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| Explanation of Data Designators T1T2A1A2ii CCCC |
| TABLE D3 Level designator ii (when T1T2= FA, UA) |
| Instructions for the proper application of the level designators |
| (1) |
Noting that there is no known use of the series 80-99 for T1T2=UA, these series are allocated to routine aircraft reports up to 1 September 2008. After 1 September 2008, the series should be reserved for future use. |
| T1T2 |
Level Designator ii |
Data Type |
Code Form (name) |
| FA |
01-49 |
Aviation area /advisories |
FM 53 (ARFOR)/[text] |
| FA |
50-59 |
GAMET |
[TEXT] |
| FA |
60-99 |
Not assigned |
Not assigned |
| UA |
01-59 |
Routine aircraft reports |
ICAO AIREP |
| UA |
60-69 |
Special aircraft reports, except for volcanic ash |
ICAO AIREP |
| UA |
70-79 |
Special aircraft reports related to volcanic ash |
ICAO AIREP |
| UA |
80-99 |
Reserved for future use |
ICAO AIREP |
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