I think it is only partly possible.
At least install the entire Wolves of Steel Mod which includes almost everything you need and get The Enigma Mod
which has you decoding your messages.
Star maps are there in the TWOS mod as are other things.
I now play at realtime. Trying not to use the time setting at all.
Makes it quite real though at times boring but that time I pass with dive tests and crew training.
I do have some beef with the sextant though. It does not work the way it is supposed to. True, I get corrected degree readings but my altitude measurement device is not working the way it should.
Also do the four bearing's tutorial, it is great !
(in the TWOS Mod). Just use your navigator's celestial fix as a check whether your calculations were right.
And watch these also. They help
Ashikaga