Starting in the late 1960s, planning began for a new class of patrol boat to replace the Attack class, with designs calling for improved seakeeping capability, and updated weapons and equipment.

[2] Each patrol boat was armed with a single Bofors 40mm gun as main armament, supplemented by two .50 cal Browning machineguns and an 81 mm mortar,[2] although the mortar was removed from all ships sometime after 1988.

[citation needed] The main weapon was originally to be two 30 mm guns on a twin-mount, but the reconditioned Bofors were selected to keep costs down; provision was made to install an updated weapon later in the class' service life, but this did not eventuate.

[6] The patrol boat was broken up for scrap in Darwin during 2006, at a cost of $450,000 to the Australian government.

This article about a specific Australian naval ship or boat is a stub.