Paragraph 37A Co-ordinated Universal Time, time checks and time accuracyF1

When communicating the time with an air traffic control unit a pilot must use Co-ordinated Universal Time (“UTC”), expressed in hours, minutes and seconds, as used in the 24 hour clock.

Before entering controlled airspace, and at such other times during the flight as may be necessary, the pilot of an aircraft must check the time.

Whenever time is utilised by an aircraft operator in the use of data-link communications, the time must be accurate to 1 second UTC.

In paragraph (3), “data-link communications” means a form of communication intended for the exchange of messages via a data link.