American practical navigator: an epitome of navigation and nautical astronomy (1914)
Bowditch, Nathaniel, 1773-1838, Logan, George Wood, 1868-1915, United States. Navy Dept. Bureau of Equipment · Washington, Govt. Print. Off · leaf 203
e located by its use. 429. As this instrument is not made with both right and loft arms capable ofbeing set to small angles down to 0°, the manufacturers make protractors witheither small right or small left angles. Surveying parties should be equipped withboth. In default of a three-armed… … MARINE SURVEYING. 197
Navigation · Nautical astronomy
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
