The voiding of a buy or sell.

Hydrographic Office, observed height

An inspection cover or port in an air receiver tank.

Abbreviation for "With Particular Average."

The top of a mast.

Particles of foreign material in a metallic matrix. The particles are usually compounds (such as oxides, sulfides, or silicates), but may be of any substance that is foreign to (and essentially insoluble in) the matrix.

Biofouling means the accumulation of aquatic organisms such as microorganisms, plants, and animals on surfaces and structures immersed in or exposed to the aquatic environment. Biofouling can include microfouling (microscopic organisms including bacteria ...

The ring bolted to the upper end of the shank of an anchor and to which the bending shackle secures.

The process by which small particles suspended in a medium of a different refractive index diffuse a portion of the incident radiation in all directions. In scattering no energy transformation results, only a change in the spatial distribution of the radi ...

An endowment plan which carries an option at maturity for the proceeds to be paid in the form of a.

In the US, the amount (normally fixed) which a policyholder is obliged to pay prior to an.

National Vocational Qualification.

In nautical terminology, a contraction for "weather glass" (a mercury barometer).

Random Access Memory. The memory of a computer which can be read and written into at any location without passing through preceding locations.

A construction element used for ceiling support.

The bridge used for taking observations, or directing the handling of the ship.

See 'personal equity.

Boat carried at davits on quarter of ship, and kept ready for immediate use when at sea.

Routine broadcast of meteorological information for aircraft in flight.

The state of the atmosphere, mainly with respect to its effects upon life and human activities. As distinguished from climate, weather consists of the short-term (minutes to months) variations of the atmosphere.