4/20/23 

Pilot/Controller Glossary 

RANDOM ALTITUDE

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 An altitude inappropriate for direction of flight and/or not in accordance with FAA 

Order JO 7110.65, paragraph 4

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1, VERTICAL SEPARATION MINIMA. 

RANDOM ROUTE

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 Any route not established or charted/published or not otherwise available to all users. 

RC 

(See RADIO

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CONTROLLED.) 

RC

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(See ROAD RECONNAISSANCE.) 

RCAG

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(See REMOTE COMMUNICATIONS AIR/GROUND FACILITY.) 

RCC

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(See RESCUE COORDINATION CENTER.) 

RCO

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(See REMOTE COMMUNICATIONS OUTLET.) 

RCR

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(See RUNWAY CONDITION READING.) 

READ BACK

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Repeat my message back to me. 

RECEIVER AUTONOMOUS INTEGRITY MONITORING (RAIM)

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 A technique whereby a civil GNSS 

receiver/processor determines the integrity of the GNSS navigation signals without reference to sensors or 

non-DoD integrity systems other than the receiver itself. This determination is achieved by a consistency check 

among redundant pseudorange measurements. 
RECEIVING CONTROLLER

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 A controller/facility receiving control of an aircraft from another 

controller/facility. 
RECEIVING FACILITY

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(See RECEIVING CONTROLLER.) 

RECONFORMANCE

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 The automated process of bringing an aircraft’s Current Plan Trajectory into 

conformance with its track. 
RECREATIONAL FLYER

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Pilot of a UAS who is operating under 49 USC §44809, Exception for Limited 

Recreational Operations of Unmanned Aircraft. 

REDUCE SPEED TO (SPEED)

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(See SPEED ADJUSTMENT.) 

REDUCED VERTICAL SEPARATION MINIMUM (RVSM) AIRSPACE

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 RVSM airspace is defined as any 

airspace between FL 290 and FL 410 inclusive, where eligible aircraft are separated vertically by 1,000 feet. 

Authorization guidance for operations in this airspace is provided in Advisory Circular AC 91

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85. 

REFINED HAZARD AREA (RHA)

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Used by ATC. Airspace that is defined and distributed after a failure of 

a launch or reentry operation to provide a more concise depiction of the hazard location than a Contingency 

Hazard Area. 

(See AIRCRAFT HAZARD AREA.) 
(See CONTINGENCY HAZARD AREA.) 
(See TRANSITIONAL HAZARD AREA.) 

REIL

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(See RUNWAY END IDENTIFIER LIGHTS.) 

RELEASE TIME

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 A departure time restriction issued to a pilot by ATC (either directly or through an authorized 

relay) when necessary to separate a departing aircraft from other traffic. 

(See ICAO term RELEASE TIME.) 

PCG R

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