Well, I did not get to use my GPS Essentials app on Lake St Clair.
Several reasons. The lake was very rough the days we were there, and
when we moved along, we got sprayed with water on a regular basis. Not
an environment for use of an expensive cell phone. Second, it was
difficult to keep the boat on a certain heading given the waves hitting
the boat all the time. Lastly, the guy I went with had a Lawrence fish
finder that you could put GPS coordinates in and it would display where
you were, and where they waypoint was, and show you your path in getting
there (the track). It was waterproof, larger than a cell phone screen
and showed a lot more information. So, we used that. However, on
our smaller lake here in Ohio, I'll give it a try; especially when I'm
using a kayak that won't support the use of something larger.
Thanks to everyone for the help!
Jerry