Navigators Information File, Sept 1944 WWII Grumman The gyro was also named

The gyro was also named as a Type H-5

and Fuel pressure (from 0-25 PSI)

indicating supercharger pressure from -7 to 16 PSI

It measures 2in diameter by 3 in deep

with the pointer rotating once from 0-10

Navigators Information File, Sept 1944 WWII Grumman The gyro was also namedThis is an original WWII era Navigators Information File published in 1944 (updated Sept 1944) by the US Army Air Force. It is the basic reference book for aircraft navigators in the performance of their duties. See photos. The page numbers are by section, so total pages are not estimated here. It is about 1 2 inch thick. All pages are intact as is the soft cover, which has some wearmarks. It is in very good condition given its age.