Thought I would add here that I'm a brand new boater and had the Garmin 50DV installed on our pontoon and really love it--I keep a Bizer laminated map with me to see the bigger picture, but the 50DV shows suggested routes, great down view sonar, and has other goodies like an anchor alarm that tells me we've moved more than a set amount of feet when anchored, etc. Very happy with it.
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