2 Dollars - Elizabeth II 4th Portrait - HMAS AE2 Submarine

HMAS AE2 was one of two submarines Australia dispatched to the Dardanelles campaign in 1915. On April 25 — the same morning as the Anzac landing at Gallipoli — AE2 became the first Allied submarine to force the Straits, a passage the Royal Navy had already failed to navigate multiple times. Her commander, Henry Stoker, kept the boat operational in the Sea of Marmara for five days before a Turkish torpedo boat forced the crew to scuttle her in late April. Stoker and his men spent the rest of the war as prisoners.

The wreck was located in 1998 at roughly 72 metres depth, largely intact.