A dock line leading forward or aft, to prevent a vessel from moving ahead or astern. The after bow spring line is attached near the bow and runs aft, where it is attached to the dock. The forward quarter spring line is attached to the quarter of the boat, ...

The highest and lowest course of tides, occuring every new and full moon.

The tides found during a New Moon or Full Moon. They run the strongest and are the highest and lowest tides experienced in the tidal cycle.

In a wooden vessel, a plank in the hull springs when one of its ends breaks loose, and because of its shape bent to the curve of the hull, springs outwards beyond that curve. Such a plank is said to be sprung.

(1) A spar that extends from the bow of the boat. (2) A spar stretching diagonally across a four-sided fore-and-aft sail to support the peak.

A four-sided fore-and-aft sail set on a sprit.

Froth of sea foam.

Small line consisting of several loosely twisted yarns.

A sudden and violent gust of wind.

On a square-rigged ship, the yards are square by the braces when they are at right angles to the fore-and-aft lines of the ship.

Large ships dating back to the 17th century typically with three masts carrying rectangular sails mounted on horizontal spars called yards. A sailing-ship rig with rectangular sails set approximately at right angles to the keel line from horizontal yards.

Ship's intercom system

A deck dryer composed of a flat piece of wood shod with rubber, and a handle. Stanchions

Screw compressor development center. Licensor to 90% of twin screw compressor market.

Short ton

An electrical discharge caused by certain atmospheric conditions, which takes place around the rigging. Known by many other names, it was regarded by many superstitious seamen as a favorable omen, foretelling the end of stormy weather. And others believed ...

The tendency in a boat to keep an upright position or to return to it when careened over.

The force that holds a vessel upright or returns it to upright if keeled over. Weight in the lower hold increases stability. A vessel is stiff if it has high stability, tender if it has low stability.

Stability is 100 minus the surge limit at rated discharge pressure, where the surge limit is expressed in percentage of rated capacity.

Wing-like retractable devices extending from the sides of the vessel to dampen down rolling in seas and produce a steadier, smoother, and more comfortable motion.