U.S. classification society which certifies seagoing vessels for compliance to standardized rules regarding construction and maintenance.

Sails, such as the spinnaker, reacher and reaching staysail used when running or reaching

A journey made at sea by a vessel, usually including both the outbound and homebound passages.

Strong offshore current extending to the shore.

Navy term meaning Officer of the deck.

The direct sailing line in which a racing mark or buoy can be fetched while sailing the desired course

A component on a compressed air line that provides wide are coverage with a thin sheet of air. Also amplifies compressed air flow, reduces noise. Used in blowing, cooling. Also known as air knife.

A pear-shaped, grooved metal fitting around which an eye splice is made

A spring line from the stern of a boat to mid ships to stop forward movement

To tie something with a line; to secure

Condensation which occurs when a ship sails from a cool to a relatively warm climate.

A threaded, adjustable fitting, used for stays, lifelines and sometimes other rigging. It is used to to maintain correct tension on standing rigging. Can also be used to pull objects together.

A short strut on a mast angled forward at about 45

The compass points of North, East, South and West. Intercardinal or half-cardinal points are Southeast, Southwest, Northwest and Northeast

Is the pressure existing at a given temperature in a closed vessel containing a liquid and the vapor from that liquid after equilibrium conditions have been reached. It is dependent only on temperature and must be determined experimentally.

Insufficient number of crew; shorthanded.

Japanese tapered pipe thread (Male).

A line used to hoist or lower a sail, flag or spar. The tightness of the halyard can affect sail shape.

A gun used in the life-saving services to throw a life line to a ship in distress or from ship to shore and used when a boat cannot be launched.

Metal or wooden peg inserted in gunwale of a boat for an oar to heave against when rowing without crutch or rowlock.