visability |
Seiko Maru |
Type: |
Cargo ship |
Weight: |
5385 tons |
Length: |
119 metres (392 feet) |
Beam : |
16 metres (53 feet) |
Depth: |
23-49 metres (75-160 feet) |
Location: |
Eten Island anchorage - East side |
Comments: |
China and other artifacts in superstructure. Field gun on bow. The wreck is in a reasonably good stage of preservation, but due to its depth, it is rarely visited. |
Shinkoka Maru |
Type: |
Oil tanker |
Weight: |
10200 tons |
Length: |
152 metres (500 feet) |
Beam: |
20 metres (65 feet) |
Depth: |
12-40 metres (40-130 feet) |
Location: |
3.5 miles southwest of Moen |
Comments: |
Wreck is in excellent condition and contains many artifacts. Her forward deck is covered in soft coral and there's plenty of marine life. |
Susuki Patrol Boat No. 34 |
Type: |
Converted patrol boat/sub chaser |
Weight: |
770 tons |
Length: |
84 metres (275 feet) |
Beam: |
8 metres (26 feet) |
Depth: |
3-15 metres (10-50 feet) |
Location: |
Between Fefan (Northeast) and Dublon (Southwest}) |
Comments: |
Lies upright and lists 20° to port |
Taiho Maru |
Type: |
Cargo transport |
Weight: |
2827 tons |
Length: |
93 metres (305 feet) |
Beam: |
14 metres (45 feet) |
Depth: |
27-44 metres (90-145 feet) |
Location: |
South of Fefan |
Comments: |
Was dangerous to scuba divers as it's leaking aviation fuel. Many fuel drums and 2 landing craft nearby. |
Tonan Maru No. 3 |
Type: |
Converted tanker |
Weight: |
19209 tons |
Length: |
163 metres (535 feet) |
Beam: |
23 metres (75 feet) |
Depth: |
Salvaged post war |
Location: |
Salvaged post war |
Comments: |
Prior to the war she was used as a whale factory. Only remnants are left as the Totnan Maru No. 3 was raise for salvage after the warNothern part of the Fenan Dublon channel anchorage |
Unkai Maru No. 6 |
Type: |
Cargo transport |
Weight: |
3220 tons |
Length; |
101 metres (331 feet) |
Beam: |
15 metres (49 feet) |
Depth: |
24-40 metres (80-130 feet) |
Location: |
North of Uman |
Comments: |
Lies upright on the bottom. Has a 3 inch bow gun. Many artifacts can be found on this wreck, including boots, shoes and gas masks. |
Yamagiri Maru |
Type: |
Passenger cargo transport ship |
Weight: |
6438 tons |
Length: |
134 metres (439 feet) |
Beam: |
18 metres (58 feet) |
Depth: |
15-34 metres (50-110 feet) |
Location: |
North-northwest of Fefan |
Comments: |
There arer 18-inch warheads in the hold which were for the battle ships Masashi and Yamato. There's plenty of sea fans and corals across her bridge. There are 6 holds large and open enough to swim into. In the engine room there was a skull embedded into the overhead space. Large masts and two depth charges, one each side of the stern still in their racks. |
Yubai Maru |
Type: |
Cargo transport |
Weight: |
3217 tons |
Length: |
93 metres (305 feet) |
Beam: |
13 metres (44 feet) |
Depth: |
15-36 metres (50-118 feet) |
Location: |
West of Uman, Near Fefan |
Comments: |
Lies on her port side. The engine room has the gauges, telegraph and boilers. Lots of hard coral is forming on the huge keel. |
Which are the deepest of the Truk Lagoon Wrecks?

Truk Lagoon diving depths range from a shallow 15 metres (50 feet), through to 67 metres (220 feet).
One of the deepest wreck of Truk Lagoon, or should I say Chuuk Lagoon is the San Fransisco Maru. But not the deepest. She lies in 64 metres (210 feet) of water, which means that only the most advanced divers can diver her.
One of the deepest wreck of Truk Lagoon, or should I say Chuuk Lagoon is the San Fransisco Maru. But not the deepest. She lies in 64 metres (210 feet) of water, which means that only the most advanced divers can diver her.
Even the shallowest part of the San Francisco Maru wreck is at 43 metres (140 feet). This means that you can’t dive for too long before going into decompression stop diving.
I include the San Francisco Maru first in the deepest Chuuk Lagoon wrecks, as she is considered to be one of the most exciting of the Chuuk Lagoon wrecks, with her many artifacts still remaining in her midst. This includes a battle tank, as featured in the above image of her.
The San Francisco Maru wreck was a passenger cargo ship measuring 117 metres (385 feet). She was 5,831 tons and operated in world trade operations in minerals such as coal, bauxite, and phosphate for transportation to the Japanese Empire.
Divers will get to see a bow gun, trucks, tanks, mines, shells, bombs, aircraft engines, ammunition, china and depth charges on stern.
The San Francisco Maru was 117 metres (385 feet) in length and weighed 5,831 tons. This passenger-Cargo ship was built in 1919 for Yamashita Kisen Kabushiki Kaisha.
The deepest Chuuk Lagoon wreck – Reiyo Maru No. 6

