Since the advent of the plotter we see far less boats on the rocks than before. Used to be you could not go a weekend without seeing or hearing of a grounding on the VHF. From what I see groundings are actually rarer these days than in the days before nearly every boat had a plotter. I can't recall the last time I stepped onto a boat in Casco Bay that did not have a plotter and I am on about 3-10 different boats per week..(Just a personal opinion/observation and I'll shut up, but it seems these contraptions are responsible for more skippers on a shoal, than fog is).