Radar advisory

RADAR ADVISORY- The provision of advice and information based on radar observations.
(See ADVISORY SERVICE.)
RADAR ALTIMETER- ...

RAS (2) - Radar Advisory Service. Provided outside regulated airspace to notify pilots of conflicting traffic and to advise suitable avoiding action. Also RASA Radar Advisory Service Area.

LARS - Lower Airspace Radar Advisory service, available to all aircraft flying in uncontrolled UK airspace from 3,000 feet amsl to FL95. See also MMARS, RAS and RIS, below.
lat - latitude.

See also: Radar, Aircraft, Direct, Service, Navigation