Trimix Corner

OtherOther | Boat access

Deep Rated Inside Port Phillip Reef Dive Site Slack Water Subject to Shipping Technical Rated

Depth: 30 metres (98 feet) to 103 metres (338 feet)

Trimix Corner is used by some as a starting point for a dive to Entrance Deep, the very deepest known dive spot anywhere in Victoria, being the bottom of the ancient River Yarra just inside the Port Phillip Heads in the main shipping channel.

The actual Entrance Deep spot where 103 metres has been reached is just a 5 metre by 5 metre square target. Starting from Trimix Corner divers descend down the wall looking for the deepest spot they can find. Hopefully they find Entrance Deep, but this approach is not always successful.

At 103 metres deep this is not a dive for the faint hearted. It's very black, barren and rocky, with incredibly treacherous currents. The ascent must be started while the tide is still coming in, slack water is very short, and the ascent must be back up the shot for as long as possible as the outgoing tide will quickly push you back over Rip Bank with a minimum depth of 20 metres. Pick up will be outside Port Phillip Heads.


Trimix Corner Location Map

Latitude: 38° 18.021′ S   (38.30035° S / 38° 18′ 1.26″ S)
Longitude: 144° 38.350′ E   (144.639167° E / 144° 38′ 21″ E)

Datum: WGS84 | Google Map
Added: 2012-07-22 01:00:00 GMT, Last updated: 2019-02-24 05:52:40 GMT
Source: GPS
Nearest Neighbour: Nepean Wall, 28 m, bearing 158°, SSE
Depth: 30 to 103 m.
Dive only on: SWF.

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.

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