HMS Prince of Wales has been floated and moved to her fitting-out berth at Rosyth.
In a delicate overnight operation, sluices were opened and water gradually filled the dry dock, specially enlarged for the 65,000-tonne warship and her older sister HMS Queen Elizabeth.
The aircraft carrier then moved from the dock, her home for the past three years, to the neighbouring basin and J and K berths, where her sister was fitted out before departing on sea trials during the summer.
Watch this amazing video by the Royal Navy showing the operation:
Minister for Defence Procurement Harriett Baldwin said: "This is an important moment in the monumental programme to build these two magnificent ships. I would like to thank the 10,000 people from across the UK who have helped us make such progress during 2017 on both HMS Queen Elizabeth and HMS Prince of Wales."
Crew and engineers from the Aircraft Carrier Alliance monitored the process throughout, while a flotilla of tugs moved the leviathan the short distance to her new berth.
Captain Ian Groom, the carrier’s Senior Naval Officer, said that the effort made by teams from industry, the Ministry of Defence and the ship’s company to reach this milestone had been “immense”.
Prince of Wales is 3,000 tonnes heavier than her sister was at the same stage – as the second ship in the class, construction and fitting out has moved more swiftly thanks to the lessons learned building HMS Queen Elizabeth.
Originally planned for 2018, the ‘undocking’ of the carrier took place ahead of schedule and just three months after the carrier was officially named by HRH the Duchess of Rothesay, as the Duchess of Cornwall is titled in Scotland.
The next milestone in the ship’s life will be the first running up of the generators and gas turbines, bringing the ship to life, which are earmarked for middle of 2018, followed by sea trials in 2019.