Livescope.

I have an Ipilot trolling motor and don't often use the GPS features when actually fishing. I find it far more precise to just drive with the remote and fish with my other hand. I will use spot lock occasionally when I have to deal with a fish, retie, switch rods, etc, and I use autopilot for trolling or just motoring along a bank.

If you're using a trolling motor mount for livescope you typically cannot use it while on spot lock, it just isn't precise enough, livescope has a very narrow beam.