The Royal Navy's largest ever warship, the HMS Queen Elizabeth, is due to set sail from the Rosyth dockyard in Fife for the first time today.
At 280m, the ship is longer than the Houses of Parliament (265m), and it weighs a mammoth 65,000 tonnes.
The aircraft carrier, which has taken eight years to build, will be able to operate with a crew of 1,000 and 40 aircraft once in full service.
Together with the HMS Prince of Wales, the Royal Navy's two new carriers will cost more than £6bn.
Aircraft Carrier Alliance infographic shows HMS Queen Elizabeth in a cutaway, providing details many might not have known about. pic.twitter.com/zVSqh2ilLI— UK Defence Journal (@UKDefJournal) June 23, 2017
Eleven tugs will manoeuvre the ship out of the dock and through a tight entrance into the estuary. From there, the HMS Queen Elizabeth will travel under the Forth bridges.
It will still be several years before the ship is fully operational after trials this summer.