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J Class Submarine Wreck Dives

Chart location of J class submarines

When they were built in 1917, the seven J class submarines were the fastest in the world with a surface speed of 19 knots and a submerged speed of 10 knots. The J6 was lost during WW1, and the remaining six submarines were gifted from the British government to the Royal Australian Navy in 1919.

In 1924 the J1, J2, J4 and J5 submarines were sold to a salvage company that stripped them of valuable materials and then scuttled them outside of The Heads in 1926.

The J3 was sunk at Swan Island for use as both a jetty, and a power source for the military base. The J7 was sunk as a breakwater at the Sandringham Yacht Club.

J1 Deep Submarine

Wreck Dive Boat access
Deep Rated Outside Port Phillip Bay Wreck Dive Site
Latitude: 38° 18.959′ S   (38.315988° S / 38° 18′ 57.56″ S)
Longitude: 144° 33.219′ E   (144.553648° E / 144° 33′ 13.13″ E)
Datum: WGS84 Google Map
Added: 2012-07-22 01:00:00 GMT, Last updated: 2019-05-09 01:48:44 GMT
Source: Book - Victoria's Ships' Graveyard GPS (verified)
Nearest Neighbour: New Deep Bommie, 1,157 m, bearing 101°, E
J-Class Submarine, 1820 ton.
Built: Portsmouth, UK, 1915/1916.
Scuttled: 26 May 1926.
Depth: 31 to 38 m.
See the J1 Deep Submarine dive site page

J2 Broken Submarine

Wreck Dive Boat access
Deep Rated Outside Port Phillip Bay Slack Water Subject to Shipping Wreck Dive Site
Latitude: 38° 18.814′ S   (38.31357° S / 38° 18′ 48.85″ S)
Longitude: 144° 34.803′ E   (144.580048° E / 144° 34′ 48.17″ E)
Datum: WGS84 Google Map
Added: 2012-07-22 01:00:00 GMT, Last updated: 2019-03-20 05:41:31 GMT
Source: Book - Victoria's Ships' Graveyard GPS (verified)
Nearest Neighbour: Lost Reef, 430 m, bearing 154°, SSE
J-Class Submarine, 1820 ton.
Built: Portsmouth, UK, 1915/1916.
Scuttled: 1 June 1926.
Depth: 31 to 39 m.
See the J2 Broken Submarine dive site page

J3 Swan Island Submarine

Wreck Dive Boat access
Inside Port Phillip Bay Wreck Dive Site
Latitude: 38° 14.640′ S   (38.244° S / 38° 14′ 38.4″ S)
Longitude: 144° 42.120′ E   (144.702° E / 144° 42′ 7.2″ E)
Datum: WGS84 Google Map
Added: 2012-07-22 01:00:00 GMT, Last updated: 2019-03-23 02:05:23 GMT
Source: GPS
Nearest Neighbour: S.F. Hersey, 149 m, bearing 185°, S
J-Class Submarine, 1820 ton.
Built: Dyfed, Wales, 1916.
Scuttled: January 1926.
Depth: 0 to 8 m.
See the J3 Swan Island Submarine dive site page

J4 26m Submarine

Wreck Dive Boat access
Advanced Open Water Rated Outside Port Phillip Bay Wreck Dive Site
Latitude: 38° 17.979′ S   (38.299657° S / 38° 17′ 58.77″ S)
Longitude: 144° 33.820′ E   (144.563673° E / 144° 33′ 49.22″ E)
Datum: WGS84 Google Map
Added: 2012-07-22 01:00:00 GMT, Last updated: 2019-05-09 01:49:08 GMT
Source: Book - Victoria's Ships' Graveyard GPS (verified)
Nearest Neighbour: Sub Reef, 440 m, bearing 95°, E
J-Class Submarine, 1820 ton.
Built: Portsmouth, UK, 1915/1916.
Scuttled: 28 April 1927.
Depth: 19 to 28 m.
See the J4 26m Submarine dive site page

