You listen very carefully to the flight attendant who's soft comforting voice while distributing drinks is now barking like a Sargeant Major on parade. The liferafts are fully equipped.If your on British Airways try to finger the civilian MOD4. Seriously, in the water you need to stay afloat,warm and visible. This means dressing well, knowing how to inflate your pants if a PFD isn't on you and carrying a mirror and a whistle. If your washed ashore just start gathering FED EX packages ;O)