Fuji
You make your point well but this is exactly why an accurate position fix at a late stage just before the ditching is so vital ...... It gives you time to get the aircraft prepared to ditch and gets the most accurate fix broadcast to a large number of people, range and bearing from a known local VOR is most likely to be the easiest format to broadcast and the least likely to be misunderstood after all DVR 090/15 is a lot less writing than the LAT / LONG and a lot quicker to get into the FMC or GPS of any aircraft coming to your assistance.