
Keiten Maru
Rabaul · Papua New Guinea
The Keiten Maru is considered the most accessible wreck in Simpson Harbour, sitting upright in just 12 to 28 meters with its upper superstructure reaching well into recreational snorkelling depth. The relatively shallow maximum depth and gentle currents within the sheltered harbour make it an ideal introduction to wreck diving in Rabaul, yet the enormous schools of anthias and fusiliers cascading over the stern reward experienced divers equally. Artillery pieces remain on deck and the engine room is accessible with basic wreck-penetration training.
Conditions
Depth
5 to 28 m
Open water and up
Current
Usually still
Can pick up on the edge
Visibility
20 to 30 m
Clearest in the calm season
Water
26 to 30°C
3mm wetsuit
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 28 | 28 | 28 | 28 | 27 | 26 | 26 | 26 | 27 | 27 | 28 | 28 |
| Vis (m) | 10 | 10 | 12 | 15 | 18 | 20 | 20 | 20 | 18 | 15 | 12 | 10 |
| Current | Gentle | Gentle | Still | Still | Still | Still | Still | Still | Gentle | Gentle | Gentle | Gentle |
Your chances of seeing each animal
Spine-Cheek Clownfish
Last confirmed Mar 16, 2026 · 1 records
Rare
Now and then
Reef Stonefish
Last confirmed Jul 5, 2025 · 1 records
Rare
Now and then
Clark'S Anemonefish
Last confirmed Mar 3, 2026 · 2 records
Rare
Now and then
Lyretail Anthias
Expected
Known here, not yet in recent logs
Giant Moray
Expected
Known here, not yet in recent logs
Banded Sea Krait
Expected
Known here, not yet in recent logs
Oceanic Triggerfish
Expected
Known here, not yet in recent logs
Blackspotted Puffer
Expected
Known here, not yet in recent logs
Gear