(1) (Canada) 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 1hr after the estimated time of arrival (ETA) last notified to or estimated by the ACC, whichever is later; or (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 24hrs 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. See also: Emergency Phase (2) (ICAO) A Situation Wherein Uncertainty Exists As To The Safety of An Aircraft and Its Occupants. See also: Emergency Phase