The author of that topic / thread stated he thought that the ships used as a launch platform against cities and towns akin to a poor man's Tomahawk. As in couple of dozen of hundred or so MAVs / RC a/c lifting off and causing havoc and damage to people and property.
Speedboats can be sunk by GPMG or cannon fire from a helo, if caught
as seen during Operation Prime Chance / Praying Mantis by certain units in North Carolina and Kentucky
and by the Flying Leathernecks finest.
Cheers