Aviation Communication

Transponder

• Receives an interrogation signal from ground radar unit and replies with a “squawk” signal
  • VFR Squawk Code: 1200
  • Hijacking: 7500
  • Lost Communication: 7600
  • General Emergency: 7700
• Must be tested and inspected within the preceding 24 calendar months

Phonetic Alphabet

Phonetic Number

• 9 = NINER
• Altitude
  • Below 10,000
    • 1,200: one thousand two hundred
  • Above 10,000
    • 10,500: one zero thousand, five hundred
• Decimal as point
  • 124.4: one two four point four

Radio procedures

• You, Me, Where, What, With