Heian Maru
Conditions & tides
Scored by DiveConnect's site-physics model
Marine forecast via Copernicus Marine. Score is a rule-based guide from swell/wind vs. the site's exposure — always dive your own assessment.
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About this site
The Heian Maru is the largest wreck in Truk Lagoon, a former submarine tender lying on its port side at depths of 12 to 34 metres (40 to 110 feet).
The deck is covered in soft corals and sponges, and the cranes and deck guns are still in place, encrusted with marine life. The cargo holds are filled with submarine parts, including torpedoes and periscopes. Divers with penetration training can also explore the engine room.
Schools of trevallies and lionfish live on the wreck, and the occasional reef shark passes.
Marine life here
Confirmed by our research team, reported by independent divers, or observed nearby via iNaturalist — each entry is labelled with its source.
Lined BristletoothCtenochaetus striatusReported here · unconfirmed
Mulloidichthys flavolineatusReported here · unconfirmed
LionfishLionfishReported here · unconfirmed
ParrotfishParrotfishReported here · unconfirmed
NudibranchNudibranchReported here · unconfirmed
TrevallyTrevallyReported here · unconfirmed
Peacock DamselPomacentrus pavoObserved near here · iNaturalist
Bluefin TrevallyCaranx melampygusObserved near here · iNaturalist
Bigeye TrevallyCaranx sexfasciatusObserved near here · iNaturalist
Threadfin ButterflyfishChaetodon aurigaObserved near here · iNaturalist
Durable tips from divers — access, hazards, marine life, facilities. For day-of conditions, use the report tool in the conditions card above.
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