Value of soil moisture, expressed as a percentage of the mass of dry soil, below which a plant living in the soil dies by wilting.

Person given a passage in one of H.M. ships; usually on compassionate grounds.

One of the 4 cardinal compass points. North is the direction toward the North Pole and is at 0

A heavy colorless gas that does not support combustion but is formed by the combustion and decomposition of organic substances. Found in some ambient air conditions.

The fine liquid or solid particles contained in combustion gases. The quantity and size of particulates emitted by cars, power and industrial plants, wood stoves, etc are regulated by the U.S. Environmental Protection Agency.

Full Operational Status

A knot used to tie two lines together.

Cylindrical Water-Tube Boiler Survey.

Is singular for media and is the material...paper, wire, cellulose or a combination... from which the filter element is made and which does the actual filtration or separation.

The structure of a prepared surface of a metal as revealed by a microscope at a magnification exceeding 25x.

Letters, numbers, and other symbols placed on cargo packages to facilitate identification. Also known as marks.

Is a positive displacement rotary compressor.

Any material that has a limited capacity for conducting an electric current. Certain semiconductors, including silicon, gallium arsenide, copper indium diselenide, and cadmium telluride, are uniquely suited to the photovoltaic conversion process.

A rail around the mast or on the bulwarks with holes for belaying pins to which lines or halyards are attached.

A measure of the intensity of gusts given by the ratio of the total range of wind speed between gusts and the intermediate periods of lighter wind to the mean wind speed, averaged over both gusts and lulls.

Long Ton/Miles

A unit of volume. A US gallon has 231 cubic inches or 3,785 liters.

An item such as a nail, screw, rivet or other device used to fasten objects together.

A product of crude oil that is used for space heating, diesel engines, and electrical generation.

see 'balance of.