Film about a destroyer on manoeuvres off the coast of Australia.
Full titles read: "AUSTRALIA'S JOLLY JACK TARS (Filmed and described by Commander Harry T. Bennett). At Sea on A Destroyer."
L/S's of crew members on the deck of the destroyers. L/S's of smoke billowing out from boxes at the bow of the ship; the narrator says that this is the ship's "best form of defence" as the fog like smoke helps to "seal the gap between the funnel smoke and the sea."
Various shots (including good slow motion footage) of torpedoes being launched from the ship into the sea. The narrator informs us that after practising firing torpedoes the ship turns and follows them in an attempt to recover them as they each cost 2000 pounds.
M/S's and L/S's of a crew of sailors being lowered into the sea to collect a torpedo. M/S of a torpedo being lifted back on onto the ship by winch. Various shots of the destroyer moving into the harbour to dock.