Redarding ditchings, there have been several ditchings made by large under wing jets, 707 landed on lake victoria (or a lake in Africa) all the crew survuived, Nimrod ditched into the north sea after an engine fire, all survived and the plant took ages to sink, and the numerous over runs by jets ending up in the water. Have a hunt around on airdisaster.com and im sure you'll find a lot more. One more ditching not by a jet but still large was a Boeing Statsicrusier that ditched in the pacific, all on board again survived, there's a book about it ill try find the photos of and post a link.