I did the handheld GPS and fish finder combo for a while, thought it was ok. When I finally got a combo unit, I realized what I was missing out on. Here's what is different:

  • You can mark waypoints on spots that are behind you but still on the sonar screen
  • Waypoints are more accurate
  • Boat orientation and direction. With handheld, it was nearly impossible to tell which way I was moving in relation to a waypoint when drifting
  • Easier to line up waypoints while motoring

So the GPS combo is definitely the way to go.

Now, if you really want to change your life forever, get a GPS enabled trolling motor. Best money I've ever spent, period.