R
Racetrack procedure - A procedure designed to enable the aircraft to reduce altitude during the initial approach segment and/or establish
the aircraft inbound when the entry into a reversal procedure is not practical.
Radar contact - The situation which exists when the radar blip or radar position symbol of a particular aircraft is seen and identified on a radar display
.Radar identification - The process of correlating a particular radar blip or radar position symbol with a specific aircraft
.Radar Separation- Radar spacing of aircraft in accordance with established minima
.Reporting point - A specified geographical location in relation to which the position of an aircraft can be reported
Radio altimeter - Aircraft equipment which makes use of the reflection of radio waves from the ground to determine the height of the aircraft above the surface.
RNAV approach -An instrument approach procedure which relies on aircraft area navigation equipment for navigational guidance
Radio bearing - The angle between the apparent direction of a definite source of emission of electro-magnetic waves and a reference direction asdetermined at a radio direction-finding station
A magnetic radio bearing - is one for which the reference direction is that of magnetic North
A true radio bearing - is one for which the reference direction is that of true North
Runway - A defined rectangular area on a land aerodrome prepared for the landing and take-off of aircraft.
Runway edge lights - are used to outline the edges of runways during periods of darkness or restricted visibility conditions. These lightsystems are classified according to the intensity they are capable of producing
(High Intensity Runway Lights (HIRL
(Medium Intensity Runway Lights (MIRL
(Low Intensity Runway Lights (LIRL
The HIRL and MIRL systems have variable intensity controls, whereas the LIRLs normally have one intensity setting. Runway edge lights are white
except on instrument runways where yellow replaces white on the last 600 metres (2,000 ft) or half the runway length (whichever is less), to form a caution
zone for landings. The lights marking the ends of the runway emit red light toward the runway to indicate the end of runway to a departing aircraft and emit green outward from the runway end to indicate the threshold to landing aircraft.
Runway end identifier lights - REIL - installed at many airports to provide rapid and positive identification of the approach end of a particular runway.
The system consists of a pair of synchronized flashing lights located laterally on each side of the runway threshold. REILs may be either omnidirectional or unidirectional facing the approach area.
Runway visual range - RVR - An instrumentally derived value, based on standard calibrations, that represents the horizontal distance a pilot will see down the runway from the approach end. It is based on the sighting of either high intensity runway lights or on the visual contrast of other targets whichever yields the greater visual range. RVR, in contrast to prevailing or runway visibility, is based on what a pilot in a moving aircraft should see looking down the runway. RVR is horizontal visual range, not slant visual range. It is based on the measurement of a transmissometer made near the touchdown point of the instrument runway and is reported in hundreds of feet. RVR is used in lieu of RVV and/or prevailing visibility in determining minimums for a particular runway.
Runway visibility value - RVV - The visibility determined for a particular runway by a transmissometer.