DivePlnr
    CHIDAI MARU NO 25 dive site
    wreck
    2m
    Yap, Micronesia

    CHIDAI MARU NO 25

    Best months: Dec–Apr

    Why dive here

    With 297+ marine species recorded in the area - including barracuda, blacktip reef sharks, giant moray eels, grey reef sharks and seahorses - CHIDAI MARU NO 25 offers some of Yap's richest wreck diving. Water ranges 29-30°C, warmest June, July, October.

    Best timeDec–Apr
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBarracuda, Blacktip Reef Sharks, Giant Moray Eels, Grey Reef Sharks and Seahorses · 297+ species recorded
    Water29-30°C · warmest June, July, October
    CharacterWreck dive · max 2m
    StandoutExceptional marine biodiversity

    The Chidai Maru No. 25 isn’t your typical deep Yap wreck. Forget the big swim-throughs and the thermoclines. This Japanese tanker ran aground on Ngulu Atoll, and she now sits right on the surface, her hull and superstructure breaking the water. We love this site for its sheer accessibility, a true snorkel-and-chill wreck dive. You’re exploring a shipwreck that’s practically an island, with the sun streaming through the shallow water illuminating every rivet. We’ve seen small reef sharks patrolling the shadows of the bow, and a kaleidoscope of reef fish darting in and out of the rusted metalwork. Our favourite part? Peeking into the exposed engine room from above, watching the light play on the submerged machinery. This spot is perfect for photographers who want ample natural light, or anyone who enjoys a leisurely drift over history without the need for heavy gear. Just grab your mask and fins, and you’re set for a proper look at a piece of wartime history.

    Typical CHIDAI MARU NO 25 Dive Profile

    Safety Stop0m2m max~60 min estimated bottom time

    Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.

    Safety Notes

    Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.

    Today05:3817:3711h 59m daylightGolden hour 17:09

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    Conditions

    Ocean conditions, forecast and tides for CHIDAI MARU NO 25

    CHIDAI MARU NO 25 Ocean Conditions

    Monthly averages for CHIDAI MARU NO 25, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (9.45, 138.07) (4km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    30°C

    86°F · Range: 29.3–31.2°C

    Air Temperature

    28°C

    82°F

    Wind Speed

    6.93 m/s

    13.5 knots

    Atmospheric Pressure

    1008.9 hPa

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data

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