I saw that map screenshot listing M, i installed my game in german version and play in german and the map lists kilometers which is a chore.
Does the english version list land miles or sea miles?
calculating knots to kilometers is unnecessary for a naval game i think.
Apart from that, i think the maps should really have the ports mapped to.
Never crashed on me so far, but i dont use the crew auto management.
I leave one crew spot empty in the Type II boat, made it easier for me to handle the crew, have the same amount in the back crew room than in the engine room but only 6 crewman and 4 maates needed.
If the crew is exhausted from a battle make sure to switch as soon as you have fully rested ones. Fully rested sitting in the bed will make you loose "overall resting capability".
Cruising to and from target at one third gives enogh fuel to rturn to base and spend some time at full ahead chasing contacts.
The merchants are using routes, once you know them in your area you can travel along those to find em.
I found a lot of traffic and no enemy destroyers at the begining between danmark and norway.
I travel back all the way to my harbor but im not sure if that gives extra points or not. I am sure the hit is not big, so before you run out of fuel after completing mission you can hit esc and return to home base, eaven if your nearly out of fuel, guess they sail home.
I use magnetic under keel but untill now always needed 2 for C2 cargo, smaller ones needed 1.
Best shot was a C Class destroyer from 3000m out, couldnt get closer without surfacing cause he was to fast for my dived speed of 7 knots. 2 Torps in 2 degree fan, one of em hit and sunk it.
