Hi folks, as told in one of my comments, a simple tutorial in building boats (Vanilla)

1. Start with building a simple bottom.
https://image.ibb.co/inxxFy/20180530104831_1.jpg

2. Add vertical wing panels to prevent turning
https://image.ibb.co/eXjzTJ/20180530105005_1.jpg

3. Add a frame arround it to make it more stable, and add Propellers in all directions so that you make sure you can accelerate.
Pic1:
https://image.ibb.co/kjKcFy/20180530111254_1.jpg
Pic2:
https://image.ibb.co/g0BPvy/20180531222959_1.jpg

4. Now that your function is finished, add cannons and decoration. https://image.ibb.co/hp9Nhd/20180531222406_1.jpg

5. You are finished! Now you can start war.
https://image.ibb.co/mycm8J/20180531222423_1.jpg

If the ship gets too heavy, just copy the tornado.

When the ship's been turning all the time, try to add more vertical wings to the front and the back.

Thats it. If you have questions, ask them!