the control and navigation of an aircraft by reference to its gauges, with no or only limited visual reference outside the cockpit.
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How to use instrument flying in a sentence
At Gunter we started formation flying, night flying and instrument flying.The Biography of a Rabbit | Roy Benson
British Dictionary definitions for instrument flying
the navigation of an aircraft by the use of instruments only
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012