Ghost ship: Nobody on board

A yacht was found in pretty good condition floating off the Australian coast. Rescuers found a ship floating silently 80 nautical miles off the northeast coast. Refer the CNN story.
The yacht seemed in pretty fine condition, the only problem being that one sail was in a shredded condition. Other than that, the engine of the yacht was running, food was on the table, a laptop was turned on, but of the crew members there was no sign.
A proper mystery as to what happened to the 3 crew members. The yacht had passed through an area where weather and sea conditions were rough, but they actually don't have any more clues. Rescuers are looking at the yacht's GPS records to figure out the past route of the yacht to see whether they can get any clues.