J5 Yellow Submarine

Wreck Dive Boat access
Deep Rated Outside Port Phillip Bay Wreck Dive Site
Latitude: 38° 18.649′ S   (38.310822° S / 38° 18′ 38.96″ S)
Longitude: 144° 34.118′ E   (144.568632° E / 144° 34′ 7.08″ E)
Datum: WGS84 Google Map
Added: 2012-07-22 01:00:00 GMT, Last updated: 2019-05-08 07:18:45 GMT
Source: Book - Victoria's Ships' Graveyard GPS (verified)
Nearest Neighbour: Coogee, 520 m, bearing 31°, NNE
J-Class Submarine, 1820 ton.
Built: Portsmouth, UK, 1915/1916.
Scuttled: 1 June 1926.
Depth: 25 to 36 m.
See the J5 Yellow Submarine dive site page

J7 Submarine

Wreck Dive Shore access
Inside Port Phillip Bay Wreck Dive Site
Latitude: 37° 56.683′ S   (37.944722° S / 37° 56′ 41″ S)
Longitude: 144° 59.600′ E   (144.993333° E / 144° 59′ 36″ E)
Datum: WGS84 Google Map
Added: 2012-07-22 01:00:00 GMT, Last updated: 2019-03-23 02:17:08 GMT
Source: GPS
Nearest Neighbour: Sandringham Pier Breakwater, 101 m, bearing 88°, E
J-Class Submarine, 1820 ton.
Built: Dyfed, Wales, 1916.
Scuttled: 6 August 1930.
See the J7 Submarine dive site page


DISCLAIMER: No claim is made by The Scuba Doctor as to the accuracy of the dive site coordinates listed here. Should anyone decide to use these GPS marks to locate and dive on a site, they do so entirely at their own risk. Always verify against other sources.

The marks come from numerous sources including commercial operators, independent dive clubs, reference works, and active divers. Some are known to be accurate, while others may not be. Some GPS marks may even have come from maps using the AGD66 datum, and thus may need be converted to the WGS84 datum. To distinguish between the possible accuracy of the dive site marks, we've tried to give each mark a source of GPS, Google Earth, or unknown.

If you don't understand the differences between the different ways coordinates are given, plus how different datum come into play, you might find the article GPS Conversions by Lloyd Borrett a useful read. It describes the problems associated with locating dive sites using a GPS receiver.

GPS latitude explained


Scuba Doctor Dive Map KML File

In the true spirit of making it easy to obtain, utilise and share the information for non-commercial purposes, you can now Download/view the Scuba Doctor Dive Map GPS Marks (KML file | 250.79 KB | 16-Jun-2019) in the Keyhole Markup Language (KML) file format used to display geographic data in an Earth browser such as Google Earth and Google Maps.

Some marine GPS units can import the information from a KML file. For others you can use use a file translate program (e.g. GPSBabel) to convert the KML file into an import file format (e.g. GPX) supported by your GPS unit.


Please Help Us To Correct GPS Marks and Add More Melbourne Dive Sites

If you have have information about other dive sites you'd be happy to see added to the information available here, or any corrections and/or updates to the diving site GPS marks listed here, please feel free to Contact Us. See also, Dive Site Help.

Copyright in photographs and other materials used here remains with their artists and authors. We are happy to acknowledge appropriate copyrights should they be made known to us.

Bass Strait Warning

If you intend to go scuba diving and/or boating in Bass Strait you must be appropriately trained and qualified. Always analyse the weather forecasts and make your own mind up about what you consider to be safe conditions. We accept no responsibility or liability for the accidental or intentional misuse of information portrayed, or misadventure resulting from its use.

We recommend you don't go diving in Bass Strait if any of the following conditions are likely to occur within a 24 hour period:

  • A Strong Wind Warning (or above - Gale, Storm, Hurricane) has been issued by the Bureau of Meteorology for Port Phillip Bay and/or Bass Strait (Central Coast);
  • Wind strength exceeding 20 knots (37 kpm) from the direction: NW, NNW, N, W, NE, NNE;
  • Wind strength exceeding 15 knots (28 kpm) from the direction: SW, SSW, S;
  • Wind strength exceeding 10 knots (19 kpm) from the direction: SE, SSE, E;
  • Swell Height exceeding 2 metres (6.6 feet);
  • Any swell exceeding 1 metre (3.3 feet) with a period less than 5 seconds;
  • A weather change is due which may cause any of the above conditions to occur.

Scuba diving is an inherently dangerous activity and appropriate training and experience in scuba equipment, decompression diving, deep diving, mixed gas diving and wreck penetration diving are all mandatory skills for safely diving the wrecks of Bass Strait.

Suunto D5 at The Scuba Doctor Dive Shop

Never hang your dive gear on the line of fire.
— Old diver's proverb