Nippo Maru
Chuuk Lagoon · Federated States of Micronesia
Japanese armed water and supply transport sunk during Operation Hailstone in February 1944. She sits upright with a list to port, holds packed with war materiel — artillery shells, sea mines, gas masks and crockery. A Japanese light tank still rests on the deck and three field howitzers lie aft; the bridge telegraph and ship’s helm remain in place. Hard and soft coral now sheath the railings, with the shallowest mast around 21 m and the deck near 30 m.
Conditions
Depth
21 to 42 m
Advanced depths
Current
Usually gentle
Can pick up on the edge
Visibility
15 to 25 m
Clearest in the calm season
Water
28 to 30°C
Tropical wetsuit
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Vis (m) | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 |
| Current | Gentle | Gentle | Gentle | Gentle | Gentle | Gentle | Gentle | Gentle | Gentle | Gentle | Gentle | Gentle |
Your chances of seeing each animal
Glassfish
Last confirmed Apr 15, 2026 · 130 records
Almost always
Nearly every dive
Batfish
Last confirmed Feb 10, 2025 · 1 records
Likely
About 6 in 10 dives
Pacific Golden-Plover
Last confirmed Jun 28, 2026 · 16 records
Likely
About 6 in 10 dives
Micronesian Myzomela
Last confirmed Jun 28, 2026 · 15 records
Likely
About 6 in 10 dives
Lionfish
Expected
Known here, not yet in recent logs
Whitetip reef shark
Expected
Known here, not yet in recent logs
Peacock Damsel
Expected
Known here, not yet in recent logs
Bluefin Trevally
Expected
Known here, not yet in recent logs
Gear