Condition that exists when the air, gas, or fluid normally passing through an element is being shunted around the element.

The act of breaking out the flukes of an anchor if they are caught on some obstruction, preventing it from being normally weighed.

(1) An engine. (2) The act of using an engine to move a boat.

An elevated guardrail set up at the bow of a vessel. When erected at the stern, it is called a pushpit.

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

A filtering unit for vented enclosures installed to prevent dirt and foreign matter from entering the enclosure.

Is a pipe extending downward from the bottom of the airline to collect any condensation flow in the pipe.

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

Said of a vessel when water level has fallen from the level at which she would float, so she would be aground and need to wait for the next tide before re-floating. Also said of the water that has receded and caused a vessel to go aground.

The difference between the maximum extended height and the compressed height of an air actuator.

The lower yard on a mizzen mast of a square-rigged ship.

When the two blocks of a tackle have been drawn as close together as possible.

Kept in a neat seaman-like manner.

Lines drawn on a weather map indicating regions of equal pressure. When the lines are close together, this indicates a rapid change in air pressure, accompanied by strong winds.

Are used with ejectors to convert weight of gas and/or water vapor handled to or from equivalent air.

A deck crew member who is subordinate to the Able Bodied Seamen.

The space between the two sides of the shell of a block in which the sheave is fitted.

A fishing vessel designed to tow a trawl for catching bottom fish.

Light, warm wind on surface of sea.

Cycles per minute - a unit of measure of the frequency of any vibration.