the control and navigation of an aircraft by reference to its gauges, with no or only limited visual reference outside the cockpit.
A Brief History Of Writing InstrumentsThe quill fueled most written communication from the 6th to the 19th century. Quills were made of hollow bird feathers, most commonly goose feathers.
Origin of instrument flying
First recorded in 1925–30
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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