18m
    Beginner
    Cornwall & Devon, United Kingdom
    Chesil Beach and The Fleet

    Bombarden Unit (Wreck)

    Best months: Jul–Sep

    Protected Area

    Chesil Beach and The Fleet

    Why dive here

    With 176+ marine species recorded in the area - including blue sharks, dolphins, dwarf minke whales, humpback whales and ocean sunfish (mola mola) - Bombarden Unit (Wreck) offers some of Cornwall & Devon's richest wreck diving. Water ranges 10-18°C, warmest July, August, September.

    Best timeJul–Sep
    WetsuitA 5mm wetsuit
    Marine lifeBlue Sharks, Dolphins, Dwarf Minke Whales, Humpback Whales and Ocean Sunfish (Mola Mola) · 176+ species recorded
    Water10-18°C · warmest July, August, September
    CharacterWreck dive · max 18m
    StandoutExceptional marine biodiversity

    The Bombarden Unit, resting at a gentle 18 metres, is one of our go-to Cornwall dives when we’re looking for a relaxed exploration. It’s perfect for beginners, but honestly, we find ourselves coming back time and again. We love how much of the wreck is still discernible – not just a pile of plates, you know? You can trace the deck lines, peer into what would have been the holds, and even get a sense of the vessel’s original structure. What makes it special for us is the way the marine life has completely taken over. Big schools of pollack hang suspended over the metalwork, flickering in the shafts of light that pierce the green water. Look closer and you'll spot crabs scuttling amongst the debris, and anenomes clinging to every surface, waving their tentacles in the slight surge. It’s a proper macro playground too, if you’re patient; nudibranchs are always a good find here, camouflaged against the rust. We always try to dive it at slack water, an hour either side of high or low tide, to really take our time exploring without fighting any current. It's an excellent training ground for wreck navigation, or just a really pleasant way to spend an hour underwater.

    Typical Bombarden Unit (Wreck) Dive Profile

    10m20mSafety Stop0m18m max~50 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.

    Always perform a 3-minute safety stop at 5m before surfacing.

    Today06:2617:2811h 2m daylightGolden hour 16:44

    Bombarden Unit (Wreck) Wreck History

    Vessel Type

    barge

    Cause

    unknown

    This is not a traditional shipwreck, but a fascinating and unique piece of World War II history. A 'Bombardon Unit' was a key component of the Mulberry Harbours, the massive floating ports engineered by the Allies for the D-Day landings in Normandy in 1944. These huge, cross-shaped steel structures were designed to be moored offshore to act as floating breakwaters, calming the seas to allow men and material to be offloaded. This particular unit likely broke its tow on the way to France or was lost in a storm and sank in the English Channel.

    Resting at an accessible depth of 18 metres, the Bombarden Unit offers a highly unusual dive. Instead of decks and portholes, divers explore the strange, geometric steel structure, now completely colonized by marine life. It serves as a superb artificial reef, attracting fish and invertebrates, while also standing as a submerged monument to one of the most audacious engineering feats of the war.

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    Conditions

    Ocean conditions, forecast and tides for Bombarden Unit (Wreck)

    Bombarden Unit (Wreck) Ocean Conditions

    Monthly averages for Bombarden Unit (Wreck), sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (50.44, -2.73) (3km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    17°C

    62°F · Range: 15.1–17.5°C

    Air Temperature

    13°C

    56°F

    Wind Speed

    8.14 m/s

    15.8 knots

    Atmospheric Pressure

    1011 hPa

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

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