Thanks, this was just what I had at the time. I plan to keep working on it!

I like it, but definitely a few things should be changed:

()The sub should be at least 2 blocks wider on both sides to fit more of an interior
()The "Flood Tube" key should mention that it opens the tube doors
()The gun be downgraded to a LAC or HAC because Battle Cannon rounds are heavy and take up space
()Maybe downgrade the class to a "Coastal Submarine", especially with the smaller size of the sub
()And just a note: Sonar-guided torpedoes are not in the project as of now,

But keep up the good work!