SNFO/SWSO VOICE COMMUNICATIONS
"BUCK 711, turn left heading 180, descend and
maintain 16,000, altimeter 30.02."
"BUCK 711, left 180, leaving FL 210 for 16,000,
14. Always acknowledge call-ups to your aircraft call sign. If you do not respond, the
controller has no way of knowing whether you received the information or have experienced
107. PHONETIC ALPHABET
To minimize confusion during communication, the FAA uses the International Civil Aviation
Organization (ICAO) phonetic alphabet (Figure 1-2). Air traffic control (ATC) facilities may
also request pilots to use phonetic letter equivalents when aircraft with similar sounding
If control agencies have difficulty in understanding aircraft call signs during initial check in
calls, aircrew can use the phonetic alphabet to spell out the call sign. Additionally, use the
phonetic equivalents for single letters and to spell out groups of letters or difficult words during
adverse communications conditions.
Radio communications have progressed to the point that numbers can be pronounced as you
would in normal conversation. If you are transmitting on a garbled or static filled frequency, the
numeral pronunciations in Figure 1-2 may clarify communication.
"Atlanta Center, KATT 815 request direct to the
ROMEK intersection, then as filed."
"KATT 815, say again the intersection."
"ROMEK intersection, ROMEO-OSCAR-MIKE-
TECHNIQUE AND TERMINOLOGY 1-13