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Terms for subject Aviation (1801 entries)

radio beacon	A station transmitting non-directional radio signals
radio direction-finding station	A radio station intended to determine only the direction of other stations by means of transmissions from the latter
radio magnetic indicator	An aircraft navigational instrument that, coupled with a gyro compass or any other compass system, indicates the direction of a selected NAVAID and indicates bearing with respect to the heading of the aircraft
ramp	That part of an aerodrome, other than the manoeuvring area, intended to accommodate the loading and unloading of passengers and cargo; the refuelling, servicing, maintenance and parking of aircraft; and any movement of aircraft, vehicles and pedestrians engaged in services necessary for such purposes
rapid exit taxiway	A long-radius taxiway designed and provided with lighting or marking to define the path of aircraft, travelling at high speed (up to 60 kt) from the runway centre to a point on the centre of a taxiway. The high speed taxiway is designed to expedite aircraft turning off the runway after landing, thus reducing runway occupancy time.
rate one turn	The turn rate of 3° per second normally used by aircraft operating at less than 250 kt
rate one-half turn	The turn rate of 1.5° per second normally used by aircraft operating at approximately 250 kt or more.
rated coverage	The area surrounding a non-directional beacon (NDB) within which the strength of the vertical field of the ground wave exceeds the minimum value specified for the geographical area in which the NDB is situated
RCP	Reliability Control Program
readback	A procedure whereby the receiving station repeats a received message or an appropriate part thereof to the transmitting station so as to obtain confirmation that the message was received correctly
real time OS	RTOS system	Michae­lBurov
real-time OS	RTOS system	Michae­lBurov
rebkrestr	rebook restricted	4uzhoj
rebkrestr	rebook restricted	4uzhoj
RECAT project revising wake turbulence categories to gain capacity	RECAT project	Michae­lBurov
receiver autonomous integrity monitoring	A technique whereby an airborne global navigation satellite system (GNSS) receiver/processor autonomously monitors the integrity of the navigation signals from GNSS satellites. Part of the aircraft-based augmentation system (ABAS)
receiver only	The capability to receive radio communications only, owing to the absence or failure of the transmitter
reciprocal tracks	An expression used by ATS in the application of separation to indicate tracks that converge or diverge at an angle of 136° to 180° inclusive
record locator	RLOC	Ying
reduced vertical separation minimum	The application of 1000-ft vertical separation at and above FL 290 between aircraft approved to operate in reduced vertical separation minimum airspace