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Wiredrag
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Coast-Geodetic-Survey
Nautical Charting
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Wiredrag
Diagram of wiredrag operations ca. 1980.Basically the same system as devised in the early Twentieth Century
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Diagram of wiredrag operations ca. 1980.Basically the same system as devised in the early Twentieth Century
3/20/2019 1:34:57 PM
Credit:
NOAA Office of Coast Survey
Subject:
Charting
Subject:
Soundings
Subject:
Wiredrag
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