[editor-surveyor]

.
How long can a C 130 float?

[Cvengr]

If they crashed while attempting to refuel, I doubt they were able to land. If one recovered, then it may have been the pilot of the aircraft being refueled.

[Sergio]

I wish I knew. Probably longer if the plane was able to make a controlled water landing, and the fuselage was intact, and the seas are not rough. Too many variables to say, hopefully long enough for the crew to get out safely.