David Trotter and a tight-knit crew of explorers have spent decades looking for lost vessels.

The Carruthers was the last of eight vessels that sank in a 1913 storm that was still missing.

LAKE HURON — On a sunny, summer Sunday morning, perfect for being on the water, David Trotter, skippered his 32-foot boat, the Obsession Too, to a nearly 112-year-old shipwreck only a handful of people knew was there.

Along the way, the 84-year-old, who wore an indigo captain’s cap, eyed monitors that showed him, among other things, what was hidden deep below the surface. When he reached just the right spot, he cut the engine.

The boat gently bobbed above where the divers soon would be swimming.

Trotter and a tight-knit crew of amateur explorers have spent decades on their days off looking for old v

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