Total Calculated Volume

Inshore Traffic Zone. Navigational lane which lies between a TSS and the coast. Can only be used by ships calling a port or place inside the zone.

The source of illumination for an antenna reflector. Also called antenna feed.

The utilization of solar energy through photosynthesis.

Technical Barriers to Trade

Atlantic Ocean Region

Water Line-To-Hatch Coaming

A polariscope consisting of a specially constructed double plate polarizer and a tourmaline plate analyzer. Polarized light passing through the instrument is indicated by the presence of parallel colored fringes, while unpolarized light results in a unifo ...

Bureau Veritas (French Class Society)

A form of movable insulation that uses tiny polystyrene beads blown into the space between two window panes.

Activate, Activation

Old term for the galley of a vessel situated normally on the deck and not between decks.

Final date for delivering cargo to a liner ships.

A tanker of such size as to take commercial advantage under Worldscale (generally, tankers 80,000-119,000 DWT) – A tanker with deadweight of 79,999dwt, however the term Aframax is generally used for tankers in the 50,000 – 100,000dwt capacity range.

Tall and short waves caused by water current and wave directions being opposite to the direction of the wind.

Oil Spill Removal Organization

Arabian Gulf Service.

Ramp fitted to a RoRo ship situated at the rear of the ship.

Butane, See C4H10

Auxiliary Waste Heat Boiler Survey.