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A johnboat in Florida, 1972 A small modern johnboat in the bed of a pickup truck. A johnboat [1] is a flat-bottomed boat [2] constructed of aluminum, fiberglass, wood, or polyethelene with one, two, or three seats, usually bench type.
A deep-penetrating anchor (DPA) is conceptually similar to a torpedo anchor: it features a dart-shaped, thick-walled, steel cylinder with flukes attached to the upper section of the anchor. A full-scale DPA is approximately 15 metres (49 ft) in length, 1.2 metres (4 ft) in diameter, and weighs on the order of 50–100 tonnes (49–98 long tons ...
The jolly boat, smaller than a cutter, was a clinker-built ship's boat used as a hack boat for small work and as a lifeboat. It was 18 ft (5 m) long and 6.5 ft (2 m) across its beam. The boat contained the following items: a canvas sail; compass; sea anchor; axe; boat cover; flares; matches; medical kit; six pairs of oars; one 20 lb tin of ...
through hand-operated oars, paddles, or poles, or; through the feet with pedals, crankset or treadle. [1] While most human-powered watercraft use buoyancy to maintain their position relative to the surface of the water, a few, such as human-powered hydrofoils and human-powered submarines, use hydrofoils, either alone or in addition to buoyancy.
Traditional wooden oars. An oar is an implement used for water-borne propulsion. Oars have a flat blade at one end. Rowers grasp the oar at the other end. The difference between oars and paddles is that oars are used exclusively for rowing. In rowing the oar is connected to the vessel by means of a pivot point for the oar, either an oarlock, or ...
A conical sea anchor with tripline (from an illustration in The Sailors Handbook by Halsey C. Herreshoff). An early wooden drogue. A sea anchor (also known as a parachute anchor, drift anchor, drift sock, para-anchor or boat brake) is a device that is streamed from a boat in heavy weather. Its purpose is to stabilize the vessel and to limit ...
Boats used in the sport of rowing may be adjusted in many different ways according to the needs of the crew, the type of racing, and anticipated rowing conditions. The primary objective of rigging a boat is to accommodate the different physiques and styles of rowing of the crew in such a way that the oars move in similar arcs through the water, thus improving the crew's efficiency and ...
A rowlock on a rowing boat A rowlock used for rowing. A rowlock [1] (UK: / ˈ r ɒ l ə k /), sometimes spur (due to the similarity in shape and size), oarlock (American English) [2] or gate, is a brace that attaches an oar to a boat. When a boat is rowed, the rowlock acts as a fulcrum for the oar. [3]
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