Here is a horror story of a guy who misused technology, when simply using his eyes, ears and common sense probably would have kept him safe. It also demonstrates how worthless certificates can be.
For those who will say "don't criticize others", save your post. Several professionals went out of their way to save this guy from himself, and he still managed to hit a ship!
Please....Learn the rules of the road and how to handle your boat before even considering using GPS or other technology. If you can't hear your radio (VHF not
AM/FM) while motoring, it's worthless.
Oh...and look out of the cockpit once in a while!
Transportation Safety Board of Canada - Marine Investigation Report M05L0192