Beam Approach Visual Indicator Ref 10Q/4 RAF A-30 The left knob rotates the

The left knob rotates the course setting indicator

The manual covers instruments that were eventually used in aircraft of the Air Corps US Army and Air Force US Army during WWII

It was installed at the navigators station

most likely for the benefit of the installers

This is a fine example of the electrical Fl

Beam Approach Visual Indicator Ref 10Q/4 RAF A-30 The left knob rotates theThis is a WWII and Cold War era Beam Approach Visual Indicator, Ref 10Q 4, Mod 27 as used in bomber aircraft of the Royal Air Force such as the Avro Lancaster (see illustration of the Lancaster instrument panel from the Pilots Notes showing the location of the indicator). Per the Rochester Avionics Archives: The Standard Beam Approach System is similar to the ILS system used in Modern aircraft. Beam Approach Beacon System BABS was a homing device used