I would love to see this happen as well. I had already started a thread "
[REQ] Navigation Map Make-Over" asking for more detailed Nav Charts (I said "charts" Kylania
). Current NAV Charts are difficult to determind Water Depth as water depth gradient is very poor.
Changing the Navigational Charts to Kriegsmarine Grid style is only half of what would need to be done.
You may also need to edit the Radio Messages to replect the grid changes as well.
Any MOD that works with Radio Contact Messages may also need to be changed.