From what I see, those are the set speeds for the boat, as found in the sim file:
If you get
Silent 3Ditor (S3D), you can fix it yourself. The release thread is
[REL] S3D - Silent 3ditor, and skwasjer's signature has a couple of valid links in it for some tutorials, but most of the ones not on SubSim are no longer available. It is easy enough to use though. Give a shout if you can't figure it out, but all you have to do is select the field to change, and then edit it in the little box at the bottom. 15-18 on the surface, and 22-25 submerged would be closer than what that has... lol
There is some "trash" in the mod folder also, so back the mod off while you do your sim file edits, and then you can clean-up a bit. In the Data / Submarine / NSS_Seawolf folder, you can move the file "USA_Arleigh_Burke.dat" out, as well as the "3D" folder in there with the sub files. Those are not needed by the mod, but are loaded by the game anyway, since they are there and take up extra space in the game's memory area. It does look like the mod might call for parts in the Data / Library folder, so keep that.
btw, in the MODS folder for your game, make certain that there is a "root" folder for the mod's "Data" folder, such as "SSN_Seawolf / Data" or some such. I used 7z to extract the archive, and it does not put the "Data" folder into a mod folder. If you use the Windows extraction tool, it will usually do that.
PS: You can sure sow some seeds of destruction with them ADCAPs... lol 67k+ sunk, including an entire large convoy, and a total of six warships (mostly escorts, one CL) in a 2 day cruise off of Kii Suido. One has to be careful, or they might "upgrade" a person to a Gato or something...
