A light sail, such as a spinnaker, used to make the most of light following winds.

A measure of the efficiency of converting a fuel to energy and useful work; useful work and energy output divided by higher heating value of input fuel times 100 (for percent).

Seaman's scornful name for any lead of a rope by which effort is lost or wasted.

Programs or instructions which are stored in readonly memory.

A compulsory tax on employment and investment income.

A compressor belonging to the group of displacement reciprocating compressors.

The actual time during which physical events take place.

An alloy of lead containing 3 to l5% Sn, used as a hot dip coating for steel sheet or plate. Terne coatings, which are smooth and dull in appearance, give the steel better corrosion resistance and enhance its ability to be formed, soldered, or painted.

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

A type of instrument shelter. It is a wooden box painted white with double louvered sides and mounted on a stand four feet above the ground.

Income received from property letting is subject to income tax. The amount taxable is the amount.

A labyrinth type filter having the active surfaces continuously splashed with oil. Most pollutants are absorbed by the oil which when circulated releases its pollutants, which sink by gravity to the bottom of the oil pan.

A location that is not sheltered from the wind and seas. An open location would not make a good anchorage.

Pounds.

An indicator that signals pressure conditions.

A card marked in degrees and having sightings on it that is used to take bearings relative to the ship, rather than magnetic bearings as taken with a compass.

A solar water or space-heating system in which solar energy is collected, and/or moved by natural convection without using pumps or fans. Passive systems are typically integral collector/storage (ICS; or batch collectors) or thermosyphon systems. The majo ...

A genoa jib. A large jib that overlaps the mast.

The cost of trading in an asset or security which will vary according to the broker you use and.

The government department which collects customs and excise duties and.