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![The view through a bridge wing alidade of a lighthouse ahead ship5139.jpg The view through a bridge wing alidade of a lighthouse ahead](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship5139.jpg?itok=UK-8Ew72)
Description
The view through a bridge wing alidade of a lighthouse ahead. When the linebisecting the circle is dead on the desired object, a simultaneous reading ofthe compass circle is made to determine the azimuth to the feature. (Image credit: Crew and Officers of NOAA Ship FAIRWEATHER)
Credit
Crew and Officers of NOAA Ship FAIRWEATHER
Display Date
2010 April 11
Collection
Sailing for Science