An accident report says three fishermen died when their vessel sank, because their incorrectly stowed life-raft failed to float free and automatically inflate.
The three men had set off from Weymouth on the wooden potting 'Purbeck Isle' vessel when it foundered nine miles off Portland Bill in May last year.
Had the liferaft floated free and inflated it was "entirely possible" that the fishing boat's skipper David McFarlane, 35, and his crewmen, Jack Craig, 21, and Robert Prowse, 20, would have been saved, the report said.
More top news
Expect more rain tonight along with strengthening winds. It will be showery tomorrow with bright breaks. Reaching 14 C but feeling colder
Plenty of rain tonight with strengthening winds. Showery tomorrow with temperatures reaching 13 C - feeling colder in the wind
A fox cub is recovering at a wildlife rescue centre in Somerset after being saved by the dog owner. She's getting round-the-clock care