Battenberg Course Indicator Mk 5 in Wood Case Wellington

Battenberg Course Indicator Mk 5 in Wood Case WellingtonHere 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,

and P-38 Lightning

vs wings and tailwheel) aircraft

The loop was rotated by a control panel (such as the MN-28

Here is an electric (4V

but it could be cemented in place

The amber lens is removable

and presents it to the pilot visually on the Zero Reader Indicator

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"

5 inches diameter by 2

but cannot directly calculate where a projectile will land because it has no input for velocity or ballistic coefficient