Hi,
That image could almost be a section of fuz and wing-roots...with chutes/rafts deployed. It begs the question; What are the sea temps, wind-chill there..? Any maritime survival experts here like to offer chances for survivors..?
If that image is what you says ... this must be a beacon activated ....
Anyways if this was survivors in this zone ... not in raft or any floating object with some protection .. after so long time and with the average temperature .. my best guess is no survival possible