Air Navigation Computer MB-4A, Dead Reckoning, with Dietzgen Divider Regia Aeronautica The label stating TURN PUMP

The label stating TURN PUMP OFF AT 2000

this Gyro Horizon was ubiquitous in its use

Operability unknown

it is in exceptional condition for its age

dated November 1962 with updates as of April 1966

Air Navigation Computer MB-4A, Dead Reckoning, with Dietzgen Divider Regia Aeronautica The label stating TURN PUMPHere is an Air Navigation Computer as used by US Air Force navigators from 1940 ~1980 for dead reckoning navigation. This one appears to be from the 1950's. Included with the computer is a 14 inch Plotter Type PLU 1 C, and a Dietzgen Divider in an aluminum tube, for measuring and repeating distances on a map. Computer measures ~5. 5 inches wide and ~12 inches long in its case.