Scuba diving with an underwater GPS (sorta) mobile phone in waterproof case & GoPro GPS

Have you ever wanted a GPS that you could take diving with you, now GPS doesn't work underwater (unless you have a tether to the surface) but you can use a GPS device on the surface, so you can pin point where you entered and where you exited the water.

You can deploy the GPS to the surface on a DSMB and then retrieve it to get your current location.

This is limited, but you can do a bit with this low tech solution

You don't need a sim card or the internet to use the GPS

This project was spurred on when I was doing a shore dive and came across a magnificent gorge in relatively shallow water, I haven't been able to find that spot again & I'd love to take some buddies back to that spot, if only I had this GPS with me on that day.

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