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flight plan unique identifier
авіац., Канада	indicatif unique du plan de vol (This abbreviation is pronounced "fe-POO-i")
Англійський тезаурус
flight plan unique identifier
авіац., Канада	An electronically generated numeric or alpha-numeric code that can be used as an ATS system confirmation of message delivery and receipt. It can also be used as a message reference number. For example, when acknowledged by the pilot-in-command PIC, it confirms that an IFR clearance issued to an aircraft via data link under the pre-departure clearance PDC program has been correctly received.