Raised Deck Cruiser
16 January 1943
3 June 1946
Dimensions & Displacement
Length 38 feet
Beam 11 feet
Draught 4 feet 3 inches
Speed 7 knots
Guns 2 x .303 inch Vickers
Other Armament 4 x Mk VII 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.

Radical was a 38 foot Raised Deck Cruiser that served as an Air/Sea Rescue and Naval Auxiliary Patrol Vessel. The boat was requisitioned for naval service on 3 December 1942, before being commissioned into the RAN on 16 January 1943, under the command of Naval Auxiliary Patrol Acting Skipper Walter T Connelly. The boat was purchased by the Australian Government on 20 May 1943. HMAS Radical was decommissioned on 3 June 1946 and later sold.

HMAS Radical first appeared in the April 1943 edition of the Navy List:
HMAS Radical first appeared in the April 1943 edition of the Navy List: