Aikoku Maru

Aikoku Maru: an armed merchant cruiser that exploded during Operation Hailstone. The wreck sits deep, from about 40m to the seabed near 64m, firmly in technical territory.

Depth

40–64m

Current

Mild

Diver level

Tech required

Entry

Boat

Unique features

  • A large armed merchant cruiser, roughly 40 to 64m
  • Blew apart in the raid; bow section is dramatic
  • Deep decompression dive requiring technical training

Sources & last checked

Checked July 2026

This is a researched draft, not yet human-verified. The seasonality and logistics are drawn from the sources below — confirm specifics (permits, fees, closures) with an operator before you book.

Note on the data: Coordinates are approximate; not surveyed dive-site GPS.