Look at his neck, but it was not inflated. I think he was struggeling with undonning his winchgear, fins and the rest of the winchcable
I can see what might be the straps of his winching harness but not anything that looks much like an uninflated lifejacket but I stand to be corrected.
He seems to be struggling with the casualty hanging desperately on to him and trying to drown him.