On drills though, I read the leaflet on Civair on ditching and life raft. It would seem the approved drill is exit aircraft, enter water and hold on to the escape slide. When you, and 40 others are all holding on, raft released and off you float singing Underneath the Chestnut Tree as one by one you succumb to hypothermia.
No dinghies and no canopy so a realistic assumption that no one would survive a ditching and if you did you probably wouldn't survive too be rescued.
http://travel.stackexchange.com/ques...afts-on-planes