This reply is to Dick:
I can’t reply to you via email, but only on this website. But you seem to have got here OK, as you’ve replied to me here!
Here’s a shortcut to this same page: https://tinyurl.com/N4uticat
You seem to be perfectly well prepared, so I don’t think I can add anything except PAPER CHARTS in case your electrics go down! (And keep transferring your position to your paper charts, so that you know exactly where you are if the electrics go!)