BL Aviation Abbreviation

Black

Designation applied to information systems, and to associated areas, circuits, components, and equipment, in which national security information is encrypted or is not processed.

Bill of Lading

A document that establishes the terms of contract between a shipper and a trasportation company. It serves as a document title, a contract of carriage, and a receipt for goods.

Bleec

Blowing

The act of installing fiber optic cable into a duct using air pressure. OR To be in a state of motion. Here action force may be air.

Bale

Package of cargo that is wrapped in canvas, hessian, etc Also old name for bucket, whence 'baler'

Blue

Blowing (METAR descriptor)

Between layers

Butt Line

A curve indicating the shape of an airfoil or nautical equivalent in a vertical plane parallel to the longitudinal axis of the craft or vessel.