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2. Outboard motor - Wikipedia

   en.wikipedia.org/wiki/Outboard_motor

   Basic parts of an outboard motor. An outboard motor is a propulsion system for boats, consisting of a self-contained unit that includes engine, gearbox and propeller or jet drive, designed to be affixed to the outside of the transom. They are the most common motorised method of propelling small watercraft.

3. Trolling (fishing) - Wikipedia

   en.wikipedia.org/wiki/Trolling_(fishing)

   Trolling motors calibrate speed more accurately than large outboard motors. Trolling plates are also used with larger motors to slow the boat to the desired speed, although some anglers experience mixed results with plates. [citation needed] Trolling can be effective at surprisingly low speeds.

4. Jack (device) - Wikipedia

   en.wikipedia.org/wiki/Jack_(device)

   A jack which can lift a mobile home. A jack is a mechanical lifting device used to apply great forces or lift heavy loads. A mechanical jack employs a screw thread for lifting heavy equipment. A hydraulic jack uses hydraulic power. [1] The most common form is a car jack, floor jack or garage jack, which lifts vehicles so that maintenance can be ...

5. Stewart platform - Wikipedia

   en.wikipedia.org/wiki/Stewart_platform

   A Stewart platform is a type of parallel manipulator that has six prismatic actuators, commonly hydraulic jacks or electric linear actuators, attached in pairs to three positions on the platform's baseplate, crossing over to three mounting points on a top plate.

6. Marine propulsion - Wikipedia

   en.wikipedia.org/wiki/Marine_propulsion

   The rotating crankshaft can be directly coupled to the propeller with slow speed engines, via a reduction gearbox for medium and high speed engines, or via an alternator and electric motor in diesel-electric vessels. The rotation of the crankshaft is connected to the camshaft or a hydraulic pump on an intelligent diesel.

7. Hydraulic motor - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_motor

   The hydraulic motor is the rotary counterpart of the hydraulic cylinder as a linear actuator. Most broadly, the category of devices called hydraulic motors has sometimes included those that run on hydropower (namely, water engines and water motors) but in today's terminology the name usually refers more specifically to motors that use hydraulic ...

8. Jackup rig - Wikipedia

   en.wikipedia.org/wiki/Jackup_rig

   Modern jacking systems use a rack and pinion gear arrangement [7] where the pinion gears are driven by hydraulic or electric motors and the rack is affixed to the legs. [citation needed] Jackup rigs can only be placed in relatively shallow waters, generally less than 120 metres (390 ft) of water.

9. Fishing vessel - Wikipedia

   en.wikipedia.org/wiki/Fishing_vessel

   A fishing vessel is a boat or ship used to catch fish and other valuable nektonic aquatic animals (e.g. shrimps/prawns, krills, coleoids, etc.) in the sea, lake or river. Humans have used different kinds of surface vessels in commercial, artisanal and recreational fishing.