I will have to add some notes to the 'Changing Port' section: I don't say that there are *limitations* of course when chosing to change your port. I'm currently replaying to see what's possible and what not.
Let's hope for the best.
As a quick provisory guide: you can only change to such ports:
- The port must have a bunker compound (you can see that when you zoom in); else you cannot start or end the patrol at it, only refit;
- The port must be allied at the time you want to start from it, and at the time you visit the officer's map (this can change quickly and may not be visible at the officer's map in the bunker, but it can be overcome easily by changing date and re-docking).
- Your Flotilla is linked to specific ports only, not sure, which would mean only ports defined in the chapter timeline are allowed anyway wihtout complex additional editing (let's see what I find out and hope...)