Battenberg Course Indicator Mk 5 in Wood Case Wellington it was used as a

it was used as a high power jamming transmitter of sufficient power to screen a large bomber within two miles of enemy radar systems operating within its frequency band of 350-800 mc

The compass was illuminated electrically via bulb mounted in a small compartment over the compass itself

569432" and  "General Electric Canada"

vs wings and tailwheel) aircraft

Battenberg Course Indicator Mk 5 in Wood Case Wellington it was used as aHere is an original naval Battenberg Course Indicator Mk 5. The Battenberg course indicator is a mechanical calculating device invented by Prince Louis of Battenberg in 1892 for taking station on other vessels whose range, bearing, course and speed are known. By extension, it has a range of other functions related to relative velocity calculations. A number of versions of the device were produced and it proved particularly useful for station keeping,