Originally Posted by boatpoker
Delivering a 45' powerboat from Toronto to Chicago, my son and I got caught in thick fog
in Lake Erie, We were close to the Canadian shore and all our electronics
went down. After about 20hrs we were low on fuel
and one engine
went down. We were afraid to try and make port because of all the shallows along the shore so we DR'd to Pelee Island and found the break wall at the marina by feeling with a 16' boat pole. Fortunately we are in the habit of plotting a DR even with the electronics
so we had a place to start when they crapped out.
For fixes I use GPS
regularly. I scribble down the time and fix in a logbook, along with current
heading and speed and whatever other info. I then plot that on the paper with a pencil. Takes barely any time and like you said, at worst I have a few hour old electronic fix and can DR from there.