Gary Alfred Charlton, 59, was last seen on a bulk laker on Lake Ontario in the early hours of October 20, 2010. The ship was near Cobourg, Ontario, and crew members reported last seeing him at about 4:10 a.m. His absence was not noticed until he failed to report for his noon shift, after which the crew conducted a thorough search of the vessel and the captain contacted police.

The Ontario Provincial Police were notified at the Iroquois Locks in Iroquois, Ontario, and investigators from the Stormont Dundas and Glengarry OPP joined the search of the moving ship but found no sign of Charlton. He is described as a Caucasian male, 67 inches tall, 165 pounds, slender, with brown hair and hazel eyes, and believed to have been wearing orange overalls.

Charlton vanished from a contained, underway vessel and no definitive evidence or subsequent sightings have been reported, leaving the disappearance unresolved. If anyone was aboard that laker or saw activity near Cobourg around October 20, 2010, please come forward with information.