Since the time of Columbus, people have been guided by the stars and it would seem that in the era of GPS and Glonass, people no longer need to look at the stars. However, this is not the case. What is there in common between a simple user of satellite navigation and a great discoverer? In this video we will reveal the secrets of GPS. Unexpected things that you can do with it.

A site where sharks are tracked https://www.ocearch.org/tracker/