Chuck and I refine the accuracy of our drop buoy using the Trimble GPS receiver.
Trimble GPS
Image courtesy of the Search for the Lost French Fleet of 1565 Expedition, NOAA-OER/St. Augustine Lighthouse & Museum. Download larger version (jpg, 345 KB).

Chuck and I refine the accuracy of our drop buoy using the Trimble GPS receiver. This survey-grade satellite positioning system is accurate to within a meter.

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