Beam Approach Visual Indicator Ref 10Q/4 RAF A-30

Beam Approach Visual Indicator Ref 10Q/4 RAF A-30This 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

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

the A-20 Havoc

indicates the manufacturing year 1944

most likely for the benefit of the installers

The left knob rotates the course setting indicator

This is a fine example of the electrical Fl

See page from F-86 Maintenance Manual dated 1954 showing the location on the instrument panel and confirming the type of the tachometer

BU AERO USNAVY is embossed on its face

and EC-121 aircraft

Judging from the accompanying instructions

or in those without the C-1