HMAS Platypus (naval base)

HMAS Platypus
North Sydney and Neutral Bay, Sydney, New South Wales in Australia
HMAS Platypus Location in New South Wales
Coordinates	33°50′35″S 151°13′02″E / 33.842966°S 151.217182°E / -33.842966; 151.217182
Type	Submarine base
Site information
Owner	Department of Defence (1967 – 2005); Sydney Harbour Federation Trust (2005 – present)
Operator	Royal Australian Navy (1967– 1999)
Open to the public	Since May 2018
Site history
In use	18 August 1967 (1967-08-18)– 14 May 1999 (1999-05-14)
Fate	Decommissioned; After remediation and refurbishment, open to the public since May 2018
Garrison information
Garrison	Royal Australian Navy Submarine Service
Occupants	Australian Fourth Submarine Squadron RAN Torpedo Maintenance Establishment

HMAS Platypus is a former Royal Australian Navy (RAN) submarine base, located at 118 High Street, North Sydney with moorings in Neutral Bay, a suburb of Sydney in New South Wales, Australia. It was located upon the site of the Royal Australian Navy Torpedo Maintenance Establishment (RANTME), it built on the site of the former North Sydney Gas Works that operated on the site from 1877 and resumed by the Commonwealth in 1942.^[1] The Fleet Intermediate Maintenance Activity (FIMA) Workshops building on the site was originally used for torpedo assembly and storage during World War 2. It was later modified for submarine maintenance and repair, with a steel tower added to the northern end of the building for testing, cleaning and maintenance of periscopes.