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Modern underwater thrusters usually use brush-less permanent magnet synchronous motors . [citation needed] In some low-quality thrusters brushless D.C. motors are used. The gain is lower price and the penalty is lower efficiency.
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]
Six brushless DC thrusters each providing 250 lbf thrust: Speed: 1.5 knot forward, 0.5 knot lateral, 1.0 knot vertical: Endurance: theoretically indefinite: Test depth: 6500 m: Sensors and processing systems: Attitude Two-axis clinometer, 0.1 degree resolution Heading Flux-gate compass, 0.1 degree resolution Gimballed gyro, 0.1 degree resolution
Theseus is a large autonomous underwater vehicle ... housed the aft variable ballast tank/pump and thruster. ... was driven by a 6 hp brushless DC motor and gearbox. ...
ROV Odysseus 6K is a remotely operated underwater vehicle designed and operated by Pelagic Research Services of South Wellfleet, Massachusetts. The ROV is named for Odysseus , protagonist of the Odyssey , and its maximum rated depth, 6,000 m (20,000 ft), measured as metre sea water .
UUV TALISMAN of BAE System UUV TALISMAN model (BAE System). The Talisman UUV is a fully autonomous unmanned mini-sub designed and made by BAE Systems.It has the capability to perform shoreline reconnaissance when the risks may be deemed too high, or conditions unsuitable, for human operators.