A measure of weight ashore and a measure of capacity on a vessel.

The alternating motion of a boat, leaning alternately to port and starboard; the motion of a boat about its fore-and-aft axis.

The horsepower required to compress adiabatically the air or gas delivered by the compressor through the specified range of pressures.

To lash up.

Speed Over Ground, speed relative to bottom.

A knot used to temporarily shorten a line.

Sailing with the motor on and in gear

Pieces of hard wood bolted to the outer end of a bowsprit through which are rove the foretopmast stays before they are brought in to the bows and secured.

Across the width of a boat. Also Athwartships.

(1) A second method of propelling a vessel. On a sailboat this would be the engine. (2) Machinery fitted in steam and motor vessels which is not part of the main propelling machinery. (3) a support group, e.g., Coast Guard Auxiliary

Ratio of the pressure of a gas to its critical pressure, in like units.

An illegal form of discounting or refunding that has the net effect of lowering the tariff price. See also Malpractice.

A line on the compass aligned with the centerline of the vessel that indicates the vessel's compass heading. Since it points to the vessel's bow, it enables a course to be steered by bringing the lubber's line to the point on the compass card which indica ...

A command to stop or cease immediately what one is doing.

Cargo ship of 14.800 tonnes deadweight.

Navy term meaning to change the arrangement of the colors (the national flag) upon getting under way or coming to moorings.

is the design (built-in) compression ratio for a rotary unit having this feature

A number system used to describe wind forces and sea conditions from 0 for a flat calm to 12 for a hurricane

A navigational aid that emits radio waves for navigational purposes. The radio beacon's position is known and the direction of the radio beacon can be determined by using a radio direction finder.

A point of sail where the boat is sailing at a right angle to the wind (wind coming from abeam). A beam reach is usually the fastest point of sail. A beam reach is a point of sail between a broad reach and a close reach.