An instrument that uses sound waves to measure the distance to the bottom.

To leave; to push a boat away from a pier or vessel's side.

A source of power (electricity) that can displace power from another source so that source's power can be transmitted to more distant loads.

The ratio of average energy demand (load) to maximum demand (peak load) during a specific period.

Yield calculations on bonds aim to show the return on a gilt or bond as a percentage of either.

Standard Carrier Abbreviation Code identifying an individual common carrier. A three letter carrier code followed by a suffix identifies the carrier's equipment. A suffix of "U" is a container and "C" is a chassis.

A government document which permits the "Licensee" to engage in the export of designated goods to certain destinations.

Line attached to the bottom of the boom used to flatten the sail by pulling the boom down, and thus tightening the luff of the sail. (2) A line used for hauling down a jib or staysail.

Used in meteorology to describe boundaries between hot and cold air masses. This is typically where bad weather is found.

A dimensionless flow parameter, ( Jnr/m), in which J is a significant dimension, often a diameter, n is the fluid velocity, r is mass density, and m is dynamic viscosity, all in consistent units.

To change a boat's direction, bringing the bow through the eye of the wind.

A type of furnace in which fuel is burned and the heat is used to produce steam.

Is the total pressure (static plus velocity) at the inlet flange of the compressor.

Index-linked savings certificates. They were originally introduced for people who were over.

On gaff-rigged sailing vessels the luff of the mainsail is secured to the mast by wooden hoops, which slide up or down the mast as the sail is raised or lowered.

Small line used for whipping other light duties.

This property is the ratio of the specific weight of air or gas to that of dry air at the same pressure and temperature.

A heavy longitudinal timber that angles upward from the stern to support the underside of the fantail.

Passing another vessel.