Motor Launch
23 September 1942
12 September 1945
Dimensions & Displacement
Length 39 feet
Beam 10 feet 6 inches
Draught 3 feet 10 inches
Speed 9 knots
Guns 1 x .303 inch Vickers machine gun
Other Armament 2 x 25lb depth charge

With much of the Royal Australian Navy fleet deployed to foreign waters in the early years of World War II, the defence of Australia’s coastlines became a primary concern for the Naval Board. The Naval Auxiliary Patrol (NAP) was a war-raised unit approved on 25 June 1941, charged with patrolling and safeguarding Australia's inner harbours, ports, rivers and estuaries against enemy sabotage or attack. The NAP fleet was comprised primarily of former pleasure craft, offered freely by their owners.

In May 1942, the NAP was transferred to the Royal Australian Naval Volunteer Reserve (RANVR) and was thereafter known as the RANVR NAP. By October 1942 the total strength of the NAP had increased to over 3000 mobilised and unmobilised reserves. This was to remain the case until early 1944 when it was considered that the danger of enemy attack was remote enough to reduce the strength of the NAP to a minimum.

Pinafore was a 39 foot Motor Launch that served as a Naval Auxiliary Patrol Vessel. The boat was requisitioned for naval service on 23 September 1942 and commissioned into the RAN the same day. The boat was purchased by the Australian Government on 25 August 1943. HMAS Pinafore was decommissioned 12 September 1945 later sold.

HMAS Pinafore first appeared in the January 1944 edition of the Navy List:
HMAS Pinafore first appeared in the January 1944 edition of the Navy List: