Magnetic observations at sea from the USC&GSS BACHE

Magnetic observations at sea from the USC&GSS BACHE. While steaming in a circle, first to the right and then to the left, the ship is steadied successive ly on 8 or 16 equi-distant headings while the sun’s magnetic bearing is observed with the standard compass and the dip and total intensity are determined with a Lloyd-Creak dip circle.

Photo Location: United States Atlantic coast
Photo Date: 1916.

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Author: NOAA Central Library Historical Imagery/ NOAA

License: Public Domain Mark 1.0 (Public domain)

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Added On	16th October 2015
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