The HMAS "Platypus" was ordered to support which submarine that ended up getting lost at sea in 1914?
HMAS AE1: HMAS "AE1 (originally known as just AE1") was an "E"-class submarine of the Royal Australian Navy (RAN). HMAS AE1:  She was the first submarine to serve in the RAN, and was lost at sea with all hands near East New Britain, Papua New Guinea, on 14 September 1914, after less than seven months in service.
i don't know