Unique game locations-ferry

I am now on a huge 5 story ferry, roughly the size of a large UT map, and wondering why there haven’t been many ferry or ferry terminal themed games (or maps).
Like any good map, it has clearly defined routes and boundaries, lots of z axis opportunities, and blocky ugly textures.
It should be perfect, right? You might remember the maps based on schools craze? Well, I guess that that is no longer politically correct. Your opinions? Mel B Digital