The difference should not be more than 2Ad. ... Any repair or other attention which a compass may be found to need should only be carried out by a properly equipped compass-repair shop or by ... Instructions for the adjustment of the compass are given in the Air Ministrya#39;s aquot; Instrument Manualaquot; (A.P. 1275). K.B.B. AIR SIGHT The K.B.B. air sight is an entirely K.B.B. AND K.B.B.-KOLLSMAN INSTRUMENTS 27.
|Author||:||Ernest Walter Knott|