San Francisco Maru

San Francisco Maru: the 'million dollar wreck', named for its cargo. The tanks on deck sit near 50m and the hull bottoms out around 64m, so this is technical decompression diving only, not a recreational dive.

Depth

42–64m

Current

Mild

Diver level

Tech required

Entry

Boat

Unique features

Three battle tanks on the deck at around 50m: Truk's most famous deep sight
Deck at 42m, seabed near 62 to 64m: a decompression, mixed-gas dive
Holds of mines, trucks and munitions; trimix or CCR recommended

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.

A Wreck in Depth - The San Francisco Maru — The Dirty Dozen Expeditions

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