RFA Wave Ruler (A390)

	Wave Ruler underway with a United States Coast Guard Eurocopter HH-65 Dolphin helicopter embarked
History
United Kingdom
Name	RFA Wave Ruler
Operator	Royal Fleet Auxiliary
Ordered	12 March 1997
Builder	Kvaerner Govan; BAE Systems Marine;
Launched	9 February 2001
Commissioned	27 April 2003
Out of service	Planned by March 2025
Homeport	HMNB Devonport
Identification	IMO number: 9168609; MMSI number: 235519000; Callsign: GCVR; Pennant number A390;
Status	Extended readiness (uncrewed reserve)
Badge
General characteristics
Class & type	Wave-class tanker
Displacement	31,500 tonnes approx
Length	196.5 m (644 ft 8 in)
Beam	28.25 m (92 ft 8 in)
Draught	9.97 m (32 ft 9 in)
Propulsion	Diesel-electric:; 4 × Wartsila 12V 32E/GECLM diesel generators 25,514 metric horsepower (18.76 MW); 2 × GEC Alstom motors with Cegelec variable speed converters 19,040 metric horsepower (14 MW); 1 × shaft; 18t thrust electric Kamewa bow thruster and 12t thrust electric stern thruster, both powered by Cegelec variable speed drives and motors;
Speed	18 knots (33 km/h; 21 mph)
Range	10,000 nmi (19,000 km; 12,000 mi) at 15 knots (28 km/h; 17 mph)
Capacity	16,000 m3 of liquids (of which 3,000 m3 aviation fuel & 380 m3 fresh water) ; 125 tonnes of lubricating oil; 500 m3 of solids; 150 tonnes of fresh food in eight 20 ft refrigerated container units.;
Complement	80 Royal Fleet Auxiliary personnel with provision for 22 Royal Navy personnel for helicopter and weapons systems operations
Sensors &; processing systems	Surface search: E/F band; Navigation: KH 1077, I-band; IFF: Type 1017;
Electronic warfare; & decoys	Sea Gnat decoy launcher system
Armament	2 × DS30B 30 mm cannon;; 2 × 7.62 mm Mk.44 miniguns (retired 2023);; 5 × 7.62 mm L7 machine guns;; 2 × Vulcan Phalanx CIWS (all weapons removed given uncrewed reserve status);
Aircraft carried	1 × Merlin helicopter with full hangar facilities

RFA Wave Ruler is a Wave-class fast fleet tanker of the Royal Fleet Auxiliary (RFA) of the United Kingdom tasked with providing fuel, food, fresh water, ammunition and other supplies to Royal Navy vessels around the world.

Wave Ruler was built by Kvaerner Govan (after 1999, BAE Systems Marine) and launched in 2001. She was accepted into service in 2003 and is the second ship to bear this name in RFA service. Wave Ruler and her sister Wave Knight, were designed to replace Olna and Olwen, two 36,000-ton Ol-class fast fleet tankers which were built at Swan Hunter and Hawthorn Leslie in the 1960s.

Wave Ruler was the last tanker commissioned into the RFA until RFA Tidespring became operational in late 2017.

History
Wave Ruler underway with a United States Coast Guard Eurocopter HH-65 Dolphin helicopter embarked
United Kingdom
Name	RFA Wave Ruler
Operator	Royal Fleet Auxiliary
Ordered	12 March 1997
Builder	Kvaerner Govan BAE Systems Marine
Launched	9 February 2001
Commissioned	27 April 2003
Out of service	Planned by March 2025
Homeport	HMNB Devonport
Identification	IMO number: 9168609 MMSI number: 235519000 Callsign: GCVR Pennant number A390
Status	Extended readiness (uncrewed reserve)
Badge
General characteristics
Class & type	Wave-class tanker
Displacement	31,500 tonnes approx
Length	196.5 m (644 ft 8 in)
Beam	28.25 m (92 ft 8 in)
Draught	9.97 m (32 ft 9 in)
Propulsion	Diesel-electric: 4 × Wartsila 12V 32E/GECLM diesel generators 25,514 metric horsepower (18.76 MW) 2 × GEC Alstom motors with Cegelec variable speed converters 19,040 metric horsepower (14 MW) 1 × shaft 18t thrust electric Kamewa bow thruster and 12t thrust electric stern thruster, both powered by Cegelec variable speed drives and motors
Speed	18 knots (33 km/h; 21 mph)
Range	10,000 nmi (19,000 km; 12,000 mi) at 15 knots (28 km/h; 17 mph)
Capacity	16,000 m³ of liquids (of which 3,000 m³ aviation fuel & 380 m³ fresh water) 125 tonnes of lubricating oil 500 m³ of solids 150 tonnes of fresh food in eight 20 ft refrigerated container units.
Complement	80 Royal Fleet Auxiliary personnel with provision for 22 Royal Navy personnel for helicopter and weapons systems operations
Sensors & processing systems	Surface search: E/F band Navigation: KH 1077, I-band IFF: Type 1017
Electronic warfare & decoys	Sea Gnat decoy launcher system
Armament	2 × DS30B 30 mm cannon; 2 × 7.62 mm Mk.44 miniguns (retired 2023); 5 × 7.62 mm L7 machine guns; 2 × Vulcan Phalanx CIWS (all weapons removed given uncrewed reserve status)
Aircraft carried	1 × Merlin helicopter with full hangar facilities