Indirect heat exchanger designed to transfer heat from combustion gas to the air stream added to the combustion zone.

The small triangular space found at the intersection of lines of position on a chart when a ship's position is determined by taking three bearings.

Wind that is deflected from it's normal course by the sails

The framework of timber, etc., on which a vessel is built, from which she is launched into the water.

The average level of the oceans, used when finding water depths or land elevations.

After mast on a schooner or sailing ship carrying a spanker; usually the fourth mast of a five or six masted schooner.

The ability of a boat to keep from being moved sideways by the wind. Keels, daggerboards, centerboards, and leeboards are all used to improve a boat's lateral resistance.

Freight that has not been called for or picked up by the consignee or owner.

Annual publication of astronomical data for the use of navigators.

Is one which 1) handles a small constant flow of liquid with the gas; 2) utilizes evaporative (injection) cooling; or 3) circulates a liquid for sealing and/or cooling. The last may or may not be evaporative cooling.

Light, bulky articles.

A sprocket wheel on the windlass for taking links of the chain cable.

A call requesting direction in answer to the report of a lookout that an object has been sighted.

The fitting in the bottom of the boat in which the bottom or heel if the mast sits.

Navigable channel.

(1) The distance that the wind and sea has to travel over open water unimpeded by land; the longer the fetch, generally the higher the waves. (2) Also to reach someplace, especially in adverse conditions. When sailing close-hauled, being able to arrive at ...

Equipment used for serving meals.

An order meaning sufficient (enough).

(1) A body of salt water. A very large body of fresh water. (2) The condition of the water around a boat. Heavy seas for example.

When the water has large or breaking waves in stormy conditions.