Adds massive cargo ships to the game, that function similarly to trains. Also adds deep sea oil, oil platforms, tanker ships, train bridges and other water based content.
So how about adding a different type of port that ships can automatically head to when they are low on fuel? Similar to magu5026's "Automatic Train Fuel Stop" https://mods.factorio.com/mod/FuelTrainStop
That feature could be added to that mod, similar to how LTN makes LTN Ports when it sees Cargo Ships is installed. I do not think we will add it to the Cargo Ships mod.