I finally found out who is who of the three boats with the tracking devices:

Marley's Bayside Grille 1 -- Jared Sonnenklar/Mike Siao.
They are designated as "orange" for the tracking, but apparently their tracking device is not working.

Marley's Bayside Grille 2 -- Steve Lohmayer/Jay Sonnenklar.
They are designated as "yellow" for the tracking.

Marley's Bayside Grille 3 -- Dennis Green/Jason Childers.
They are designated as "white" for the tracking.

Report from Warren Green is that Marley's white capsized twice between the start and Card Sound Bridge, so they are back a ways.

Marley's Yellow was first under Card Sound, and Marley's Orange was third under the bridge, so too bad orange's tracking device is not working. They will check it out when they get to Hollywood.

I have been told that Kenny and Jamie have a tracking device on their boat, too, but I don't know where to see it. I'll try to find out. If somebody knows, post it here.