HMAS Steady Hour (12) was formerly a luxury motor cruiser, commissioned as a channel patrol boat and operated by the Royal Australian Navy (RAN) during the Second World War.

Steady Hour was armed with .303 Vickers machine guns fore and aft and depth charge racks on the stern.

[2][3] Following the Battle, it appears Steady Hour spent a considerable period of time in Sydney, before relocating to Port Kembla in November 1943.

In April 1944, she was refitted in Sydney, (458) and arrived in Darwin via Thursday Island and Melville Bay on 22 May 1944 in company with HMAS Seamist.

The subsequent Board of Inquiry recorded their appreciation of the action taken by Percy Allan, a sailor from Seamist who despite being unable to swim, dived into the shark infested waters to rescue Leading Seaman Piper.