Just got my Dakota 20 and as far as touching the screen accidentally you can lock the screen so touching it does nothing by just touching the power button once quickly and letting go. It brings up the screen to adjust backlight and there is a button to lock screen. That way if you put gps into your pocket it doesn't get messed up because screen is now locked. To unlock just touch power button on side again and hit unlock screen. Peace of cake. So far I like it. Iam going to load some maps on mine and switch to auto navigation and see if it can be used for car gps. Oh it does too beep. Beeping can be turn on or off. To me it looks like it can be used for car navigation but I have to try it first to confirm it.
But like I said in post above car gps units go for as little as 50 bucks so better to just get one of those, plus they have full maps were handhelds come with no "REAL" maps installed (unless you get top of line handheld).
Touring Kayak Paddles
EZ-Dock modular docks
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