Below are some great PT Boat links. These were
verified as active in mid-February 2016.
Haze Gray
Listings of PT Boats by hull number (i.e PT-109).
The Library Of Congress PT Boats by hull number divided
up by classes and builders. Basic information on the
boats.
PT
Boat World Good site with information on the PT Boats as
well as photos and model builds.
...and there are many more great sites, too many to list
here by maintaining the active ones and deleting the ones
that have dropped off the net. Use your search engine
for general or specific searches.