Another vote for Standard Horizon. I am pretty comfortable navigating by memory and sight on 99% of the lake, and went years without GPS, but I still love the safety and confidence the GPS allows. With nothing more than an occasionally glance at the screen, I can immediately tell if I'm on my charted course/stored track and therefore away from fixed navigational hazards. That allows me to put much more effort into keeping my eye out for dynamic hazards and dangerous situations.
It's not useful on this lake, but another feature of a chartplotter that really shines is the anchor alarm. When I'm asleep at anchor, I leave the gPS running with a preset radius of allowable drift. If I go outside that area, the GPS alarms, letting me know my anchor is no longer doing its job.
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