Chuck prepares to enter the water with the handheld magnetometer.
Magnetometer
Image courtesy of the Search for the Lost French Fleet of 1565 Expedition, NOAA-OER/St. Augustine Lighthouse & Museum. Download larger version (jpg, 365 KB).

Chuck prepares to enter the water with the handheld magnetometer to see if we can better identify the exact spot of the strongest magnetism from our target.

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