Master Indicator, Type N-1 Compass System plus Service Manual B-29 and if the barrels should

and if the barrels should be depressed or elevated

This is an original 1960's-era Instrument Flight Manual for the Naval Air Training and Operating Procedures Standardization Program (aka NATOPS

P-47 Thunderbolt

Requires the correct electrical input to operate

The USAF type is S3A

Master Indicator, Type N-1 Compass System plus Service Manual B-29 and if the barrels shouldThis is a Master Indicator used in the N 1 Compass System by aircraft of the US Air Force during the 1950's and into the 1960's. The N 1 system is a remote indicating, gyro stabilized compass system designed for use in all latitudes, which is what made it unique at the time. The N 1 system was commonly used in early models of the US Air Force bomber B 52 Stratofortress, transport C 130 Hercules, and air tanker KC 135. It was installed at the