The 15.7 million nautical miles of survey lines received from international sources.
Survey Lines
Image courtesy of NCEI. Download larger version (jpg, 238 KB).

This image from the NCEI depicts 15.7 million nautical miles of survey lines received from international sources. Track lines have been enlarged for visibility. Note blank areas on the map include the Arctic and Antarctica regions. These areas have been poorly mapped, and are part of our areas of interest in the campaign.

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