Robert Livingston wrote: > You are assuming that the chart is accurate and they generally are. But > you have to recognize that if you are relying on every rock to be within > 100 feet of where the GPS would put it that you might run into an area > that the map makers were in error. These are not regions that commercial > traffic is very interested in. So you have to stay alert. I'd like to reinforce this. One day, while gunkholing its shore, I found several near-surface underwater rocks just off Gibraltor Island, in the Broken Group, Vancouver Island, which were mis-charted by 100 feet or more. Not an issue for me that day, but a good caveat for future dependency on a GPS. Better to mainly depend on your eyes, and glance at the GPS now and then to confirm what you see, or to see if there is a hidden rock in the vicinity. Robert's description of using his GPS to route-find through a reef maze to a safe harbor was a telling illustration, also, of the value of a unit. I'd want a chart on deck, too, in case the thing cratered mid-passage, so I could patch my way through the old way. I really like charts, and enjoy matching what is on the chart to what I see. For me, the GPS is mostly a tool. Some days, I leave it home, to get away from looking at that blame screen! -- Dave Kruger Astoria, OR *************************************************************************** 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/ ***************************************************************************Received on Mon Jan 01 2007 - 14:10:11 PST
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