US Naval Aviation 1910-60 Vickers Handbook of Operating Instructions for

Handbook of Operating Instructions for AN/APN-1 and AN/APN-1A Aircraft Radio Altimeter system

25 inches diameter and ~4 inches long

Adapter rings were also available for fitment of either A-1 or A-2 tilting heads for use as a fixed gunnery gunsight on attack and light bomber plane(c)

This indicator has 3 calibration screws along each outside edge of the dial

US Naval Aviation 1910-60 Vickers Handbook of Operating Instructions forThis 240 page chronology of US Naval Aviation History, published in 1960, contains all of the key developments in US Naval Aviation since its inception in 1910 through to 1960. It covers all aircraft development from bi planes, float planes, piston aircraft, multi engine aircraft, helicopters, and jets. Also included is the development of aircraft carriers and major battles supported by USN aviation during WWII and Korean War. Its a great historical