Kriegsmarine F-Tafel 1941 III Auflage 2154 u-boot Kriegsmarine arsenal Gotenhafen Wehrmacht panzer gefreiter foto These instruments were commonly used

These instruments were commonly used by the German army during the First World War

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Rare item in good condition

serial number 1751077 and M H6400

Kriegsmarine F-Tafel 1941 III Auflage 2154 u-boot Kriegsmarine arsenal Gotenhafen Wehrmacht panzer gefreiter foto These instruments were commonly usedKriegsmarine F Tafel III. Edition Hamburg 1941. This book is extremely rare and was mainly used by U boat crews. The book was used to determine the exact position of a ship or submarine on the open sea using the stars, the sun, or the moon. Navigators measured the angle of a celestial body above the horizon with a sextant. The F Tafel contained the mathematical tables needed to quickly convert these measurements into usable altitude lines(navigation