Britain's biggest warship has already broken down just one day into its voyage to the US.
The Royal Navy aircraft carrier HMS Prince of Wales left from Portsmouth Naval Base, Hampshire, on Saturday but soon afterwards encountered a "emerging mechanical issue" off the south coast.
Weighing a staggering 65,000 tonnes and costing £3billion, the warship had planned to set sail across the Atlantic for training exercises with the US Navy alongside the Royal Canadian Navy and United States Marine Corps.