Pushed by very strong overnight winds, the hulking ship drifted away from the dock at 2:53 a.m., presumably as many crew and passengers onboard attempted to sleep.
After Arcadia escaped her mooring, she floated sideways for a short time, before her crew jumped into action and brought her under control.
It is still unclear whether the vessel had been damaged, or if anyone onboard had been injured.
The ship is among the cruise ships to dock at the historic Bermuda Royal Naval Dockyard which is the most visited site found on the British island territory.
For other P&O Arcadia accidents and incidents see at the ship's CruiseMinus page.