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ICAO

Aviation DictionaryAeronautical Abbreviation Dictionary
International Civil Aviation Organization
Aviation DictionaryPANS HAM Codes
1. The meanings of the Aeronautical Code signals were assigned by ICAO. Since, in general, only stations of the Aeronautical Service will have available copies of the Aeronautical Code it should not be used in communications with stations of other services unless it is known that the station concerned is familiar with the code.
2. Q signals may be amplified or completed by the addition of appropriate location indicators, approved abbreviations, signals, call signs, figures or numbers.
2.1. The information necessary to complete a signification, as indicated by a blank space, shall be given except when:
(a) The blank spaces are enclosed within parentheses to indicate that their completion is optional.
(b) an alternative meaning shown in parentheses is selected and the blank space in this alternative meaning is completed.
2.2. The information used to complete the blank spaces shall be sent immediately after the Q signal in the sequence shown in the signification.
2.3. Expressions or words in parentheses which do not include blank spaces have the following significance
(a) when following a blank space, the explanation of the information to be used in filling in the preceding blank.
(b) when following a word or expression, an alternative to the word or expression.
2.4. Q signals shall be read as a question when followed by a note of interrogation signal (IMI). When a signal is used as a question and is followed by additional or complementary information, the note of interrogation signal shall follow this information.
2.5. Q signals that are capable of being given an affirmative or negative sense shall be read in the appropriate sense when immediately followed by the signal YES in the case of the affirmative or the signal NO in the case of the negative.
2.6. Q signals used in the aeronautical service that are capable of being given the sense of an order shal be read in this sense when immediately followed by the signal ORD.
2.7. Q signals with numberes alternative significations shall be followed by the appropriate figure to indicate the exact meaning intended. This figure shall be sent immediately following the Q signal.
2.8. All times shall be given in Greenwich Mean Time (GMT) unless otherwise indicated in the question or reply.

See also: D140 , C101 , M17 , L G , H111

 

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A: Page 1 of 15.

A
A Multi
A C
A D
A D Conv
A DC
A FD
A G
A L
A R
A S
A SKID
A T
A THR
A XFMR
A1
A10
A109
A119
A122
A124
A129
A139
A140
A19
A20
A21
A210
A211
A22
A225
A23
A25
A27
A270
A3
A306
A30B
A310
A318
A319
A320
A321
A332
A333
A342
A343
A345
A346
A37
A3ST
A4
A50
A500
A504
A6
A660
A7
A748
A890
A9
A900
A960
AA
AA1
AA5
AAAE
AAE
AAF
AAI
AAJ
AAL
AAM
AAQ
AAR
AAS
AAW
AAY
AB
AB Airlines
AB11
AB15
AB18
AB95
ABB
ABC
ABDR
ABL
ABO
ABR
ABS
AC
AC11
AC50
AC52
AC56
AC68
AC6L
AC72

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