Heian Maru Wreck Of Truk Lagoon (Details Of Truk Lagoon Wrecks)

Heian Maru Wreck - Truk or Chuuk Lagoon - The Name Plaque On its Bow larger

Heian Maru was a Converted submarine tender and was sunk during Operation Hailstone

This short article about the Heian Maru wreck is to provide you with a few basic details about this Japanese World War II ship. The Heian Maru is one of the many Truk Lagoon wrecks for scuba divers to dive in Chuuk Lagoon.

Truk Lagoon wreck Heian Maru was sunk by American aircraft at Chuuk Lagoon during Operation Hailstorm in 1944. The Heian Maru is the largest of Chuuk’s “Ghost Fleet” wrecks and was a converted submarine tender, but originally a Japanese ocean liner weighing 11,614 tons and 155 metres (510 ft) long.

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 renamed 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 Japanese ships were sunk it was named Truk Lagoon.

The wrecks are now dived by scuba divers from across the world.

Truk Lagoon dive liveaboards table

This list of Truk Lagoon liveaboards is in descending customer rating order, followed by Scuba Diving Luxury Rating (SDE Lux Rating, see below), so the liveaboards with the highest customer rating and the best SDE lux rating will be at the top of the list. If you want to change the list order, use the “Sort by” dropdown below.

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Total Records Found: 2, showing 10 per page
Liveaboard main photoDiscover LiveaboardCustomer Review (Max 10)SDE Lux Rating %Flexible BookingDive CoursesDietary RequirementsNitroxGear Rental
Review Link: SS Thorfinn; Booking Link: SS Thorfinn 8.8 88% YES YES YES YES YES
Review Link: MV Truk Master; Booking Link: MV Truk Master 7.9 65% YES NO YES YES YES

The Scuba Diving Earth Luxury Rating (SDE Lux Rating) is explained on each liveaboard review when you click the “Discover Liveaboard” link, and is my own Liveaboard Luxury Rating I’ve assigned to all liveaboards. Choosing between liveaboards is helped by customer scores, and if you get stuck choosing between two or three liveaboards, where each one has a high customer score out of 10, you can use the SDE Luxury Rating to help narrow down your choice.

Think about it like using Booking.com when searching for the best hotel. Booking.com also use a customer score where each customer rates hotels out of 10. This is similar to the liveaboard customer rating, which is also rated out of 10. But let’s say you only like to stay in hotels rated 8 and above on Booking.com, but you also want the hotel to have WIFI or parking, or to have a swimming pool etc. The features each hotel has is usually secondary to the score out of 10.

Details of Heian Maru the largest Truk Lagoon wreck

  • Heian Maru was a Japanese ocean liner launched in 1930.
  • Heian Maru was a converted submarine tender.
  • Weight of 11,614 tons.
  • She was 155 metres (510 feet) in length.
  • Had a beam of 20 metres (66 feet).
  • The Heian Maru is the largest of all the Truk Lagoon Wrecks.
  • Maximum dive depth of 34 metres (110 feet).
  • Minimum dive depth of 15 metres (50 feet).

The word ‘Maru’ in Japanese ship naming protocol designates a merchant vessel. Ironically the Heian Maru operated NYK line’s trans-Pacific service between Yokohama and Seattle, USA before the war.

It was only just before the outbreak of the Pacific War of World War II that this commercial liner was requisitioned by the Imperial Japanese Navy to be converted into an auxiliary submarine tender.

Comments on Heian Maru ship wreck

  • Largest wreck in Truk lagoon.
  • Heian Maru has a large deck gun on the stern.
  • She lies 457 metres (500 yards) west of Tonoas (Dublon).
  • To see the location of the Heian Maru on a map, please follow this link to: Truk Lagoon wreck map.
  • A passenger-Cargo Ship, she was built in 1930 at a cost of $15,000,000 (which in today’s terms would be $227,000,000!).

To understand more about what happened at Truk Lagoon, please take a read of this article what happened at Truk Lagoon in 1944.

Heian Maru Truck Lagoon wreck video

This is a video of Heian Maru truck Lagoon wreck.

The Heian Maru Wreck – Truk Lagoon, The Ghost Fleet. Operation Hailstone
The Heian Maru – one of the largest wrecks to be found in the waters of Truk (Chuuk) Lagoon at a length of 155m. Built in 1930 as a Passenger-Cargo Ship with interior decoration designed in the “old English” style she was considered a major innovation in ships at the time with the high standards of decoration carried out in the ship’s lounge, reading room, writing room, and dining salon. On her maiden voyage, she set a trans-Pacific speed record on a trip to Seattle. Seattle shippers spread the word through the media that the arrival of the new ship might be regarded as a gesture of friendship from the business interests of Japan. Following this theme of friendship, the ship’s owners opened up the Heian Maru to the public, letting nearly 15,000 people tour the vessel. The crowds were so great that hundreds had to be turned away. She was converted into a Navy submarine tender in 1941, and was an integral part of the 6th Submarine Fleet initially based in Kwajalein, and subsequently stationed at Truk.

I hope you enjoyed this article about Heian Maru ship wreck of Truk Lagoon

I’d love to hear from you. Tell us about your adventures of diving and snorkeling, in the comments below. Please also share your photos. Either from your underwater cameras or videos from your waterproof Gopro’s!

If this article hasn’t answered all of your questions. If you have more questions either about snorkeling or scuba diving (or specifically about Heian Maru wreck of Truk Lagoon), please comment below with your questions.

There will also be many more articles about scuba diving (and snorkeling) for you to read and learn about these fabulous sports.

Have fun and be safe!

Heian Maru Wreck Of Truk Lagoon (Details Of Truk Lagoon Wrecks)

Article written by Russell Bowyer who has been a scuba diver since diving on the Great Barrier Reef in Australia in 1989. After his first dive he trained as a BSAC diver in the UK. He attained his Diver Leader certification with BSAC. He then went on to become a scuba diving instructor, teaching others how to dive and was voted as Diving Officer and Treasurer for the Saffron Walden BSAC club too. Russell has dived all over the world, including the UK, on liveaboards in the Red Sea, the Caribbean, South Africa and the USA. Russell is experienced in all dive types, including drift diving, deep dives that involved decompression stops and recreational dives too.

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