Direction Finding DF Indicator of R.1155 Nav-Com System PV-1 Ventura Typically mounted under the wing

Typically mounted under the wing or fuselage of the aircraft

The booklet describes and illustrates a number of aerial tactics in lay terms

The thumbscrew on the end of the device loosens

This is an original WWII-era training booklet published by the US Navy's Aviation Training Division in 1943

When you’re done with the top timer press the left button again

Direction Finding DF Indicator of R.1155 Nav-Com System PV-1 Ventura Typically mounted under the wingHere is a WWII era Direction Finding (DF) Indicator as used in aircraft of the British Royal Air Force, such as bombers Avro Lancaster, Handley Page Halifax, and Vickers Wellington, and patrol bomber Short Sunderland. The DF Indicator received its signal from the R. 1155 receiver in the radio (wireless) comparment. By seeking a signal from a ground transmitter, the indicator displayed the direction of the transmitter in relation to the aircraft by