Reiyo Maru is the deepest of all Chuuk Lagoon wrecks you can scuba dive. She is sitting in 67 metres (220 feet) of water and even the shallowest part of her is at 53 metres (175 feet).
With the limit for recreational divers set at 40 metres, the Reiyo Maru wreck is off-limits for most scuba divers.
The Reiyo Maru wreck was a passenger cargo ship built in 1920. She was 121 metres (400 feet) long and weighed 5,446 tons.
Reiyo Maru was sunk by US aircraft on the first day of Operation Hailstone. She was sunk by American dive bombers which came from the USS Essex. These bombers scored two direct hits with 1,000 lb. bombs.
Which is the biggest Truk Lagoon wreck?

Depending on how you measure the biggest wreck of Truk Lagoon, depends on which is considered the biggest.
If we look at this in terms of weight, the largest of all the wrecks in Chuuk Lagoon you can dive is Heian Maru. Heian Maru is a converted submarine tender and weighed in at 11,614 tons.
This ghost fleet ship was be sunk by American Forces during Operation Hailstone and stood in at 155 metres (510 feet) in length.
Heian Maru is lying in 11-33 metres (35-110 feet) of water on her port side.
Inside the superstructure you’ll see shells (bombs), torpedoes, submarine periscopes, china plates, Sake bottles, medical kits, a bath tub, a radio room and many other artifacts.

Her name can be clearly seen on the side of her hull, as show in the above picture of her. You can also see her huge propellers too.
The longest Truk Lagoon wreck

The next measure to judge the biggest wreck in Chuuk Lagoon is using length as a measure. The longest ship in this sunken ghost fleet is the Aikoku Maru wreck.
The Aikoku Maru, which is a converted passenger freighter, is sitting upright with her fore ship destroyed.
It has AA guns and a huge stern gun and personal artifacts. This wreck lies at a depth of 24-64 metres (8-210 feet).
The Aikoku Maru has a length of 155 metres (527 feet) and weighed in a 10,437 tons.
The shallowest wreck of Chuuk Lagoon
Hino Maru No. 2 is in the shallowest of waters in Chuuk Lagoon, with the shallowest part at just 2 metres (6 feet).
The deepest part of Hino Maru No. 2 is at 18 metres (60 feet) making her one of 19 wrecks that can be dived by recreational divers limited to 40 metres.
The Hino Maru No. 2 is known as the ‘Gun High’ wreck. Although the bow is only 6 feet from the surface, the deck gun is just 3 feet below the surface.
There are plenty of photographic opportunities on this shallow wreck of Chuuk Lagoon, which is also good for snorkeling too.
How deep are the wrecks in Truk Lagoon?

As already noted above the Truk Lagoon diving depths range from 15 metres (50 feet) through to 67 metres (220 feet) deep.
Whilst on the one hand the shallower dive can be dived by any certified scuba diver, on the other hand the deepest dive on the Reiyo Maru can only be dived by certified technical divers.
You’ll be able to see the various depths of the wrecks in Truk Lagoon, but I thought it would be useful to grade the wrecks in terms of depths.
I’ve used the deepest part of the wreck for this purpose, as you don’t tend to dive a wreck for its shallowest part.
The following categories of the wrecks in Truk Lagoon are using the max depths for each of the wrecks.
However, you’ll see that some of the wrecks are only just over the category limit and could easily be dived using a shallower dive profile. This is so long as you limit your depth to your planned depth rather than the deepest part of the wreck you dive.
Always remember: Plan your dive and dive the plan!
This further article on how deep are the dives in Truk Lagoon, has an easy to follow table, which gives a better idea of which wrecks you might be able to dive on each dive depth profile.
Truk Lagoon diving depths – up to 20 metres (66 feet)
There are just two wrecks that fall into this category, if you exclude the plane wrecks sitting in Truk Lagoon.
These are Susuki Patrol Boat No. 34 (15 metres or 50 feet) and Hino Maru No. 2 (18 metres or 60 feet).
Truk Lagoon diving depths – up to 30 metres (100 feet)

In addition to the above two wrecks that are up to 20 metres (66 feet) deep (which of course are up to 30 metres (100 feet) deep too), there are a further three wrecks, making a total of five wrecks up to 30 metres (100 feet) deep in Truk Lagoon.
These include the Hoyo Maru, Futagami Tugboat and the Sankisan Maru.
For example, Sankisan Maru has several trucks lashed to the deck. There are many artifacts around her and most of her forward deck is covered in coral. Additionally, there’s an abundance of sea life and there’s excellent visibility on this wreck dive.
But the wreck which is featured in the above underwater photo is the
Hoyo Maru wreck.
The Hoyo Maru wreck was a tanker. At the time she was sunk, she was undergoing repairs due to being torpedoed in November 1943. She finally came to rest on the seabed on 17 February 1944.
As she sank, she capsized and now she lies upside down with a broken back. The engine room is damaged, but still accessible by scuba divers and the main hull is covered in hard corals.
The Hoyo Maru wreck is sitting at a depth of 3-30 metres (9-100 feet). She is 145 metres (475 feet) in length and weighed 8,691 tons.
She was built in 1936 originally as a commercial oiler, but was requisitioned by the Japanese Navy in 1941.
Truk Lagoon diving depths – up to 40 metres (131 feet)

