The cancelled Australian AOE vessel HMAS Protector which was cancelled in August 1973. She would have been powered by four Rushton and Hornsby 12 AO M diesels for a speed of 20.6kts and carrying 9701 tons of stores, ammunition, diesel fuel, AVCAT, fresh water and food. 335 crewmen would have been carried and two Sea King sized helicopters, although interestingly the plan shows a Frelon on the deck aft.
EDIT: Removed some pixel errors. Detailing is slight but based on what is on plan rather than me speculating. This is actually my first proper auxiliary ship drawing!