Within a few moments they had gathered around the device that Csongor had noticed. Identifying it as a GPS unit had actually required some careful observation. It was crude and industrial-looking compared to the units with big color screens that some people had in their cars. This one’s screen was tiny and gray and showed only those details of interest to mariners: coastlines, shallows, and buoys. But the latitude and longitude were clearly displayed as long strings of digits across the bottom, and the crude outlines and symbols on the screen were creeping upward as the boat moved south.