The American practical navigator, being an epitome of navigation and nautical astronomy (1903)
Bowditch, Nathaniel, 1773-1838, United States. Navy Dept. Bureau of Equipment, Logan, George Wood, 1868-1915 · Washington, Govt. Print. Off. · leaf 70
INSTRUMENTS EMPLOYED IN NAUTICAL ASTRONOMY. 67 division representing 1°; each of these degree divisions is further subdivided to an extent dependentupon the accuracy of reading of which the sextant is capable. In the instruments for finer work, thedivisions of the scale correspond to 10 each, and…
Navigation · Nautical astronomy
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