I have the mod in an archive on my modding computer, so since you mentioned the first & last missions having the issue, that information pointed me toward the possibility of the dates not matching. I come by that knowledge having made all sorts of mission files for testing and other purposes, as well as campaign files, and you might be surprised how an incorrect date can skew the results of what you are doing...
- at the same time, a person does have to be careful with their mod activation order, and whether or not a given mod is compatible with the previous. This is part of the problem of trying to troubleshoot someone else's troubles, in that we aren't sitting at your computer and seeing what you have previously attempted. In your case, I am almost certain that Nisgeis intended the Submarine School missions for use with his modded radar and tdc, but if they work in your set-up, you should be fine. In FotRSU, the radar on the player's sub does not function, and my guess is that there is a slight incompatibility between a ship and FotRSU. But I can shoot on the sonar bearings, hit the ships, and they sink - so long as the torpedoes detonate...
- but I cannot do "radar training" with the mission files in FotRSU, without further editing...
