A new submarine to go into a naval base. Found under Decor/Misc Decor and costs 0.
Please see my older post of the Naval Base on the 3rd of September to give you an idea how to install it.
The submarine is installed from the front of the pier, contrary to the Aircraft carrier which came from the side of the long pier. You have to rotate it 180 degrees. It has 1 colour channel, so colour it to your own liking. I used a geometric pattern on this occasion.
Submarine A4 Stealth Class Carrie-C F21 (MediaFire)
Naval base and Nuclear aircraft carrier Fairview CN14