HMAS Benalla on Sydney Harbour in October 2013
Class overview
Name	Paluma
Builders	Eglo Engineering, Adelaide
Operators	Royal Australian Navy
In service	March 1988 – March 1990
In commission	February 1989 – June 2023
Completed	4
Retired	4
General characteristics
Type	Motor launch
Displacement	320 tonnes
Length	36.6 m (120 ft) length overall
Beam	13.7 m (45 ft)
Draught	1.9 m (6 ft 3 in)
Propulsion	2 Detroit V12 diesel engines
Speed	12 knots (22 km/h; 14 mph)
Range	1,800 nautical miles (3,300 km; 2,100 mi) at 10 knots (19 km/h; 12 mph)
Endurance	14 days
Complement	3 officers, 11 sailors (plus accommodation for 4 additional)
Sensors and processing systems	Radar: JRC JMA-3710-6 navigational radar Sonars: ELAC LAZ 72 side-scan mapping sonar Skipper 113 hull-mounted scanning sonar
Armament	None fitted

The Paluma-class motor launch was a class of four hydrographic survey motor launches operated by the Royal Australian Navy (RAN). Built in Port Adelaide between 1988 and 1990, the four catamarans were primarily based at HMAS Cairns in Cairns, Queensland, and operated in pairs to survey the waters of northern Australia.

The Paluma-class vessels are based on the design of the Prince-class roll-on/roll-off ferry.^[1] They have a full load displacement of 320 tonnes, are 36.6 metres (120 ft) long overall and 36 metres (118 ft) long between perpendiculars, have a beam of 13.7 metres (45 ft), and a draught of 1.9 metres (6 ft 3 in).^[2] Propulsion machinery consists of two General Motors Detroit Diesel 12V-92T engines, which supply 1,290 brake horsepower (960 kW) to the two propeller shafts.^[2] Each vessel has a top speed of 12 knots (22 km/h; 14 mph), a maximum sustainable speed of 10 knots (19 km/h; 12 mph) for a range of 1,800 nautical miles (3,300 km; 2,100 mi), and an endurance of 14 days.^[2]

The sensor suite of a Paluma-class launch consists of a JRC JMA-3710-6 navigational radar, an ELAC LAZ 72 side-scan mapping sonar, and a Skipper 113 hull-mounted scanning sonar.^[2] The vessels are unarmed.^[2] The standard ship's company consists of three officers and eleven sailors, although another four personnel can be accommodated.^[2] The catamarans were originally painted white, but were repainted naval grey in 2002.^[2]

The four ships were built by Eglo Engineering, at their shipyard in Port Adelaide, South Australia.^[2] The first, HMAS Paluma, was laid down in March 1988, and commissioned into the RAN in February 1989.^[2] All four ships were under construction by November 1988, and the last, HMAS Benalla, commissioned in March 1990.^[2]

All four vessels were homeported at HMAS Cairns in Cairns, Queensland.^[2] They were used for hydrographic surveys of the shallow waters around northern Australia, primarily in the Great Barrier Reef.^[2] The vessels generally operated in pairs.^[2]

Defending Australia in the Asia Pacific Century: Force 2030, the 2009 Department of Defence white paper, proposed replacing the Palumas, along with the RAN's patrol and mine warfare vessels, with a single class of multi-role offshore combatant vessels (OCVs).^[4][5] The new vessels, which could displace up to 2,000 tonnes and be equipped for helicopter or unmanned aerial vehicle operations, will use a modular mission payload system to change between roles as required.^[4][5][6][7]

Although the 2013 White Paper committed to the OCV as a long-term plan, it announced that life-extending upgrades to the Palumas would be sought as a short-term solution.^[8]

• Saunders, Stephen, ed. (2008). Jane's Fighting Ships 2008–2009. Jane's Fighting Ships (111th ed.). Surrey: Jane's Information Group. ISBN 9780710628459. OCLC 225431774.
• Wertheim, Eric, ed. (2007). The Naval Institute Guide to Combat Fleets of the World: Their Ships, Aircraft, and Systems (15th ed.). Annapolis, MD: Naval Institute Press. ISBN 9781591149552. OCLC 140283156.

• Official RAN webpage