Circular blocks in the shrouds or stays to adjust tension.

A unit of work, being the work done in one hour at the rate of 1,000 watts.

The porous material contained inside the filter to (a) separate the contaminants from the incoming air, gas, or liquid. (b) separate the liquid from the gas. Filter medium is usually made of paper, wire mesh, special cellulose, or a combination.

A line with a weight on the end used to measure depth. The lead is dropped into the water and marks on the line are read to determine the current water depth. The lead usually has a cavity to return a sample of the bottom type mud, sand, etc.

A wind moving from the land to the water due to temperature changes in the evening, where the temperature of the land falls below the sea temperature.

Iron or wood pin fitted into racks, around which lines can be belayed or secured.

Time period from when a compressor loads until it unloads.

To make headway when there is no apparent wind.

A complete listing of all cargo entering the country of discharge. Required at all world ports and is the primary source of cargo control, against which duty is assessed by the receiving country.

To remove a sail.

Limber hole of a ship.

An order to commence ship's work.

Is the temperature at the inlet flange of the compressor.

To leak; take in water.

Fog over land caused by condensation of vapor in the air above cooler ground.

A coupling device which consists of a spring loaded shutoff valve and a positive locking mechanism. It is used to connect tools, hoses and other accessories. Also known as Quick Disconnect.

Is the term used for average atmospheric air at sea level in a temperature zone where it contains some moisture. It is defined in the ASME Test Code For Displacement Compressors as being at 14.696 psiA, 68

On a square-rigged ship, a tackle used for hoisting casks and provisions.

The bottom of the mast, with a shape designed to fit into the mast step.

Order to pick up goods at a named place and deliver them to a pier. Usually issued by exporter to trucker but may apply to a railroad, which completes delivery by land. Use is limited to a few major U.S. ports. Also known as shipping delivery order.