Altimeter, C-12 Type for Ground Trainer Installation (9100) P-2 Neptune The Turn Control knob rotates

The Turn Control knob rotates

The directional gyro is powered pneumatically

Two of these indicators appeared on the B-50's engineer's instrument panel (see photo)

observers could determine the location of friendly aircraft using triangulation

Altimeter, C-12 Type for Ground Trainer Installation (9100) P-2 Neptune The Turn Control knob rotatesThis is an Altimeter used in Instrument Ground Trainer simulator such as the Link trainer, with a visual presentation similar to the USAAF and USN type C 12 Altimeter. It was electronically controlled and received its input signals from an instructor's control panel. It is in very good condition and is a good substitute suitable for collectors looking to build a replica instrument panel.