LITMIR.BIZ

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Open or opening or opened

      OPR Operator or operate or operative or operating or operational

      OPS Operations

      O/R On request

      ORCAM Originating Region Code Assignment Method

      OTP On top

      P

      P… Prohibited area (followed by identification)

      PANS Procedures for air navigation services

      PAPI Precision Approach Path Indicator

      PAR Precision Approach Radar system

      PCN Pavement classification number

      PDG Procedure design gradient

      PERM Permanent

      PJE Parachute jumping exercise

      PL Ice pellets

      PLA Practice low approach

      PLN Flight plan

      PN Prior notice required

      PO Dust/sand whirls (dust devils)

      POB Persons on board

      PPI Plan position indicator

      PPR Prior permission required

      PRFG Aerodrome partially covered by fog

      PRKG Parking

      PROB Probability

      PROC Procedure

      PROV Provisional

      PS Plus

      PSN Position

      PSP Pierced steel plank

      PTN Procedure turn

      PWR Power

      Q

      QDM Magnetic heading (zero wind)

      QDR Magnetic bearing

      QFE Atmospheric pressure at aerodrome elevation (or at runway threshold)

      QFU Magnetic orientation of runway

      QNH Atmospheric pressure reduced to MSL by ICAO Standard Atmosphere and altimeter sub-scale setting to obtain aerodrome elevation when on the ground

      QTE True bearing from the station

      R

      R Red

      R… Restricted area (followed by identification)

      R… Radial (followed by Mag track

      R Right (runway identification)

      RA Rain

      RAF Royal Air Force

      RAG Runway arresting gear

      RASN Moderate rain and snow

      RCA Reach cruising altitude

      RCAF Royal Canadian Air Force

      RCC Rescue coordination centre

      RCF Radio communication failure message

      RCL Runway centre line

      RDH Reference datum height (for ILS )

      RDL Radial

      RDO Radio

      RE Recent (used to qualify weather phenomena such as rain, e.g. recent rain = RERA)

      REC Receive or receiver

      REF Reference to… or to …

      REG Registration

      REP Reporting point

      REQ Request or requested

      RFL Requested flight level

      RFP Replacement Flight Plan

      RG Range (lights)

      RIF Reclearance öin flight

      RMK Remark

      RNAV Area Navigation

      RNG Radio Range

      ROFOR Route forecast (in aeronautical meteorological code)

      RON Receiving only

      RPL Repetitive flight plan

      RPS Radar position symbol

      RPT Repeat or I repeat

      RQS Request supplementary flight plan message

      RSC Rescue sub-centre

      RSP Responder beacon

      RSR En-route surveillance radar

      RT Right turn

      RTD Delayed (used to indicate delayed meteorological messages)

      RTF Radiotelephone

      RTG Radiotelegraph

      RTT Radioteletypewriter

      RUT Standard regional route transmitter frequencies

      RV Rescue vessel

      RVR Runway visual range

      RWY Runway

      S

      S South or southern latitude

      SA Duststorm, sandstorm, rising dust or rising sand

      SAP As soon as possible

      SAR Search and Rescue

      SARPS Standards and Recommended Practices (ICAO)

      Sat Saturday

      SB Self-Briefing

      SC Straticumulus

      SCT Scattered

      SE Southeast

      SEC Seconds

      SELCAL Selective Calling System ( A system which permits the selective calling of individual aircraft over radiotelephony channels linking a ground station with the aircraft)

      SEP September

      SEV Severe (used e.g. to qualify icing and turbulence reports)

      SFC Surface

      SG Snow grains

      SH Showers

      SHF Super high frequency (3000 –30000 MHz)

      SHRA Moderate rain shower

      SHRASN Moderate shower with rain and snow

      SHSN Moderate snow shower

      SID Standard instrument departure

      SIF Selective identification feature

      SIGMET Information concerning en-route weather phenomena which may affect the safety of aircraft operations

      SIGWX Significant weather

      SIMUL Simultaneous or simultaneously

      SIWL Single isolated wheel load

      SKC Sky clear

      SKED Schedule or scheduled

      SLAP Slot Allocation Procedure

      SMC Surface movement control

      SMR Surface movement radar

      SN

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