I'm not sure where you other guys are getting your information from. The A320 has a Ditching button that, when pushed, automatically puts out a "Mayday" pre-recorded by Stephen hawking, extends arm and leg clamps to prevent the pilots from touching anything, selects a suitable landing area and proceeds to approach the area. Threshold and touchdown markings are projected on the landing surface via a drop down translucent landing light cover. The aircraft is then flown to a gentle touchdown on the water.