Originally Posted by
pasoundman
When was the last landing on water (of a commercial passenger flight) where that could have been done ?
There has never been a landing of a commercial jet with under wing engines on open water in a way where the safety briefing had any relevance whatsoever. The closest in the sense that anyone survived was the Ethiopian jet of which there are videos around. But that cartwheeled, broke up and sank pretty much instantly so the safety briefing was irrelevant (except the part about don't inflate your lifejacket inside the aircraft, which did for a few people who might otherwise have escaped apparently, so it's quite possible that life jackets killed more people than they saved in that case).
Any sensible cost benefit analysis would remove life jackets from commercial jets - the huge environmental cost of the extra fuel needed to carry millions of them around the sky each day is way out of proportion to an infinitessimally small theoretical benefit. They are there as a hangover from the flying boat days when they did have a justifiable purpose.