Welcome to SUBSIM
agentx250
There was a mod that would fit some of the stuff you want, but it was
wayyyy back with 1.2, the Killer Sub Mod:
http://www.subsim.com/radioroom/showthread.php?t=115333
The mod has not been updated since 1.2, but the thread and read-me may give you some ideas.
Also, as per what what mentioned here already, if your willing to invest the time, there are many great resources here in the threads\stickies that could get you well on your way to doing your own stuff with SH4. But it all takes time

, nothing happens overnight.
Good luck
Edit: here is another mod, compatible with 1.3 I think, although I saw that modder has something
possibly in the works for 1.5:
http://www.subsim.com/radioroom/show...ight=nuke+boat
RDP