Navigational Computer, Radar, Doppler, XN-1/APN-67 US Navy C-119 the years of collectivization under

the years of collectivization under the slogan “abolished and joining

The green & red tape markings on the glass indicate the max limits for the aircraft in which it had been installed

Measures ~1

Model A-11-24 likely 1950-1960's vintage

Accurate dead-reckoning capability is provided by an AN/APN-67 Doppler Radar Navigation System

Navigational Computer, Radar, Doppler, XN-1/APN-67 US Navy C-119 the years of collectivization underNow here's a very interesting instrument for our aeronautical navigation historians: The XN 1 APN 67 was a development stage (XN 1 = Experimental Navy, Series 1) navigational computer used in a Doppler radar system in the early 1950's, designed by Ryan Aeronautical, tested in the US Navy's P 2 Neptune, intended for the P6M 1 Seamaster, and eventually used during "Project Magnet" in the R5D Skymaster and the Lockheed NC 121. The computer measures ~8