We were playing around in another thread with methods for hiding your u-boat's location on the nav map and navigating without using the waypoint tool (see here, if it still works:
http://www.subsim.com/radioroom/showthread.php?t=93937
This sounds like a pretty cool addition to that whole concept of trying to do "real world" navigation - however, even assuming that something like this could eventually allow us to establish our boat's long. and lat., if the nav map isn't marked out with lat. and long. lines, how would that info help us locate our boat on the nav map? Can the nav map be modded to show lat. and long. lines?