There are a total of 19 wrecks which are sitting in a depth of 40 metres or less in Chuuk Lagoon. That’s a lot of wrecks to dive on a scuba diving holiday, which means you don’t have to go extra deep to enjoy the Chuuk Lagoon wrecks.
The wrecks which are in addition to the wrecks already listed in the 20 and 30 metre depth ranges above include Yamagiri Maru, Rio De Janeiro, Heian Maru, Amigisan Maru, Yubai Maru, Gosei Maru and Kiyozumi Maru.
The wreck Rio de Janeiro Maru, as featured in the above image, was a 140 metre (461 feet) long passenger liner. She was sunk on 17 February 1944 by US aircraft during Operation Hailstone.
She is lying on her starboard side in 15-33 metres (50-110 feet) of water. There’s abundant see life and great visibility on this great diving wreck.
Points of interest for scuba divers include a huge stern gun, several large gun turrets and gun barrels in the holds. There are also many beer bottles and there’s good access to the wreck with an interesting engine room.
Truk lagoon diving depths – over 40 metres

The rest of the Truk Lagoon wrecks lie in waters in excess of 40 metres, starting with the I-169, as show in the above image.
The I-169 Submarine along with the Momokawa Maru are only just over the recreational diver depth of 40 metres and sit in 43 metres (140 feet) of water.
So in theory if you’re a recreational diver and would like to dive another two wrecks of Truk Lagoon, you probably can. So long as you stay off the bottom by the additional three metres (9 feet), you’ll be fine.
One other wreck you could include in your Truk Lagoon dive plan or itinerary, is the Taiho Maru, which sits in 44 metres of water.
Truk Lagoon diving depths – up to 50 metres (164 feet)

If you are a dive leader with BSAC, you are permitted to dive up to 50 metres (164 feet).
That means you are able to dive on a further eight wrecks in addition to the wrecks sitting in 40 metres of water. These include the ones discussed above sitting in 43-44 metres (140-145 feet) of water too.
The additional five wrecks include the Matsutani Maru or Shotan Maru, Nippo Maru, Seiko Maru, Ojima and the Hoki Maru wrecks.
Truk Lagoon diving depths – over 60 metres (197 feet)

The rest of the wrecks in Chuuk Lagoon are in excess of 60 metres and will require advanced and very deep diver experience and training.
For these depths of dive you will need to be introduced to mixed gas type diving and you may be better off using a rebreather. Although having said that, many technical divers still dive to these extreme depths using compress air tanks.
If you are a very keen wreck diver and love to go deep, and you have the relevant certifications and experience, then you will probably want to dive on the San Fransisco Maru. The San Fransisco Maru is considered to be one of the most exciting wrecks of Chuuk Lagoon.
The most popular wrecks of Truk Lagoon

The most popular wreck of Truk Lagoon would include Fujikawa Maru wreck., Rio de Janeiro Maru, Heian Maru Wreck, Aikoku Maru Wreck (see above), Nippo Maru Wreck, San Francisco Maru Wreck (see above) and the Shinkoku Maru Wreck.
Why the Fujikawa Maru is one of the most popular Truk Lagoon wrecks
Fujikawa Maru is popular because of the iconic workshop compressor which looks like R2D2, as per the image above image.
The Rio de Janeiro Maru wreck is popular because of its huge stern gun, it has several large gun turrets and gun barrels in the holds.
There are also many beer bottles and there’s good access to the wreck with an interesting engine room.

The Heian Maru Wreck is made popular by divers because there are many relics and artifacts and the interior is easy to penetrate for divers. Inside the superstructure you’ll see shells (bombs), torpedoes, submarine periscopes, china plates, Sake bottles, medical kits, a bath tub, a radio room and many other artifacts.
But also her huge propeller is still intact, as the the image above.
More Reading: Recovery of the Junkers Jumo 211 (recovery of underwater artifacts)
Why the Nippo Maru is one of the most popular wrecks

On-board the Nippo Maru she had coastal defense guns, field artillery, trucks, a battle tank (see above image), machine guns, shells, mines. Nippo Maru has a particularly photogenic bridge.
These are what makes her one of the most popular Truk Lagoon wrecks to scuba dive.
To see the location of the Truk Lagoon wrecks on a map, please follow this link to: Truk Lagoon wreck map.
I hope you enjoyed this article about Truk Lagoon wrecks
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Have fun and be safe!