Researching destinations and crafting your page…
The Iro Maru stands as Palau's most iconic WWII wreck, a 143-470-foot Japanese Navy oiler sunk by bombs on March 31, 1944, during Operation Desecrate One, resting upright in 28-40 meters south of Koror.[2][3][4][7] Its intact structure—masts, gun turrets, decks laden with oil drums and machinery—blends stark wartime history with a vibrant artificial reef exploding in corals and sea life.[1][3] This transformation from war relic to marine sanctuary sets it apart, drawing wreck enthusiasts worldwide for penetrable interiors and abundant sightings unmatched in the Pacific.[1][4]
Prime dives circle the upper deck at 8-28 meters for corals, clownfish, pipefish, and cuttlefish, then penetrate deeper for turtles and eagle rays amid the hull.[1][4] Multi-dive strategies explore forward tower, main deck, and engine room, with boat access from Koror operators.[1][3][5] Nearby wrecks like Amatsu Maru complement itineraries for epic wreck weeks.[3]
Dive year-round in 26-27°C waters with air at 26-30°C, though December to March delivers peak visibility of 10-30 meters and minimal rain over June-July wet peaks.[1][4] Expect light currents, variable viz, and depths requiring Nitrox and wreck skills; currentsuits advised for drift elements.[1][5] Prepare with certified guides to navigate ammo hazards and respect no-touch policies.[4][6]
Palau's dive community reveres the Iro Maru as a protected testament to WWII, with local operators emphasizing conservation amid growing marine vibrancy.[3] Divers connect through shared stories of its history, fostering respect for the site's role in Pacific heritage. Operators like Fish 'n Fins integrate cultural briefs, highlighting Palauan stewardship of these wrecks as living reefs.[4]
Book dives through Koror-based operators like Fish 'n Fins or liveaboards such as Black Pearl for guided access, as the site lies south of Koror in Urukthapel Anchorage. Plan for advanced open water certification with wreck specialty due to depths of 28-40 meters and potential light currents. Schedule during dry season December to March for optimal visibility and conditions; reserve 2-3 days for multi-level dives on bow, deck, and interior.[1][4]
Arrive with certification cards and logbook for quick operator approval, and complete a thorough buddy check before boat descent. Pack reef-safe sunscreen, motion sickness meds for the short ride from Koror, and a surface marker buoy for safety in variable visibility. Brief on no-touch rules for live ammo and marine life to preserve the site.[4][6]