Adds massive cargo ships to the game, that function similarly to trains. Also adds tanker ships, train bridges. NOTE: In 2.1, You Must Install Oil Rigs Separately!
The small boat is wayyy to slow to be useful as transportation. I would much rather travel via landfill or the hovercraft mod. I would suggest tripling the speed when not being used as a train.
i might consider increasing the speed a little, definitely not tripling it. The boat is already pretty fast in comparison to real world boats. In the end this whole mod boils down to aesthetics - just using landfill and trains in most cases is probably a lot faster and easier than creating a separate, slow network of ships.
And as you mentioned, there are options like the hovercraft.