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Bubble Sextant

Catalogue number:
NASM 1977-2122

Inscriptions:
"Felsenthal Inst. Co."

Discussion:
This is a very simple plastic sextant with a bubble-type artificial horizon below the horizon glass. The rim is graduated every degree from -5^o to +115^o and read by vernier to 6 minutes of arc. It was made for the Naval Electronics Supply Office in Great Lakes, Illinois, in 1972, and transferred to the Smithsonian in 1977.

Further Information:

Felsenthal
Aircraft Sextant