Ratio between measured shaft power and the adiabatic compression power, referring to measured mass flow.

A special form of the aspiration psychrometer. developed by Assmann, in which the thermometric elements are well shielded from radiation. Psychrometric measurements may be taken with the instrument in the presence of direct solar radiation.

Subcommittee on Radio Communication and Search and Rescue (IMO)

A hygrometer in which the sensitive element is a strand or strands of human hair, the length of which is a function of the relative humidity of the air.

A time draft (or bill of exchange) that the drawee (payer) has accepted and is unconditionally obligated to pay at maturity.- Broadly speaking, any agreement to purchase goods under specified terms.

Nautical Institute Headquarters, London

Bolts that secure the planks to the timbers.

A term from Latin meaning, "according to value."

Panamax Plus are all Panamax ships authorised for fresh water draft greater than 12.04m up to 15.2m and approved for transit in the new locks.

See river basin.

A hole in a tank, boiler or compartment on a ship, designed to allow the passage of a man for examination, cleaning, and repairs.

A steam boiler on a ship deck used to supply steam to deck machinery when the main boilers are shut down.

The device in an air conditioner that distributes the filtered air from the return duct over the cooling coil/heat exchanger. This circulated air is cooled/heated and then sent through the supply duct, past dampers, and through supply diffusers to the liv ...

Very High Frequency. (30-300 MHz) Designate also the radio communication apparatus using this frequency. It reaches only slightly beyond the horizon, except in favourable circumstances where transmission up to several hundred miles are possible.

A method of streamflow routing which assumes that storage is a linear function of the weighted flow in the reach and is adaptable to a simple mathematical solution.

Office of Foreign Assets Control

Said of a rope when it is under such tension that it is practically rigid.

System

Inmarsat Mobile Number

A term used to describe the takeover of a company by another which might be by agreement or. Acquisition The selection of the target vessels requiring a tracking procedure and the initiation of their tracking.