Instructions from the site:
"You will be presented with 5 images. The task is to indicate any satellite images which contain any foreign objects in the water that may resemble Jim's sailboat or parts of a boat. Jim's sailboat will show up as a regular object with sharp edges, white or nearly white, about 10 pixels long and 4 pixels wide in the image.
Marked images will be sent to a team of specialists who will determine if they contain information on the whereabouts of Jim Gray."
Let's help our comrade who may be in grave danger!"