I've been using a Terrova 80 all this year on my 196 Starcraft (19'9").
Unfreekinbelieveable !!
I love the thing for autopilot use when trolling (I have a 9.9 Merc Pro-Kicker for main thrust, and use the Terrova for autopilot steering). I go an entire trip of 3 to 8 hours of trolling without
ever touching the steering wheel !!
For perch fishing I slowly run with my Merc 150 looking for schools of perch on my fish finder. I have the Terrova deployed, but not running. When I spot a school, I hit the "Spot Lock" button, and immediately shut off the 150. The boat automatically turns around and hovers my boat directly over the school.
Holy Cripes, I love this thing !!!!
38+ pounds of walleyes...
Limit of perch 9 to 14"..