For a VFR night flight plan, you have entered the departure time of 21:28 local time. This corresponds to 20:28 UTC. Later, you are off blocks at 21:37 and takeoff at 21:41. When the controller asks you to report your "takeoff time", your answer will be?
The controller asks for the take-off time which rules out the answers with the off blocks time:
- 'three seven'
- 'twenty one three seven'
The option ‘twenty one four one’ has a few problems too:
- Time is given using UTC, as shown below in the source material, and this is a local time.
- Time is always given in minutes only unless there is any possibility of confusion. This phrase is often given in the question to indicate that the hour is needed, but is missing here, so just minutes is the correct answer.
- The hour would be given as ‘two one’ and not ‘twenty one’.
ICAO Annex 10 Volume II - Aeronautical Telecommunications
3.4 TIME SYSTEM
3.4.1 Coordinated Universal Time (UTC) shall be used by all stations in the aeronautical telecommunication service. Midnight shall be designated as 2400 for the end of the day and 0000 for the beginning of the day.
5.2.1.4 TRANSMISSION OF NUMBERS IN RADIOTELEPHONY
5.2.1.4.1.4 PANS.— When transmitting time, only the minutes of the hour should normally be required. Each digit should be pronounced separately. However, the hour should be included when any possibility of confusion is likely to result.
| Time | Statement |
| 0920 (9:20 A.M.) | Too ZE-RO; or ZE-RO NIN-er TOO ZE-RO |
| 1643 (4:43 P.M.) | FOW-er Three; or WUN SIX FOW-er TREE |
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