Interesting. I bet this would be useful all over the world. I wonder if there's anything like this available anywhere else. The longer I think on it, the better it sounds.
The biggest hurdle would probably be organized crime. It might sound crazy, but most ports are infested with deeply rooted criminals who are involved with even the most mundane aspects of the import/export arena. Of course, even organized crime can be disrupted with the right tech.
Hard to find boat from pier to ship
Also cost prohibitive alot of unnecessary middle man