AIM
4/20/23
4
−
2
−
7
Radio Communications Phraseology
4
−
2
−
8. Figures
a.
Figures indicating hundreds and thousands in round number, as for ceiling heights, and upper wind levels
up to 9,900 must be spoken in accordance with the following.
EXAMPLE
−
1.
500
five hundred
. . . . . . . .
2.
4,500
four thousand five hundred
. . . . . .
b.
Numbers above 9,900 must be spoken by separating the digits preceding the word “thousand.”
EXAMPLE
−
1.
10,000
one zero thousand
. . . . .
2.
13,500
one three thousand five hundred
. . . . .
c.
Transmit airway or jet route numbers as follows.
EXAMPLE
−
1.
V12
Victor Twelve
. . . . . . .
2.
J533
J Five Thirty
−
Three
. . . . . . .
d.
All other numbers must be transmitted by pronouncing each digit.
EXAMPLE
−
10
one zero
. . . . . . . . . . .
e.
When a radio frequency contains a decimal point, the decimal point is spoken as “POINT.”
EXAMPLE
−
122.1
one two two point one
. . . . . . . . .
NOTE
−
ICAO procedures require the decimal point be spoken as “DECIMAL.” The FAA will honor such usage by military aircraft
and all other aircraft required to use ICAO procedures.
4
−
2
−
9. Altitudes and Flight Levels
a.
Up to but not including 18,000 feet MSL, state the separate digits of the thousands plus the hundreds if
appropriate.
EXAMPLE
−
1.
12,000
one two thousand
. . . . .
2.
12,500
one two thousand five hundred
. . . . .
b.
At and above 18,000 feet MSL (FL 180), state the words “flight level” followed by the separate digits of
the flight level.
EXAMPLE
−
1.
190
Flight Level One Niner Zero
. . . . . . . .
2.
275
Flight Level Two Seven Five
. . . . . . . .
4
−
2
−
10. Directions
The three digits of bearing, course, heading, or wind direction should always be magnetic. The word “true” must
be added when it applies.
EXAMPLE
−
1.
(Magnetic course) 005
zero zero five
. . . . . .
2.
(True course) 050
zero five zero true
. . . . . . . . . .
3.
(Magnetic bearing) 360
three six zero
. . . . .
4.
(Magnetic heading) 100
heading one zero zero
. . . . .