On This Day - 25 September
- A battery of two guns was established on Garden Island, to protect Sydney from a French attack.
The garrison of 12 Marines was commanded by Henry Hacking.
- Royal Naval House, Sydney, was officially opened by His Excellency, Lord Carrington, Governor of NSW.
- The auxiliary minesweeper HMAS DOOMBA, was commissioned. DOOMBA, (as HMS WEXFORD), was laid down in the UK in 1919. She was requisitioned for the RAN, from her owners, the Doomba Shipping Co, Brisbane, on 3 September 1939.
- HMAS SYDNEY, (cruiser), patrolled south of Cyprus with HMS PROTECTOR, in search of a Vichy French transport bound for Beirut.
Two shells from the French Ship RICHELIEU, (battleship), struck HMAS AUSTRALIA, (cruiser), during a bombardment of French units in Dakar. AUSTRALIA lost her Walrus amphibian, which was shot down, and lost with its crew.
- HMAS VOYAGER, (destroyer), arrived home at Sydney for a refit.
- HMAS VOYAGER, (destroyer), was lost in Betano Bay, Timor, due to grounding and enemy action. 2 ratings lost their lives
- The Fremantle-based USS BOWFIN, (submarine), sank the Japanese transport KIRISHIMA MARU in the South China Sea.
- CAPT C. A. G. Nichols, RN, relieved CAPT Showers in command of HMAS SHROPSHIRE, (cruiser). CAPT Showers took up the appointment of 2nd Naval Member of the Australian Naval Board.
- HMAS IPSWICH, (Fremantle class patrol boat), was launched at Cairns, QLD
'On This Day' is based on the book "Navy Day by Day: Historic Naval Events in Australia and Abroad" written by the late Lew Lind. More information.