OK I was doing some research and here is a idea,I copy the main map into my second screen and use it for navigation, how about your guys do a editable map so people could plot were they going once you finish just click delete or save in a directory for future reference,also I noticed if you stop the game in the middle of the ocean and start 3 days later you will have a pain in the neck to remember were you are, so with the map you will be able to know were you stopped.
Check pics please.
I add 2 very old maps and you can see they have the coordinates on it so why we can't have in the game map, the star in the map is N,S,E,W and I also find some map with have more the one star for ezy navigation.