Double Eagle (mine disposal vehicle)
A Double Eagle Mark II ROV carried aboard the minehunter HMAS Yarra
The Double Eagle is a remotely operated vehicle (ROV) built by the Swedish defence company Saab Underwater Systems AB and used for the disposal of naval mines.[1]
Contents
1 Design
1.1 Current models
2 Operators
2.1 Mark II
2.2 Mark III
3 Citations
4 References
Design
As of 2009, four versions of the ROV have been designed.[1][2]
The original version was named the Sea Eagle, and was a militarised variant of the civilian Sea Owl ROV.[1] This unit was 1.3 metres (4 ft 3 in) long, 0.76 metres (2 ft 6 in) wide, and 0.4 metres (1 ft 4 in) high, could travel at 3 knots (5.6 km/h; 3.5 mph), and dive to 500 metres (1,600 ft).[1] These ROVs saw service with the Swedish Navy from 1984 onwards.[1]
The second version, named the Double Eagle, is larger, measuring 1.9 metres (6 ft 3 in) in length, 1.3 metres (4 ft 3 in) in width, and 0.8 metres (2 ft 7 in) in height.[1] The ROV weighs 400 kilograms (880 lb), can dive to 500 metres (1,600 ft), and travel at 5 knots (9.3 km/h; 5.8 mph).[1]
Current models
The Double Eagle Mark II is larger but lighter than the first Double Eagle.[1] Measuring 2.1 metres (6 ft 11 in) long, 1.3 metres (4 ft 3 in) wide, and 0.5 metres (1 ft 8 in) high, the unit weighs 340 kilograms (750 lb), dives to 500 metres (1,600 ft), and can reach 6 knots (11 km/h; 6.9 mph).[1] The Mark II entered service in 1994.[2]
The Mark III is 80 centimetres (31 in) longer and 130 kilograms (290 lb) heavier than its predecessor.[2]
The ROV's payload can consist of scanning sonar, echo locations, doppler logs, or self-navigation systems.[2] All Double Eagles are equipped with an extendable manipulator arm, which is commonly used to place a small explosive charge on a mine.[1] The ROV can be modified to double as a self-propelled variable depth sonar: the Mark II Double Eagles fitted to the French Navy's Tripartite class minehunters have been altered to carry a Thales TSM 2022 sonar, while a similar upgrade is to occur to the Mark III units being acquired for the Tripartites of the Royal Netherlands Navy.[2]
The Double Eagle Mark II uses two 5 kilowatt brushless electric motors for main propulsion, and six 0.4 kilowatt brushless electric motors for fine manoeuvering.[3] Mark III ROVs have four 7 kilowatt brushless electric motors as main thrusters.[citation needed] Double Eagles can operate in any orientation.[1]
Operators
Mark II
Royal Australian Navy
Huon class minehunter[3]
Royal Danish Navy
Flyvefisken class patrol vessel (Standard Flex module)[4]
Finnish Navy
Katanpää class mine countermeasure vessel[2]
French Navy
Tripartite class minehunter[2]
Swedish Navy[2]
Mark III
Belgian Navy
Tripartite class minehunter[2]
Royal Netherlands Navy
Tripartite class minehunter[2]
Swedish Navy
Koster class minehunter[2]
Visby class corvette[2]
Citations
^ abcdefghijk Fletcher, Worldwide Undersea MCM Vehicle Technologies
^ abcdefghijkl Fish & Hollosi, Demining the deep
^ ab Clarke, Magnetic signature of brushless electric motors, p. 1
^ Scott, Flexing a snap-to-fit fleet
References
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Clarke, David (2006). Magnetic Signature of Brushless Electric Motors (PDF). Fishermans Bend, VIC: Defence Science and Technology Organisation. Retrieved 30 January 2010..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"""""""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
Fish, Tim; Hollosi, Charles (1 June 2009). "Demining the deep: unmanned underwater vehicles". Jane's Defence Weekly. Jane's Information Group.
Fletcher, Barbara (March 2000). Worldwide Undersea MCM Vehicle Technologies (PDF). San Diego, CA: Space and Naval Warfare Systems Center. Retrieved 30 January 2010.
Scott, Richard (31 October 2001). "Flexing a snap-to-fit fleet". Jane's Defence Weekly. Jane's Information Group.
