GPS is not Radar
Many previous postings on GPS use in the fog.
Last fall there was a weekend where the fog was as thick as pea soup. I was idling to pick up people at a near by dock and a Bass Boat passed me very quickly just a few hundred feet away, I'm sure he was unaware that I was even there.
So please, at night and on foggy days, remember, a GPS only shows your location and not current traffic or floating objects in front of you.
Get radar if you want to glue your eyes to a video screen while underway.
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