The Royal Navy's flagship aircraft carrier is to sail up the Clyde near Glasgow tomorrow (March 14).
HMS Queen Elizabeth is on its way from Portsmouth to Glen Mallen on the Clyde for a routine logistics visit, according to The Royal Navy.
Reports suggest it has passed Arran in the past few hours.
The visit comes ahead of returning to sea to carry out vital training and exercises to keep her ready for operations, reports the UK Defence Journal.
Captain Ian Feasey Royal Navy, Commanding Officer of the £3billion ship, which took eight years to build, said on Thursday (March 10): “We return to sea today as the United Kingdom’s Very High Readiness Strike Carrier for routine operational activity and training.
"The hard work of both my ship’s company and our supporting industrial partners has improved the condition of the Fleet Flagship.”
A spokesperson for the Royal Navy added: "During this short stint at sea, training will focus on individual, team and whole ship exercises as well as working with commando-carrying Merlin helicopters from RNAS Yeovilton-based 846 Naval Air Squadron.
"The ship will be conducting further exercises and training later in the year as the carrier is kept at very high readiness to deploy anywhere in the world at a moment’s notice.”
The Royal Navy also confirmed the HMS Prince of Wales has also recently left Portsmouth for the Arctic to join a NATO task force for a large-scale Norwegian-led exercise, which will see 35,000 troops from 28 nations operate together in one of the "harshest environments known to man".