I was curious if you would be okay with adding the fix for issue https://mods.factorio.com/mod/cargo-ships/discussion/64e2980d545cc4a0fe0449ae
Testing it on my own it seems to work as simply as they say.

Yes, absolutely. I'll try to get that in some time this week, if not today.

0.2.7 fixes this. I confirmed that ports are placeable next to waterways. They're also still placeable next to tracks, but I don't have time this week to debug it. If you find a solution, I'd be happy to add it.

I'll try to take a look, I forget if I tested for placing them on land when I tried to fix it.

Edit: Looks like the same change I had done but written with proper lua knowledge so I have nothing to suggest.