Okikawa Maru
Depth is the range from the top of the site to its usual maximum; "recommended cert" is the mainstream-agency level operators usually ask for, not a legal rule. Currents and visibility change daily — treat everything here as planning ranges.
The Okikawa Maru, an oil tanker on the order of 160 m, is the friendliest big ship in Coron: her main deck lies at just 10-16 m, shallow enough for long, unhurried laps of a hull that seems to go on forever. Corals and anemones have colonized the deck fittings so thoroughly that parts read as reef, patrolled by batfish, sweetlips, and turtles. The bow section, mangled by the 1944 attacks and later salvage, makes dramatic wide-angle scenery, and trained divers can thread the propeller-shaft tunnel and pump spaces. Generous light, generous time; many divers log their first-ever wreck penetration here.
The moment you come for: Shallow sprawling tanker deck, coral-and-anemone overgrowth, approachable first penetrations
Topography: Nearly upright hull on sand around 26 m
Current: More exposed than the inner bay wrecks; current over the deck is common and occasionally calls the dive.
Entry: Moored off Concepcion on Busuanga's west side; the longest boat ride of the main fleet from Coron town.
Know before you splash
Hazards: Current over the deck, entangling lines near the bow wreckage, and silt in the shaft tunnel.
Conservation: Part of the protected 1944 fleet; no artifact recovery, no souvenir chipping.
Nitrox: Worth it here — profiles sit in the range where enriched air meaningfully extends no-stop time (with the training to use it).
Who you'll meet
Clownfish & Anemonefish
Hawksbill Turtle
Lionfish
Nudibranchs
Oriental Sweetlips
Pinnate Batfish
For photographers
Wide angle: ★★★★★ · Macro: ★★★☆☆ — editors' 1–5 rating of what this site gives each style of shooting