Microorganisms that live in oxygen deprived environments.

The limiting values of ceiling, visibility, and wind, or runway visual range, established as safety minimum for aircraft landings and take-offs.

Marine Coastguard Agency

A description or explanation of the manner in which the height of the ceiling is determined, i.e. aircraft ceiling, balloon ceiling. estimated ceiling, indefinite ceiling, measured ceiling, precipitation ceiling.

Zinc oxide: the powdery product of corrosion of zinc or zinc-coated surfaces.

A type of climatic diagram whose coordinates are some form of temperature vs. a form of humidity or precipitation.

Wrecked

Energy required to operate mechanical components of an energy system, or a source of energy or energy supply system to back-up another.

A wind blowing in the same direction as the heading of a moving object. thus assisting the object's intended progress. The opposite of a head wind.

It used to be the case that you could only receive your pension from a personal pension plan by.

Pertaining to measurements or devices in which the output varies continuously, i.e. voltage or rotation signals. Compare to digital.

To sail large, with wind about four points abaft beam.

The relative humidity above which the atmospheric corrosion rate of some metals increases sharply.

A type of heat pump that transfers heat in outdoor air to water for space or water heating.

PFD Manufacturers Association

The property of a material by virtue of which deformation caused by stress disappears upon removal of the stress. A perfectly elastic body completely recovers its original shape and dimensions after release of stress.

Nippon Kaiji Kyokai (Japanese Class Society)

See bimetallic thermometer.

Any person on board other than the master and members of the crew or other persons employed or engaged in any capacity on board a ship on the business of that ship.

General Council of British Shipping