Sometimes foreign charts are reproduced by NGA. On such a chart a wire dragged (swept) area may be shown in purple or __________.
Official USCG Answer & Rule Citation
Correct Answer: Option B — green
National Geospatial-Intelligence Agency (NGA) standards dictate that wire-dragged or swept areas on foreign-reproduced nautical charts are highlighted in green to alert mariners of specific clearance depths verified by mechanical sweeping.
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