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A spar that supports the head of a four-sided fore-and-aft sail. The gaff is attached near its forward end to the mast and extends aft and usually upward. Its jaws or other mast fitting guide it, while a throat halyard raises the forward end and a peak halyard controls the outer end and sail shape….
A waterborne craft or other structure used, or capable of being used, as a means of transport on water. In the International Regulations for Preventing Collisions at Sea, the term includes every description of water craft, non-displacement craft, wing-in-ground craft and seaplanes used or capable of being used for transportation on water. The exact legal…
An expression meaning to be in serious disagreement or conflict. A loggerhead was historically a long-handled iron tool with a bulbous end that could be heated, including for warming pitch aboard ships. The idea of people using such tools against one another is a proposed explanation for the idiom, but the specific story is not…
The system of lines, wires, spars and fittings that supports and controls a vessel’s masts and sails. Standing rigging supports the mast and normally includes shrouds and stays. Running rigging moves or controls sails and spars and includes halyards, sheets, guys, lifts and associated blocks and winches. As a verb, rigging means fitting, arranging or…
The exposed or upper part of a vessel situated on or above its weather deck. The phrase distinguishes deck-level and superstructure spaces or equipment from accommodation, machinery and storage below deck. What counts as above deck depends on the vessel’s layout and the particular deck being referenced. People working above deck are exposed to weather,…
Weather with little cloud and no precipitation or obscuration significantly affecting the observer. In everyday marine use, clear conditions normally indicate an open sky and good visibility. The word should not be treated as a complete forecast: strong wind, a difficult sea state, heat, cold or other hazards can exist beneath a clear sky. Visibility…
A report confirming that a line or other potential obstruction is free and no longer holding the vessel. During departure, a crew member may report that a mooring line is “clear” once it has been released, recovered aboard and is no longer able to foul the propeller, rudder or another fitting. The report gives the…
The uppermost corner or edge of a sail. On a triangular mainsail or headsail, the head is the reinforced corner from which the sail is hoisted by its halyard. It may carry a headboard, cringle, shackle or another fitting suited to the sail and rig. On four-sided sails, the upper edge may be a head…
A buoyant structure used to support a floating landing stage, bridge, platform or vessel hull. In a marina, “pontoon” commonly means the floating walkway alongside which boats berth, including its finger berths and access bridge. The same word also describes individual flotation units beneath catamarans, work platforms and temporary bridges. Pontoon height and movement change…
A sheltered berthing facility for recreational and small commercial craft, normally organised around pontoons, quays or mooring berths. Facilities vary but may include shore power, water, fuel, waste disposal, toilets, showers, repairs, storage and launching. A marina may lie within a harbour or occupy a separate basin protected by breakwaters or locks. Entry, speed, radio,…
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