A term which describes the rising of warm air above cold air when two air masses of different temperatures, humidity and pressure meet.

A figure marked on the side of merchant vessels to indicate allowed loading depths. Named after Samuel Plimsoll, English Member of Parliament and maritime reformer.

Development of the lugsail rig where the sail is cut with a very short luff and lon leech.

A device used to keep a line from slipping, such as a jamcleat.

Small sea that rises just above bows or gunwale.

In the middle portion of the boat - Roughly halfway between a ship's stem and stern, and where the beam usually is the widest.

A display of national colors at all mastheads and the array of signal flags from bow to stern over the masthead (for special occasions and holidays).

Abbreviation for "Inland Point Intermodal." Refers to inland points (non-ports) that can be served by carriers on a through bill of lading.

A multihull with two hulls separated by a deck or crossbeams from which a trampoline is suspended; abbreviated "cat."

Usual and accustomed speed.

Speed or velocity of current (2) The leeway, or movement of the boat, when not under power, or when being pushed sideways while under power

Force per unit area, usually expressed in pounds per square inch (PSI) or BAR.

Ocean vessels constructed with heavy-duty submersible hydraulic lift or elevator system at the stern of the vessel. The Sea-Bee system facilitates forward transfer and positioning of barges. Sea-Bee barges are larger than LASH barges. The Sea-Bee system i ...

A frame that supports a boat when she's hauled out of the water onto shore.

Analog

A small storm jib made of very heavy cloth.

During the operation of tacking, the moment when a sailing vessel is head to the wind and hanging there, with her head not paying off on the opposite tack. Such a vessel is said to be "in stays" or "in irons".

A laborer who works at loading and discharging cargo.

To drag the bottom for an anchor. Also, large oars used in small vessels to force them ahead.

An old expression meaning heartily or quickly.