The map to the left shows locations where I've found T-boats around the world, 15 fairly confident matches, 1 maybe and then Point Nemo in the South Pacific, one of the spots I want to visit when this trip finally gets underway. I started finding these boats based on a dated list here http://www.tboatsusa.com/mainpages/database.html and then combing the area in Google Earth. If you'd like you can download the .KMZ here T-Boat KMZ to use in other maps.
Links to T-boaters I've found
T-504 Mi T Mo Facebook page
T-493 Thunderbird Instagram
T-444 Little Bear and T-438 Cub employed by Cal Maritime as training vessels
T-480 Propeller used for education through Sea Scouts Instagram