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![GPS satellite receiver unit set up over a bench mark cgs02644.jpg GPS satellite receiver unit set up over a bench mark](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_cgs02644.jpg?itok=0Rbzt00R)
Description
GPS satellite receiver unit set up over a bench mark. At first glance, appearsto be a tripod. However, it has a fourth leg that is placed directly over themark. (Image credit: Crew and Officers of the NOAA Ship FAIRWEATHER)
Credit
Crew and Officers of the NOAA Ship FAIRWEATHER
Collection
Historic Coast & Geodetic Survey