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uncertainty phase stresses
avia.	стадия неопределённости
mil., avia.	слово-код для обозначения предполагаемой аварийной ситуации; этап неопределённости
English thesaurus
uncertainty phase
avia., avia., ICAO	A situation wherein uncertainty exists as to the safety of an aircraft and its occupants
avia., Canada	A phase that begins when: a with the exception of an arrival report, no communication has been received from an aircraft within 30 min after the time a communication should have been received, or from the time an unsuccessful attempt to establish communication with such aircraft was first made, whichever is the earlier; b a flight plan FP has been filed and no arrival report has been received by the area control centre ACC i within 1 hr after the estimated time of arrival ETA last notified to or estimated by the ACC, whichever is later; ii at the search and rescue SAR time requested by the originator,whichever is earlier; c a flight itinerary FI has been filed and no arrival report has been received by the ACC i within 24 hrs after the latest ETA; or ii at the SAR time requested by the originator, whichever is earlier; d an FP or FI has been filed and it is determined that no arrival report can be expected either because there is no communication system serving the point of arrival or the system serving the airport is inoperative

uncertainty phase: 2 phrases in 2 subjects

Electronics	1
Technology	1