ROMEO Seahawk has no floatation equipment unlike the older B model in the RAN FAA (according to this message received):
"Yanks put avionics in the spaces we used to have floats, and we weren’t allowed to change it for our needs. So, no floats. The Danish did develop with Sikorsky a big arse float/raft that can be carried in a canister on a stores station. We were supposed to be getting that, however, I have no idea if that has even materialised. This might fast track that now. Based on my understanding, when’s Seahawk hits the water, and begins to sink, aircrew effectively only have a max 15secs to be out, or they’re pretty much dead. Yanks lose so many people in their Seahawk ditchings."