Back-Taxi - A term used by air traffic controllers to taxi an aircraft on the runway opposite to the traffic flow. The aircraft may be instructed to back-taxi to the beginning of the runway or at some point before reaching the runway end for the purpose of departure or to exit the runway.

Bearing - The horizontal direction to or from any point usually measured clockwise from true north, magnetic north, or some other reference point through 360 degrees.

Brake Horsepower - The power delivered at the propeller shaft (main drive or main output) of an aircraft engine.

Braking Action - A report of conditions on the airport movement area providing a pilot with a degree/quality of braking that he/she might expect. Braking action is reported in terms of good fair, poor, or nil.