The call that came through was a "PAN-PAN", which means that a vessel is in urgent distress, but no one's life is in immediate danger.
"It's not a mayday, but it's a step down from a mayday.
"One of the concerns at the time was that there was a vessel that was going to be going through there, a big container ship."
He said the coastguard had to tow the vessel out of the passage so the ship could pass, and then return the ship to the passage to right the boat.
He said the vessel was towed to the shore.
At this time he didn't know what had caused the vessel to flip. He also couldn't confirm officially that no one was hurt.
"I haven't had that information come through, but as far as I understand no one was hurt...I haven't had it confirmed.