Ensign Tim Steele using Pico Rock Drill to set a horizontal control mark.
View looking northeast over Chimney Rock from Midway Rocks in Port Frederick.
Image ID: geod1001, NOAA's Geodesy Collection
Photo Date: 1982 May
Photographer: Commander Grady Tuell, NOAA Corps
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of the U.S. Department of Commerce, National Oceanic & Atmospheric
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