Join Date: Jul 2007
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Trust your eyes, the "infernal" black box, your ears, your nose, your crew/lookouts, and the hair on the back of your neck. GPS is a great tool and has let millions of people enjoy boating safely and efficiently. The "infernal" black box is not at fault if you have your head buried in the chart plotter, blindly following the bearing to the wrong waypoint. That's operator error.
"Seaman's eye" is the term for constantly comparing what you see to what your instruments---GPS, compass, depth sounder, wind speed/direction---and your senses---visible nav aids, the wind on your face, the color of the water, the feel of the boat, etc., etc, etc,---are telling you.