Several ships and shore establishments of the Royal Australian Navy have been named HMAS Platypus:
Platypus was a submarine depot ship built for the Royal Navy as Penguin in 1917, transferred to the RAN in 1919 and scrapped in 1958.
Platypus was a submarine shore base on Sydney Harbour between 1967 and 1999.
This article includes a list of ships with the same or similar names. If an internal link for a specific ship referred you to this page, you may wish to change the link to point directly to the intended ship article, if one exists.