Seems like all the good GPS units are very pricey.
Since you can now save maps to the Android phones, the smart phones are a lot more reliable as GPS units. I have used Google Maps and My Tracks many times on river trips to make sure I found the takeout. I don't think I would count on them if I was in the boonies but they are good enough for paddling near civilization.
Cartop Kayak Carriers
URCHIN Portable Anchor
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