One of the exercises in the sport of Schutzhund involves being able to send your dog to search 6 blinds on the field. The helper or decoy is always in the 6th blind. By the time the dog reaches Sch2 and Sch3, it knows exactly where the decoy is when it enters the field. Every dog wants to go directly to the 6th blind and the blind search is an exercise in control of the dog. In this short video, Michael Ellis will talk about how he trains the blind search in Schutzhund.
I have used video of Tom Brollini from Alaska and his dog, Tygar, doing the blind search in the 2002 National Sch USA competition as an example in this streaming video.