Boats & Watercraft

A boat is a watercraft designed to float or plane on water, and provide transport over it. Usually this water will be inland (lakes) or in protected coastal areas. However, boats such as the whaleboat were historically designed to be operated from a ship in an offshore environment. more...

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In naval terms, a boat is something small enough to be carried aboard another vessel (a ship). Some boats too large for the naval definition include the Great Lakes freighter, riverboat, narrowboat and ferryboat. Modern submarines can also be called boats, despite their underwater capabilities and size. This may be because the first submarines could be carried by a ship and were not capable of making independent offshore passages. Boats may be used by the military or other government interests, or for research or commercial purposes; but regardless of size, a vessel in private, non-commercial usage is almost certainly a boat.

See also: Glossary of nautical terms and Naval architecture

The roughly horizontal, but cambered structures spanning the hull of the boat are referred to as the "deck". In a ship there are often several, but a boat is unlikely to have more than one. The similar but usually lighter structure which spans a raised cabin is a coach-roof. The "floor" of a cabin is properly known as the sole but is more likely to be called the floor. (A floor is properly, a structural member which ties a frame to the keelson and keel.) The underside of a deck is the deck head. The keel is a lengthwise structural member to which the frames are fixed (sometimes referred to as a backbone). The vertical surfaces dividing the internal space are bulkheads. The front of a boat is called the bow or prow. The rear of the boat is called the stern. The right side is starboard and the left side is port. Boats of earlier eras often featured a figurehead protruding from the front of the bows.

Types of boats

Unusual boats have been used for sports purposes - for example, in "big bathtub races" which use boats made from bathtubs. Pumpkins have been used as boats as in the annual Pumpkin Boat Race on Lake Otsego in New York state, USA. In this race, very large, hollowed out pumpkin shells are used for boats, powered by canoe paddles.

Boat building materials

See also: Boat building

Until the mid 19th century most boats were of all natural materials; primarily wood. Many boats had been built with iron or steel frames but still planked in wood. In 1855 ferro-cement boat construction was patented by yothe French. They called it Ferciment. This is a system by which a steel or iron wire framework is built in the shape of a boat's hull and covered (troweled) over with cement. Reinforced with bulkheads and other internal structure it is strong but heavy, easily repaired, and, if sealed properly, will not leak or corrode. These materials and methods were copied all over the world, and have faded in and out of popularity to the present. As the forests of Britain and Europe continued to be over-harvested to supply the keels of larger wooden boats, and the Bessemer Process (patented in 1855) cheapened the cost of steel, steel ships and boats began to be more common. By the 1930s boats built of all steel from frames to plating were seen replacing wooden boats in many industrial uses, even the fishing fleets. Private recreational boats in steel are uncommon. In the mid 20th century aluminum gained popularity. Though much more expensive than steel, there are now aluminum alloys available that will not corrode in salt water, and an aluminum boat built to similar load carrying standards could be built lighter than steel. Nonetheless, boats are generally built in such a manner as to keep water from invading the hull, which would cause the boats to sink.

Read more at Wikipedia.org