I use the Magellan "Map 410." It is supposed to be water and dust proof. I have tested the dust proof more than the water proof, but so far so good. There are charts that can be down loaded. I can recommend you explore this unit as an option. My experience, however, is too limited to go beyond this. JKL *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************
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