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2. Marine propulsion - Wikipedia

   en.wikipedia.org/wiki/Marine_propulsion

   Marine propellers are also known as "screws". There are many variations of marine screw systems, including twin, contra-rotating, controllable-pitch, and nozzle-style screws. While smaller vessels tend to have a single screw, even very large ships such as tankers, container ships and bulk carriers may have single screws for reasons of fuel ...

3. Electric boat - Wikipedia

   en.wikipedia.org/wiki/Electric_boat

   An electric boat is a powered watercraft driven by electric motors, which are powered by either on-board battery packs, solar panels or generators. [ 1 ] While a significant majority of water vessels are powered by diesel engines , with sail power and gasoline engines also popular, boats powered by electricity have been used for over 120 years.

4. Outboard motor - Wikipedia

   en.wikipedia.org/wiki/Outboard_motor

   The pivoting design allows the outboard motor to be swiveled by the operator in almost all directions: Sideways for direction, up and down to change the thrust line according to speed or bow lift, elevate completely out of water for easy starting, placing the drive shaft and the propeller forward along the side of the boat for reverse, or put ...

5. Marine thruster - Wikipedia

   en.wikipedia.org/wiki/Marine_thruster

   A marine thruster is a device for producing directed hydrodynamic thrust mounted on a marine ... Depending on the size of the motors driving these propellers, they ...

6. 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.

7. Propeller - Wikipedia

   en.wikipedia.org/wiki/Propeller

   Supercavitating propeller – Marine propeller designed to operate with a full cavitation bubble; Variable-pitch propeller – Propeller with blades that can be rotated to control their pitch while in use; Voith-Schneider propeller – Perpendicular axis marine propulsion system; Wake-equalising duct – Ship hull appendage to modify propeller ...