Original: The Kaz II , dubbed '' the ghost yacht '' , is a 9.8-meter catamaran which was found drifting 88 nautical miles ( 160 km ) off of the northern coast of Australia on April 18 , 2007 .
Simplified: The Kaz II is a 12 metre catamaran that was found drifting 160 km ( 80 nautical miles ) off the northern coast of Australia on April 18 , 2007 .