Dusty
That is a picture I found online and liked the idea of something like that. I think I may actually look into a new GPS next year. My Garmin Vista HCX is only working when it wants to. I will also look at other digital flashers as well at the ice show. Maybe someone will make a unit with GPS, we will have to see.
You can pick up used Lowrance, Humminbird and Garmin GPS units quite cheap and they work very well on the ice. The “touch” HDS units you can use a camera with them as long as its over a 7″ model, you just need to have the camera and an adapter to plug it in.
The GPS in phones are not near as accurate as the GPS units used in a boat for multiple reasons. The screen is so small and they are not using WAAS. Yeah, they may triangulate you off cell towers and satellites, but its not as accurate.
Any GPS is going to be better than nothing and no GPS will get you exactly on the spot just because of the percentage of error unless of course you have a farm or utilities locating GPS.