Essenza;
Sub Command is one of the three games in the "holy trinity" from Sonalysts (Fleet Command, 688i H/K, SC, and DW)* and you'll find the rest of us in the "Janes Forum". :emoji goes here:**
https://www.subsim.com/radioroom/forumdisplay.php?f=181
You can find a mod for SC here in the Downloads section but check out the forum first, SCX is very comprehensive and it might not be the first mod you want to check out.
Anyway, welcome aboard.
*- I include F/C because it was developed and coded by Sonalysts but it didn't have the same appeal and could be a bit of a bear to run, at best. For the most part, all of these games feel familiar and really only differ by the year they were released with better game options.
**- Uh, Neal??