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11.2.2.7 Termination of Distress Communications and of Silence . 83
11.2.3 Urgency procedures ..................................................................... 83
11.2.3.1 Action by the Aircraft Reporting the Condition ............... 83
11.2.3.2 Action by the Station Adressed or the first Station
Acknowledging the Urgency Message ............................ 84
11.2.3.3 Action by All Other Stations ........................................... 84
11.2.4 Medical transports ...................................................................... 84
11.2.4.1 Action by the Aircraft used for Medical Transports ......... 84
11.2.4.2 Action by the Station Adressed or by other Stations
Receiving a Medical Transports Message ....................... 85
11.3 Communications Related to Acts of Unlawful Interference ..................... 85
12. IFR ........................................................................................... 86
12.1 Callsigns ................................................................................................. 86
12.1.1 Heavy ......................................................................................... 86
12.1.2 Change Call Sign ......................................................................... 86
12.2 Level Reporting ...................................................................................... 86
12.2.1 Vertical Position ......................................................................... 86
12.2.1.1 Standard Pressure Setting (SPS) .................................... 87
12.2.1.2 QNH ............................................................................. 87
12.2.1.3 QFE .............................................................................. 87
12.2.1.4 Examples...................................................................... 87
12.3 Position reporting .................................................................................. 88
12.3.1 Exemptions ................................................................................ 88
12.4 MET Reports .......................................................................................... 88
12.4.1 Requirement .............................................................................. 88
12.4.2 Content of Routine MET Reports ................................................. 89
12.4.2.1 Special MET Reports ..................................................... 89
12.5 Communication Failure under IFR ........................................................... 89
12.5.1 IFR in VMC .................................................................................. 90
12.5.1.1 IFR in IMC ..................................................................... 90
12.6 SELCAL ................................................................................................... 91
12.5.1 TCAS/ACAS Phraseologies ........................................................... 92
12.7 IFR Flight Profile ..................................................................................... 93
12.8 NDB Approach Profiles ........................................................................... 96
13. VHF Propagation ..................................................................... 97
13.1 Radio waves .......................................................................................... 97
13.1.1 Polarization ............................................................................... 97
GEN radio 2025 - Midtjysk Flyveskole 8