Help ID this utility boat.

[bigcrunch]

Last year I was driving back from Arizona I came up behind what looked like a former Navy utility\work boat (gray) being towed by a sprinter van. I'd say approx. 20' long 8'6" ish beam. It had 2 huge propellers under it probably 2' dia each. Console almost aft. Looked like engines mid ship, hard covers all the way across. I wish I had taken pic but one I was tired from driving to AZ day before, two I was amazed a single rear wheel Sprinter could pull that boat and pretty well up hills, plus he had a Georgia tag long way for him\her also.

Any idea what model boat it could have been? I have Google'd every combo could think of. Been wondering since I saw it.

thanks,,,,,

 

[just me]

Border patrol boat?

 

[bigcrunch]

More like a work boat, huge props for the size boat almost tug like.