Battenberg Course Indicator Mk III, Mounted for Display A-35 Vengeance and the night-fighter N versions

and the night-fighter N versions equipped with AN/APS-6 radar system

It is full of illustrations and diagrams

part number 586BK-028

with a Serviceable Part tag dated Aug 1945

Battenberg Course Indicator Mk III, Mounted for Display A-35 Vengeance and the night-fighter N versionsHere is an original naval Battenberg Course Indicator Mk III. 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