Meet the site
RMS Australia was the biggest ship ever lost at Port Phillip Heads and the most public. She was a P&O Royal Mail steamer, a steel screw liner of about 6,900 gross tons built by Caird & Co at Greenock in 1892, 142 m long, with accommodation for 265 first-class and 140 second-class passengers and the fittings of her era – marble baths, mahogany staircases. At 1.45 on the morning of 20 July 1904, inbound from London at 14.5 knots, she struck Corsair Rock. Her pilot was later found to be suffering from Bright's disease, which had affected his eyesight. Everyone aboard was taken off safely, but the ship could not be moved, and a fire of unexplained origin gutted what remained and burned for five days. Salvors stripped her over the following years, and in 1911 the remains were blasted to clear a passage for fishing boats.
What is left is a debris field roughly 300 m long on the shallow Nepean reef, in 3–8 m of water. The Scuba Doctor listing describes the hull as collapsed by explosives and time, with the boilers, crankshaft, propeller shaft and sections of hull 'lying exposed on the bottom in a rough north to south line'. The steel is covered in kelp and coralline algae rather than the sponge gardens of the walls, and the fish are those of the surf zone – sweep, wrasse, zebrafish – with crayfish under the plates and seals from Point Nepean passing through.
The listing calls the dive 'extremely dangerous and difficult' and best at very low tide, and that is the reality: this is a shallow reef at the throat of The Rip, breaking in any swell, with the ebb setting out to sea over it and the flood forming whirlpools around Corsair Rock 180 m away. It is dived rarely, by experienced club divers on the flattest days at ebb slack, and is of interest mainly to wreck historians. A protected historic shipwreck; nothing may be removed.
Research this site before booking Stored site notes may be historical. These questions highlight gaps without turning old instructions into a current dive plan.
RMS Australia is recorded as Wreck in Port Phillip Heads. The listed access is boat. Confirm the actual meeting point, route and permission to visit; a map pin does not establish any of these.
Topics flagged by the stored research
These are questions prompted by the existing notes, not a verified or complete hazard assessment.
- Other water users
- Ask about vessel activity, exclusion areas and the agreed surface arrangements.
- Water movement
- Ask how swell and local exposure affect the proposed entry, exit and route.
Historical access notes exist for this record, but have not been independently verified for current use. Request current directions from the operator or site manager rather than following an old entry description.
Questions, answered
Is RMS Australia suitable for my certification?
The record lists Advanced Open Water. That does not establish suitability for every route or day. Share your training, recent experience and equipment needs with the operator and ask about the specific proposed dive.
Can I book RMS Australia through YouDive?
YouDive is an independent research directory. Contact an operator directly to confirm whether it currently runs the trip, the inclusions and the booking terms.
What you might see
Kelp and coralline algae, silver sweep, bluethroat wrasse, zebrafish, southern rock lobster, abalone, Australian fur seal
Location
Scattered over about 300 m of the shallow Nepean reef near Corsair Rock at the entrance to Port Phillip, 179 m south-east of the Corsair Rock mark.
Before you make plans
Conditions, access and operator schedules can change. This is a location guide, not a dive plan. Ask a local operator about current conditions and suitability for your training and experience.
Sources & further reading
scubadoctor.com.auscubadoctor.com.auen.wikipedia.orgscubadoctor.com.auRecord updated 26 Sept 2026. Source claims are being reviewed.
