Radio Magnetic Indicator ID-250/ARN Consolidated 5 inches wide and ~4

5 inches wide and ~4 inches deep

Reference numbers for pilot compasses began with "P") to take navigational bearings in situations where a fixed compass could not be used

This is an electromechanical Ammunition Reserve Counter

This indicator is stamped with the US Navy anchor symbol

The compass has a adjustable glass prism that permits reading of the compass from an angle without having to view from directly overhead

Radio Magnetic Indicator ID-250/ARN Consolidated 5 inches wide and ~4This Cold War Vietnam War era Radio Magnetic Indicator (RMI) ID 250 ARN was made by Bendix for use in aircraft of the US military in the 1950 60's and used in the AN ARN 14 Radio Navigational System (see illustrations). This indicator was commonly used in US Army helicopters such as the UH 1 Bell Huey and the AH 1 Cobra, not to mention the B 52 Stratofortress Bomber (see image of flight panel) and the F 100 Super Sabre jet fighter (see image from