A wedge-shaped piece of timber used to secure barrels against movement.

A vessel designed for the transport of people or goods from one place to another on a regular schedule.

The distance the bow of a boat is forward of another's stern

Pockets in a sail where battens can be placed to stiffen the sail.

The highest operating pressure the system or component is designed to withstand.

Compressors of 20 HP or less, generally combined with all the components required to put the into operation.

Ice pack whose limits cannot be seen from ship.

The ratio and percent of the actual delivered capacity (measured at inlet temperature, pressure and gas composition) to the piston displacement.

A pipe lead-in for anchor chain through ship's bow.

When the wind pushes on the wrong side of the sail, causing it to be pushed away from the wind. If the lines holding the sail in place are not released, the boat could become hard to control and heel excessively.

The highest level of cube utilization that can be achieved when loading cargo into a container.

A restrictive tube used in a refrigeration system which restricts the flow of freon and allows pressure to build on one side and suction on the other. It is located between the condenser and the evaporator.

A hole in the hull for mooring lines, cable, or chain to run through.

The stay that the jib is hoisted on. Usually the headstay.

ACRONYM - National Pipe Thread standard. A description of a specific pipe thread

Book in which is kept a reckoning of items of cargo received or discharged from a hatch or vessel.

Abbreviation for "Less than Container Load." The quantity of freight which is less than that required for the application of a container load rate. Loose Freight.

An order to stop; as, "Avast heaving!"

A triangular fore-and-aft sail carried on a stay. A sail that is set on a stay, and not on a yard or a mast. On a cutter this is the sail located between the jib and the main sail