There is language in the Senate Defense Authorization bill that makes me think this time around they must get a replacement; noffail mission. This boat is no longer C-130 transportable or air droppable at all. Much bigger boat. Looks to be inbetween the Mk5 and NSWRIB.
40 ft Max I'd say, if they want to plan for a prime mover along for the ride. Since Dets are usually 2 boats, one prime mover and a pallet that would require 2 C-130's. If the boat is much bigger, they will have to hire a third c-130 for the prime mover and associated goodies.