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A rowlock[1] (UK: / ˈrɒlək /), 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] On ordinary rowing craft, the rowlocks are attached to the gunwales. In the sport of rowing, the ...
A gate is opened to allow a boat to enter or leave the chamber; when closed, the gate is watertight. A set of lock gear to empty or fill the chamber as required. This is usually a simple valve (traditionally, a flat panel (paddle) lifted by manually winding a rack and pinion mechanism) which allows water to drain into or out of the chamber. [ 11 ]
Boats. A small boat stuffing box comprising an adjusting nut, a locking nut and a sleeve. On a boat having an inboard motor that turns a shaft attached to an external propeller, the shaft passes through a stuffing box, also called a "packing box" or "stern gland" in this application. The stuffing box prevents water from entering the boat's hull.
The Vagabond 17 is a recreational keelboat, built predominantly of fiberglass, with teak wood trim. It has a fractional sloop rig with aluminum spars. The hull has a raked stem, a vertical transom, a transom-hung rudder controlled by a tiller and a locking swing keel. It displaces 950 lb (431 kg) and carries 345 lb (156 kg) of ballast. [1][3]
May 22, 1849. Location. Illinois. Abraham Lincoln's patent relates to an invention to buoy and lift boats over shoals and obstructions in a river. Abraham Lincoln conceived the invention when on two occasions the boat on which he traveled got hung up on obstructions. Lincoln's device was composed of large bellows attached to the sides of a boat ...
Moon pool. A moon pool is an equipment deployment and retrieval feature used by marine drilling platforms, drillships, diving support vessels, fishing vessels, marine research and underwater exploration or research vessels, and underwater habitats. [1] It is also known as a wet porch. [2] It is an opening found in the floor or base of the hull ...
Crank (mechanism) Hand crank for a winch on a sailboat - commonly referred to as a winch handle. A crank is an arm attached at a right angle to a rotating shaft by which circular motion is imparted to or received from the shaft. When combined with a connecting rod, it can be used to convert circular motion into reciprocating motion, or vice versa.
Angling with a rod. A young angler who has successfully hooked a black crappie in the mouth. Angling (from Old English angol, meaning "hook") is a fishing technique that uses a fish hook attached to a fishing line to tether individual fish in the mouth. The fishing line is usually manipulated via a fishing rod, although rodless techniques such ...