CAP 413
Radiotelephony Manual
Chapter 1 Page 9
OCA/H
Obstacle Clearance Altitude/Height
OPC
Operational Control Communications
OCU
Operational Conversion Unit (M)
P
PAPI*
Precision Approach Path Indicator (pronounced PAPI)
POB
(Total) Persons on Board
PAR
Precision Approach Radar (M)
Q
QDM
Magnetic heading (zero wind) (Sometimes employed to indicate
magnetic heading of a runway)
QDR
Magnetic bearing
QFE
Altimeter subscale setting to indicate height above either aerodrome
elevation, or threshold elevation, or helideck elevation
QNE
Landing altimeter reading when subscale set 1013 hectopascals
QNH
Altimeter subscale setting to indicate elevation (AMSL) when on the
ground and altitude in the air
QTE
True Bearing
R
RA
Resolution Advisory (see TCAS)
RCC
Rescue Co-ordination Centre
RPS
Regional Pressure Setting
RTF
Radiotelephone/Radiotelephony
RVR
Runway Visual Range
RVSM
Reduced Vertical Separation Minima (pronounced Ahh Vee Ess Emm)
S
SAR
Search and Rescue
SBAS*
Satellite-based augmentation system (pronounced ESS-BAS)
SID*
Standard Instrument Departure
SIGMET*
Significant information concerning en-route weather phenomena which
may affect the safety of aircraft operations
SRA
Surveillance Radar Approach
SSR
Secondary Surveillance Radar
17 November 2011
Summary of Contents for 413
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