I moved this to the Web Data Connector area of the forums. I have not heard of anyone connecting to this data source although I have personally looked up information on this site a few times ( I like to look up the super yachts that pass in front of our office).
If you come across an accessible data source, please let us know. My guess is that this data is available via the coast guard under the FOIA request they have outlined here: U.S. Coast Guard Navigation Center but it would have to be the 96 hour data. It mentions CSV and KML output request files.