Yacht in the Sea without a Crew

Off of the Australian coast, a yacht has been found with a computer running and the table set up for a meal...but no people.

The boat is in fine condition, but the three-person crew is missing. The GPS system has been retrieved in order to analyze any possibilities of the crew's whereabouts. However, one sail is badly shredded and the weather earlier this week had not been too good.

With forensic examination, hopefully the lost crew will be found. The pirate stories of the past aren't true on the Australian coast anymore... but how do you explain these three disappearances on a yacht?

Source: [Link]