Compass card registers to 90 degrees
Compass card registers to 90 deg
the Fengshui Compass not maritime navigation, but interesting.
Longitude without time a pdf file
CelNav pdf a very large (10 meg) pdf file that is a celestial navigation course developed by the US Coast Guard.
Instruction manual for the Russian sno-t model Sextant - 6 meg pdf file
-
-