How would they know that without a body? Survivors only got listed when they personally supplied their names to a designated rescuer personnel. Re the twins, someone gave the personnel her nickname, which wouldn't be the name on the staff register, so how did they get to be listed as survivors, together with Piht, when that didn't happen with any other survivor (i.e., an error)? Plus, remember Ken who rescued seven -as reported in early Swedish papers - which then was tallied down to one, and he got the highest military medal for it..? Could that six or seven be the 'missing crew'...?