More recently, some have electric outboards, such as Torqeedo outboards. There are also trolling motors available for shallow water navigation, primarily used in fishing powerboats. Smaller vessels may use jet propulsion (especially wake boats), powered by a water pump. There are both inboard and outboard options, and some models include dual, triple, or quad engines (even quintuple or sextuple on some high-performance models). Powerboats can be operated with a variety of types of engines and motors. Some powerboats designed for shallow water or certain types of fishing, such as skiffs and flats boats, may be made from lightweight molded aluminum. There are also models available that are custom-designed and built, as well as specialty, collectible power boats constructed from premium marine wood. Powerboats are often mass-produced, so efficiency in production is a must. Modern powerboats are typically made of fiberglass resin or composite finish, which is usually a molded design (although they are increasingly being made of carbon-fiber composite materials). Other types of powerboats include deck boats, flats boats, pontoons, skiffs, sportfishing boats, houseboats, and bowriders. There are even some sailboats that can be considered powerboats because of their use of motorized engines in certain conditions or situations. Sometimes referred to as motor boats, motor yachts, or superyachts (ranging from 24 meters/79 feet), powerboats include any number of yachts, cruisers, console boats, fishing boats, and other boat styles, and have been around since the creation of the marine engine. A powerboat is any subclass of boat that is operated by a motorized engine, either inboard or outboard.
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