A dive on the recently discovered wreck of (ex) HMAS Pioneer, in 67m off Sydney, Australia.
Built for the Royal Navy, Pioneer became part of the Australian Navy before the first world war, and, although already basically obsolete by the outbreak of hostilities, according to legend fired more shots in anger than any other Australian ship. She was scuttled in 1931, and her wreck was rediscovered in March 2014.
A history of the Pioneer is here: navy.gov.au/hmas-pioneer. Information about the discovery and the discoverers can be found here: nswwrecks.info/Current%20News.html and confirmation of the identity here: damiensiviero.com/new-wreck-found-ex-hmas-pioneer/
Filmed using a Sony NEX-5n with 10-18mm lens in a Nauticam housing and twin Mangrove video lights (underwater), and a Sony RX100 topside.