This is a close-up view of the magnetometer computer screen.
Magnetometer Screen
Image courtesy of the Search for the Lost French Fleet of 1565 Expedition, NOAA-OER/St. Augustine Lighthouse & Museum. Download larger version (jpg, 294 KB).

This is a close-up view of the magnetometer computer screen. It shows a graphic display much like an EKG machine in a hospital. The flatline in this image indicates there is no ferrous material (steel or iron) underneath the magnetometer sensor head.

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