pl23_theb0904.jpg
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https://www.noaa.gov/media/digital-library-photo/pl23theb0904jpg-0Description
Leadline survey from catamaran hull.
Credit
1942 Hydrographic Manual
Location
Alaska
Collection
Historic Coast & Geodetic Survey
Nautical Charting
Soundings
Casts of the Lead
Keywords
Charting
Boats
Sounding
Leadline