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.
i don't know