I know that emergency slides can be used as life rafts, as was the case with the A320 in the Hudson.
I was wondering if anyone would know how many of these slides are on a typical A330 or 767. Are they the only things used as life rafts, or are there other rafts available should a "water landing" occur? I was watching the Mayday episode on the Air Transat A330 that came close to doing a forced water ditching and I was trying to imagine how they'd leave that aircraft / float until helped arrived (assuming they would still be intact, like the US Airways). Are they enough for a full load of passengers?
Personal flotation devices will keep you afloat, but that won't do much good in the North Atlantic. Maybe to keep your frozen body from sinking. without a raft you'd probably die of hypothermia pretty quickly.