Good point.

Also, if you leave your GPS on and someone goes
overboard, you can reverse your track exactly.

"Scout" wrote

"Bart Senior" .@. wrote
I agree. Most people rely to heavily on these things.
It is important to confirm your position by other means.

Also, most people, I find don't know how to use their
navigation electronics except in a very limited way. For
short trips in known waters it's unnecessary. For more
complicated situations and longer passages, it is a
God-send.

and MOB functions.