blind approach beacon system
Also found in: Acronyms.
blind approach beacon system[¦blīnd ə′prōch ′bē·kən ‚sis·təm]
A pulse-type, ground-based navigation beacon used for runway approach at airports, which sends out signals that produce range and runway position information on the L-scan cathode-ray indicator of an aircraft making an instrument approach. Also known as beam approach beacon system (British usage). Abbreviated babs.