A two-masted vessel with both masts square rigged. On the sternmost mast, the main mast, there is also a gaff sail

Metal fitting attached to the hull that supports and aligns the aft portion of the propeller shaft.

1,728 cubic inches. A volume contained in a space measuring one foot high, one foot wide and one foot long.

A boat selling supplies, provisions, and articles to ships.

A heavy longitudinal timber that angles upward from the stern to support the underside of the fantail.

To attach a boat to a mooring, dock, post, anchor, etc.

A hitch used to join two ropes. It can be used between lines of different diameters.

A draft to which no documents are attached.

Said of a vessel when she is entirely surrounded by ice.

The point where the stem joins the forward end of the keel.

Seaman who was born aboard a warship. As this was once considered to be one of the essentials of the perfect seaman, it has long been a complimentary term.

Back pressure.

Maximum pressure a vessel, or air filter housing will withstand without bursting.

A warehouse authorized by Customs to receive duty-free merchandise.

Costs that do not vary with the level of activity. Some fixed costs continue even if no cargo is carried. Terminal leases, rent and property taxes are fixed costs.

GMT for short. Greenwich Meridian Time, also known as Universal Time or Zulu time. A time standard that is not affected by time zones or seasons. It is the time used by navigators in celestial navigation.

The position of an object that lies off to one side of the vessel.

A line leading forward from the end of a mainsail boom to prevent the boom from swinging inboard while broad reaching or running. also Preventer

Metal or plastic pieces attached to a sail's luff that slide in a mast track to allow easy hoisting of the sail.

A language of "dots" and "dashes" used to send messages, either sound using radio waves, or light using a searchlight or Aldis lamp.