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2. Trolling motor - Wikipedia

   en.wikipedia.org/wiki/Trolling_motor

   A trolling motor is a self-contained marine propulsion unit that includes an electric motor, propeller and control system, and is affixed to an angler's boat, either at the bow or stern. A gasoline-powered outboard used in trolling , if it is not the vessel's primary source of propulsion, may also be referred to as a trolling motor.

3. Trolling (fishing) - Wikipedia

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

   In marine environments, trolling is used in big-game fishing to catch large offshore or open-water species such as tuna and marlin. Saltwater anglers also troll for inshore species such as bluefish, kingfish and various jacks. [19] Rock fishermen can use an umbrella rig as a method of trolling without using a boat. Typically, an umbrella rig ...

4. Magnetohydrodynamic drive - Wikipedia

   en.wikipedia.org/wiki/Magnetohydrodynamic_drive

   Yamato 1 on display in Kobe, Japan.The first working full-scale MHD ship. A magnetohydrodynamic drive or MHD accelerator is a method for propelling vehicles using only electric and magnetic fields with no moving parts, accelerating an electrically conductive propellant (liquid or gas) with magnetohydrodynamics.

5. Marine propulsion - Wikipedia

   en.wikipedia.org/wiki/Marine_propulsion

   While paddles and sails are still used on some smaller boats, most modern ships are propelled by mechanical systems consisting of an electric motor or internal combustion engine driving a propeller, or less frequently, in pump-jets, an impeller. Marine engineering is the discipline concerned with the engineering design process of marine ...

6. Oceanvolt - Wikipedia

   en.wikipedia.org/wiki/Oceanvolt

   Oceanvolt has received several awards for its SD8.6 saildrive system, the latest being the 2013 Pittman Innovation Award given by SAIL Magazine for Oceanvolt's "compact robust design" [1] featuring waterproof permanent magnet motor with closed circulation liquid cooling, single lever control with motor status shown by LEDs, and folding ...

7. Liquid rheostat - Wikipedia

   en.wikipedia.org/wiki/Liquid_rheostat

   Liquid rheostats used as motor start switches, circa 1900. A liquid rheostat or water rheostat [1] or salt water rheostat is a type of variable resistor.This may be used as a dummy load or as a starting resistor for large slip ring motors.