Two divers were rescued by a Portland Coastguard helicopter after being swept out to sea by a rip tide.
The divers were taking part in a drift dive near Grove Point in Portland when their dive boat lost sight of them at 11:40 GMT.
The coastguard was called at midday and local boats joined two lifeboats and a helicopter in the search.
Both divers were found by the helicopter past Portland Bill and were flown back to the helicopter base.
Neither was harmed.
Coastguard Nic Lonsdale said: "If we hadn't spotted them, they could have been in trouble.
"It's hard to see divers once they get out to sea."