Altitudes and Flight Levels

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APPENDIX B
T-34C CONTACT
Example: 500 FIVE HUNDRED
4500 FOUR THOUSAND FIVE HUNDRED
Numbers above 9999 shall be spoken by separating the digits preceding the word "thousand."
Example: 10,000 ONE ZERO THOUSAND
13,400 ONE THREE THOUSAND FOUR HUNDRED
All other numbers shall be transmitted by pronouncing each digit.
Example: 10 ONE ZERO
When a radio frequency contains a decimal point, the decimal point is spoken as "point" or
"decimal."
Example: 322.1 THREE TWO TWO POINT ONE
322.1 THREE TWO TWO DECIMAL ONE
3.
Altitudes and Flight Levels
Up to but not including 18,000 feet MSL (FL180), state the separate digits of the thousands, plus
the hundreds, if appropriate.
Example: 12,000 ONE TWO THOUSAND
12,500 ONE TWO THOUSAND FIVE HUNDRED
At and above 18,000 feet MSL (FL180), state the words "flight level" followed by the separate
digits of the flight level.
Example: 19,000 FLIGHT LEVEL ONE NINER ZERO
Feet in MSL (Mean Sea Level) is understood in altitudes; therefore it is not necessary to say
"feet."
4.
Directions
State the three digits of all magnetic courses, bearings, headings, or wind directions. All are
assumed to be magnetic. The word "true" must be added when it applies.
Example:
(magnetic course) 005 ZERO ZERO FIVE
(true course) 050 ZERO FIVE ZERO TRUE
(magnetic bearing) 360 THREE SIX ZERO
(magnetic heading) 100 ONE ZERO ZERO
(wind direction) 220 TWO TWO ZERO
5.
Speeds
State the separate digits of the speed followed by the word "knots." The controller may omit the
"knots" when ordering a speed adjustment: "Reduce/increase speed to one five zero."
Example: 250 TWO FIVE ZERO KNOTS
185 ONE EIGHT FIVE KNOTS
95 NINER FIVE KNOTS

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