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Originally Posted by marcucci
"...no one said why you should not rely on a GPS and/or radar to navigate winnipesaukee.
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The archives indicated that in a time of national emergency, non-licensees (that's you) GPS' accuracy can go from 3-foot accuracy to 1000-feet.
Some folks who navigate ocean waters carry two GPS units. Things can go awfully wrong.
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I found out that radar has a "dead spot" around the boat of several feet and much further if the radar is up high.
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1) That's true. CL is also right about the hazard to people of using radar at the dock. (You may be able to detect non-compliers by hearing "radar zap" noise on your radio).
2) Radar's reliability also diminishes in rough-water conditions.
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"...a huge cruiser almost ran me and my wife down.
Again, your eyes are invaluable for navigation!
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With the increased installation/use of cellphones, stereos, DVDs, GPS, radar, VHF, and other distractions (like liquor) in today's boats, your eyes could very well save you.
I carry an old CD as a signaling mirror for sunny days and moderate seas -- when most collisions occur. It seems to help when in doubt on that approaching monster.
Boating has changed. You're right to be wary.
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