Here is a great story from
Plane Talking.
"
The diversion of two scheduled jets on flights to Sydney yesterday to pinpoint a missing yacht was not only unusual, and successful, but quite remarkable in the case of one of them, an Air Canada Boeing 777-200LR which had already been in the air for around 14 hours on a trip that normally takes 15 hours 30 minutes from Vancouver."
Some more technical details (and comments) at the
Aviation Herald.