U-boat Celestial Navigation

Cassens and Plath Standard Kriegsmarine sextant, Wempe chronometer and Ernst Schotte & Co. celestial globe aboard U-505

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Download a PDF of the F-Tafel
View a translation of the Introduction including Overview, Explanatory Notes, Worked examples and Notes on each Table
Download F-Tafel sight Reduction form (In German)
Download F-Tafel sight Reduction form (In English)
Download a PDF translation of the Summary of the Usage Instruction for the calculation of position lines by altitude with the F-Tafel
Download a PDF Summary of the Usage Instructions with notes
Example problems
Download a PDF of the 1941 Nautical Almanac
View a translation of the Introduction, Instructions for calculating an altitude position line and Explanation of data and tables
Notes on the F-Tafel by Charles H. Smiley, Brown University (Recent Mathematical Tables, Pages 81-82, American Mathematical Society, 1946)