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: HMAS "AE1 (originally known as just AE1") was an "E"-class submarine of the Royal Australian Navy (RAN).
i don't know