Real Navigation in Silent Hunter 5 is one of my favorites mods of the many I use, and involves the use of speed / distance charts to plot your current postion from a celestial fix, which you can take yourself with a sextant . I Would love to see somthing like that in OW , or maybe just your navigator giving you a celestial fix every 4 hours or on request. But I found that im able to get around with out any problems using the Community Map, though we do need a map in game.