Michael McFadyen's Scuba Diving Web Site
Home Contact Me Sydney Reef Dive Sites Sydney Shipwrecks NSW Dive Sites Australian Dive Sites Overseas Dive Sites Dive Accidents and Incidents My Yachting Adventures 4WD Trips Weather Search 20 July 2024 07:04

About Me
My Diving
Web Links - Dive Clubs
St George Scuba Club
Some of my Best Photos
Contact Me

Dive Sites
Sydney Reef Dive Sites
Sydney Shipwrecks
Sydney Dive Visibility, Swell and Temps
Kelly Talking on ABC Sydney about Shipwrecks
NSW Dive Sites
Sydney Shipwreck Summary
NSW Shipwreck GPS/Marks
Australian Dive Sites
Overseas Dive Sites
Aircraft I have Dived
Old Bottles
Free Shipwreck Books

Dive Related Equipment
Shearwater Predator and Heinrichs Weikamp OSTC 2N
Uwatec Aladin Dive Computers
Apollo AV1 Underwater Scooter
Bauer Compressor
DIY Oxygen Stick - Nitrox
GoPro HD Hero Video Camera
My Camera Setup
Purchase of New Dive Boat
My Dive Boat - Mak Cat
My Old Dive Boat - Le Scat
My Dive Gear
GPS and Diving
Make Your Own Car Tank Rack

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

Other Dive Info
How Weather Affects Diving in Sydney
Visibility and Wave Averages in Sydney
Waves and Diving
Diving Weather and Sea Conditions
Tide Tables
Dive Accidents and Incidents
Dive Book Reviews
Site Map
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.
  • Login


    Forgotten your password?
    Request a new one here.
    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
    "There are two dive sites at Middle Ground, both are fantastic"
    Michael McFadyen's Scuba Diving - The Trio While most of the wrecks off the Northern Side of Sydney were deliberately scuttled (see other articles) there are a couple of excellent "real" shipwrecks. One of the these is the The Trio, a large barge about 50 metres long. It is located off Mona Vale Beach at a depth of 51 metres. The deck of the barge sits about 5 metres off the sand.

    Some bollards at the bowThe toilet in the bridge area

    Even more interesting about the wreck is that it has a fair sized ferro-cement yacht in the middle hold. In about 1991 the yacht was in pretty good condition but today (late 1990s) it is completely stuffed. The other large rear hold as well as a smaller forward hold is empty and the steering compartment stands right at the stern. Inside the compartment is a toilet. In front of the compartment is a below deck compartment. A large winch and a number of bollards are located at the bow.

    A diagram I drew of the wreck back in 1991

    Just how this wreck came to be located here I am not sure. I now know that the wreck's name really was not The Trio. I still do not know the correct name, so if you do, please let me know. The story I was told is that it was being towed from Pittwater to Sydney Harbour when it sank along with its cargo.

    The Sydney Dive Charters website says this wreck was found by Jason Miles (the owner of Sydney Dive Charters) and Les Rochester after several weeks of wreck hunting with the operator of Aquarius dive in 1989. They could not find any information about this wreck and for that reason the three of them agreed to call it the ‘Trio’.

    Western MarkNorth-western Mark
    Western MarkNorth-western Mark
    The wreck was discovered on 15 July 1988 by Bob Mansfield and two others. Hence the name they gave it, The Trio, since there were three discoverers.

    To find the wreck, travel about 4 kilometres north of the Long Reef wreck site towards Bangalley Head until you are two kilometres off Mona Vale Beach. GPS marks of 33° 41' 01"S 151° 21' 54"E puts you near the wreck (see my GPS Page for details). Line up the Bahai Temple (the white dome on the horizon) above the right-hand side of the top floor tower of Mona Vale Hospital as shown in the drawing at far left. Run out to sea until Barrenjoey Headland appears behind Bangalley Head as shown in the other drawing. Turn your depth sounder on and run slowly back in on the marks. The depth will be 54 to 52 metres and will come up slightly to 51 as the northern mark of Barrenjoey starts to disappear behind the Bangalley Head. Just before it is completely lost, the wreck will show on the sounder, the wreck being 46 metres. Manoeuvre over the wreck and drop anchor. Unless you drop right on the wreck you are unlikely to drag back onto it.

    Only worth a couple of dives every now and again.

    Part of the cement yacht (I think)The bridge

    If you know any more information about The Trio, please email me.


    Photos scanned 2011 from slides taken in 1992 (I think).

    Copyright © Michael McFadyen 1990 to 2024
    Non-commercial use of an article or photograph is permitted with appropriate URL reference to this site.
    Dive shops, dive operators, publications and government departments cannot use anything without first seeking and receiving approval from Michael McFadyen.
    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!