It strikes me that assuming Nina is no more how come none of the electronics
were activated to SOS ? A knockdown or a huge rogue wave
would not of instantly killed everyone on board, neither was there any message to support she was in kind of distress
, so, the only scenario that I can come up with that she was run down by a much large vessel...or, less likely , she was far off course and stuck rock....Maybe the authorities should check to see if any vessel in the area at the time has reported hitting something?