(1) Sighting two objects in a line to indicate a course to be steered (2) The distance a boat can travel using the fuel stored aboard.

(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.

To temporarily stop all movement of a line through a block by placing the hauling part across the sheave of the block. This jams the sheave and holds it tight, and a pull on the hauling part will release it.

The act of supporting anything by propping or shoring it up.

Same as two blocks.

ISO.

The pressure that would be produced by stopping a moving stream of liquid or gas.

In sailboat racing, to take to opposite tack of the rest of the fleet when behind, hoping that the wind will shift to your benefit.

The operation of reducing a sail by taking in one or more of the reefs.

Small line consisting of several loosely twisted yarns.

A short length of small rope "ratline stuff" running horizontally across shrouds, for a ladder step.

Small struts or spars extending toward the sides from one or more places along the mast. The shrouds cross the end of the spreaders, enabling the shrouds to better support the mast. Also known as crosstrees in older vessels.

The stationary seating surface, the inlet of a valve.

The line of longitude 180 degrees opposite Greenwich, England, located in the Pacific that marks the date change

Mythical sea nymphs who charmed men with their melodious voices. Enchanted, the men would stop all work to listen and they would ultimately die of starvation because of their inability to sail any further.

This term is used for turbo compressors and represents the maximum flow condition. It is sometimes also referred to as stonewalling.

Abbreviation for:- Port of Loading.- Petroleum, Oil, and Lubricants.

Place where cargo is loaded and leaves a country.

(1) A small coastal inlet generally protected from the worst of the prevailing winds. (2) A thin, hollowed line cut along a yacht's sheer below deck level and traditionally gilded.

On a wooden vessel, the outermost deck plank covering the gunwale. also called Covering Board