Compass, Hand Bearing, Type O.6.A., Ref 6A/1248, with Original Case JU-52 Shows aircraft deviation from the

Shows aircraft deviation from the selected course

and should be considered a incomplete artifact

which is engaged by turning a small knob on the side

LABS) is a method of bombing where the attacking aircraft pulls upward when releasing its bomb load

That's about all I can determine without having a manual

Compass, Hand Bearing, Type O.6.A., Ref 6A/1248, with Original Case JU-52 Shows aircraft deviation from theHere is a WWII era Hand Bearing Compass, Type O. 6. A., in its original wooden case, as used in aircraft of the British RAF Coastal Command. The 06. A. is hand held compass, used by an observer (hence the "O" designation. Reference numbers for pilot compasses began with "P") to take navigational bearings in situations where a fixed compass could not be used, or to determine correction factors for fixed compasses. The handle holds batteries (not