The HMAS "Platypus" was ordered to support which submarine that ended up getting lost at sea in 1914?
HMAS Platypus (1917):  Ordered prior to World War I to support the Australian submarines "AE1" and "AE2", "Platypus" was not completed until after both submarines had been lost, and she was commissioned into the Royal Navy from 1917 to 1919. 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