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required visual reference
авиац., Канада.	référence visuelle requise
Английский тезаурус
required visual reference
авиац., Канада.	In respect of an aircraft on an approach to a runway, the section of the approach area of the runway or the visual aids that, when viewed by the pilot of the aircraft, enable the pilot to make an assessment of the aircraft position and the rate of change of position relative to the nominal flight path in order to continue the approach and complete the landing