(See RADAR CONTACT LOST.)
(See RADAR SERVICE TERMINATED.)
RMI-
(See RADIO MAGNETIC INDICATOR.)
RNAV-
(See AREA NAVIGATION.)
(See ICAO Term AREA NAVIGATION.)
RNAV APPROACH- An instrument approach procedure which relies on aircraft area navigation equipment for navigational guidance.
(See AREA NAVIGATION.)
(See INSTRUMENT APPROACH
PROCEDURE.)

ROAD RECONNAISSANCE- Military activity requiring navigation along roads, railroads, and rivers. Reconnaissance route/route segments are seldom along a straight line and normally require a lateral route width of 10 NM to 30 NM and an altitude range of 500 feet to 10,000 feet AGL.
ROGER-I have received all of your last transmission. It should not be used to answer a question requiring a yes or a no answer.
(See AFFIRMATIVE.)
(See NEGATIVE.)
ROLLOUT RVR-
(See VISIBILITY.)
ROUTE- A defined path, consisting of one or more courses in a horizontal plane, which aircraft traverse over the surface of the earth.
(See AIRWAY.)
(See JET ROUTE.)
(See PUBLISHED ROUTE.)
(See UNPUBLISHED ROUTE.)
ROUTE ACTION NOTIFICATION- URET notifi-cation that a PAR/PDR/PDAR has been applied to the flight plan.
(See ATC PREFERRED ROUTE
NOTIFICATION.)

(See USER REQUEST EVALUATION TOOL.)
ROUTE SEGMENT- As used in Air Traffic Control, a part of a route that can be defined by two navigational fixes, two NAVAIDs, or a fix and a NAVAID.
(See FIX.)
(See ROUTE.)
(See ICAO term ROUTE SEGMENT.)
ROUTE SEGMENT [ICAO]- A portion of a route to be flown, as defined by two consecutive significant points specified in a flight plan.
RSA-
(See RUNWAY SAFETY AREA.)
RTR-
(See REMOTE TRANSMITTER/RECEIVER.)
RUNWAY- A defined rectangular area on a land airport prepared for the landing and takeoff run of aircraft along its length. Runways are normally numbered in relation to their magnetic direction rounded off to the nearest 10 degrees; e.g., Runway 1, Runway 25.
(See PARALLEL RUNWAYS.)
(See ICAO term RUNWAY.)
RUNWAY [ICAO]- A defined rectangular area on a land aerodrome prepared for the landing and take‐off of aircraft.
RUNWAY CENTERLINE LIGHTING-
(See AIRPORT LIGHTING.)