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NOAA Photo Library Image - ship5139

The view through a bridge wing alidade of a lighthouse ahead. When the line bisecting the circle is dead on the desired object, a simultaneous reading of the compass circle is made to determine the azimuth to the feature.

Image ID: ship5139, NOAA's Fleet Then and Now - Sailing for Science Collection
Photo Date: 2010 April 11
Credit: Crew and Officers of NOAA Ship FAIRWEATHER

High Resolution Photo Available





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Last Updated:
November 10, 2017