Michael McFadyen's Scuba Diving Web Site
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Kelly Talking on ABC Sydney about Shipwrecks
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Dive Related Equipment
Shearwater Predator and Heinrichs Weikamp OSTC 2N
Uwatec Aladin Dive Computers
Apollo AV1 Underwater Scooter
Bauer Compressor
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Purchase of New Dive Boat
My Dive Boat - Mak Cat
My Old Dive Boat - Le Scat
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Make Your Own Car Tank Rack

Marine Life
Rarer Sydney Marine Life
Bare Island Pygmy Pipe Horses
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Bare Island Marine Life
Encounter with Southern Right Whale and Calf

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How Weather Affects Diving in Sydney
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Noel Hitchins 1951-2005
Lloyd Bridges - Mike Nelson in Sea Hunt
My Yachting Adventures
Below is a list of links to the main pages about my yacht, Catlypso and My Yachting Adventures:
  • Purchase of Catlypso
  • Details about Catlypso
  • Cleaning/Repairing Catlypso
  • My Yachting Adventures.
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    Michael's 4WD Trips
    Click here for a list of my Four Wheel Drive and Camping Trips.
    Home Brewing
    Click here for an article about Home Brewing.
    Sydney Dive Site Hints
    "The Leap is named after the high jump into the water to start the dive"
    Olympia Maru
    Michael McFadyen's Scuba Diving - Olympia Maru Launched in August 1927 from the Nagasaki shipyards of Mitsubishi Zosen Kaisha Ltd, the Olympia Maru was 122 metres long and almost 17 metres wide, displacing 5612 tons. The ship was originally powered by a steam engine but during 2 June to 2 August 1930, an oil two stroke six cylinder engine producing 582hp was installed. The ship was built for Mitsubishi Shoji Kaisha Ltd and was owned by them right up till it sank (it was requisitioned by the Japanese Defence Forces during the War but was still owned by Mitsubishi Shoji Kaisha Ltd). I do not know anything else about this ship yet.

    Olympia Maru
    A pre-war photo of the Olympia Maru
    In late September 1944 with some Japanese ships, including a convoy of 12 Japanese ships, taking refuge in the Busuanga Island area of the Northern Palawan group of the Philippines. Eight of the ships were anchored in Coron Bay, the rest to the west and at least one on the northern side of Busuanga Island. The Olympia Maru was anchored off the western side of Tangat Island.

    Late on the afternoon of 23 September 1944, Fast Carrier Task Force (TF) 38 under the command of Vice Admiral "Bull" Halsey positioned itself for an attack on the ships in the Coron area. At 5.50 am on 24 September 1944, 180 Grumman F6F Hellcat and Grumman SB2C Helldiver planes lifted off the American and headed off on the 350 kilometre flight for the waters of Coron Bay. This was to be the longest carrier based (and return) attack ever carried out. At 9 am the planes reached Coron and located at least 18 large Japanese vessels and started their attack.

    The planes attacked the ships in Coron Bay and the ships to the west first. After a frenzied 45 minute attack the planes left, leaving behind numerous sunken ships. It is reported that the Olympia Maru was attacked by 10 aircraft and the fourth apparently scored a direct hit amidships, perhaps on a fuel tank, and the engine was disabled.

    It is reported that at 1:30 pm there was a raging fire. The ship started sinking and at 2:26 pm she went down stern first, taking with her 19 Japanese sailors. Most of the ships anchored around Coron were also sunk. Today 14 of these wrecks have been located and most can be dived from Coron. See my Coron Page for more information.

    This wreck used to be more popularly known as the Tangat Wreck as it lies a few metres off the south-western side of Tangat Island. It was also known as the Morazan Maru. For a while, it was also thought to be the Ekkai Maru, formerly SS Morazan. It was also known locally as Morazan Maru or Moruzan Maru. However, the correct name is Olympia Maru. The SS Morazan was sunk in Manila Harbour on 22 September 1944. The ship formerly known at Coron as Olympia Maru is actually the Taiei Maru.

    The ship is quite large, more than 120 metres long. The main deck lies in 18 to 24 metres and the wreck is fully intact lying upright. The bow section is very interesting and the forecastle area quite exciting to explore. Behind this there is a kingpost and then two holds. There is not a enormous amount to see in the holds but there are bits and pieces here and there.

    A banca, used as dive boats, on a beach on Busuanga Island
    Despite the fact that the bridge area is fairly intact, the section of ship above the engine has been dramatically altered from its original. Whether this was from the American attack or later salvaging (or perhaps a combination) was hard to tell on only one dive. Either way, the engine has been salvaged although the boilers are still in good condition. The engine is very open but there are still many areas to explore under and between the boilers.

    Two more holds are found behind the bridge and inside them go can see the prop shaft alley and salvage efforts. Like most (all?) other wrecks here, the prop has been salvaged and it is possible to swim into the shaft and exit inside the hold. The stern section of the wreck also has some smaller compartments that can be entered, but some care is needed. The whole wreck is covered in growth, making the wreck seem like a live reef. Fishlife is also very good, with many schools of large fish swimming over the wreck and between the four kingposts.

    All in all, an excellent shallow dive of a real, Japanese war wreck.


  • Dive Right Coron Web Page
  • Coron History Report by Peter Heimstaedt - Note Mr Heimstaedt emailed me a number of times in the late 1990s telling me that the information I had then on my site about this wreck was wrong but refused my requests for the real information. On his site he has a number of derogoratory remarks about me.

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    Non-commercial use of an article or photograph is permitted with appropriate URL reference to this site.
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    This web site has been wholly thought up, designed, constructed and funded for almost 30 years by Michael McFadyen without any help from the Australian Dive Industry.
    Website created 1996!