Aircraft Communications

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Aircraft Communications
-Using 2-way Radio
Communications
in Aviation
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VHF Radio Frequencies 118.0 - 135.975 MHz

• Advantage- Clear channels with little
  interference. Weather does not produce static
• Disadvantage- Limited to Line-of-sight
• i.e. 3000 feet above level ground--39 miles

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How do we pronounce the letters? (
Alphanumerics )
A- ALPHA J- JULIETT S - SIERRA B- BRAVO K-
KILO T- TANGO C- CHARLIE L- LIMA U-
UNIFORM D- DELTA M - MIKE V- VICTOR E-
ECHO N- NOVEMBER W- WISKEY F- FOXTROT O-
OSCAR X- X-RAY G- GOLF P - PAPA Y- YANKEE H-
HOTEL Q - QUEBEC Z- ZULU I- INDIA R- ROMEO

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Uses of Letters

• Runways -L, R, C (I.e Runway 28L)
• Taxiways (I.e. taxiway Lima)
• Aircraft Call Signs (N45RW) November four five
  Romeo Wiskey)
• Sequence of ATIS - Automatic Terminal Information
  Service at larger airports
• (I.e. one -Information Alpha)
• UTC ( time in Zulu)

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AltitudesWhat is ATIS ?

• Automatic Terminal Information Service-
• Is a frequency available at a busy airport in
  which a pilot can receive recorded information
  about the weather, notices about the airport, and
  any other important information.

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Numbers

• Call Signs
• Private Civilian Airlines
  MilitaryN12345H UA454
  Viper 40
• Times In UTC at Greenwich, UK (always
  pronounced individually)
• (There are 4 times zones in the U.S. each must
  adjust to UTC differently...next page)

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Time Zones- Added hours from GMT (5,
6, 7 or 8 as indicated !)
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Frequently used Frequencies

• 121.5 - VHF Emergency
• 122.0 - Flight Watch (the weather channel)
• 123.6 - FSS enroute
• 122.7, 122.8 122.9 CTAF (common traffic
  advisory frequencies)

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Common Traffic Advisory Frequencies (used when
there is no tower)

• Abbrev. CTAF
• Self-Announce Concept
• Preface all transmissions with ___traffic
• Alert other pilots and traffic of your location
  and intentions
• Similar to UNICOM- Universal Communications
• 122.9, 122.8 122.7 MHz

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Common Phrases

• Affirmative- yes
• Negative- no
• Say Again- repeat last transmission
• Roger- I understood the last transmission
• Wilco- I will comply
• Over- I am finished- a response is expected
• Out- I am finished- no response expected

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Air Traffic Control Facilities (3 types)
Nicknames/Callsign