The first sailors have joined Royal Navy ship HMS Glasgow.
The City-class vessel is designed to become one of the world's most advanced submarine hunters.
She is the first of eight Type 26 frigates which will be responsible for protecting the UK’s nuclear deterrence and aircraft carrier strike groups from hostile submarines.
Teams of engineers, shipwrights and technicians are putting the final touches on Glasgow's hull and superstructure, at Govan's BAE Systems yard.
Sir Simon Lister, Managing Director of BAE Systems' Naval Ships business, presented the ship's first two junior ratings – Leading Writer Hayden Palmer and logistician Leading Hand Samuela Halofaki – with the inaugural HMS Glasgow cap tallies.
Commander Phil Burgess, the ship's Marine Engineer Officer and Senior Naval Officer, said: "The ship's company is the life-blood of a warship.
"With Royal Navy personnel joining HMS Glasgow for the first time, we have reached a key milestone that will enable the engineering, administrative and organisational foundations to be established.
"These are necessary for a modern-day warship to function efficiently and effectively, and by starting now we can best support the build and transition into service of HMS Glasgow."
The sailors will help to create the ship's 'operators' manual – routines, systems and sensors to ensure she's in top condition when she enters service later this decade.
The Navy says they are also tasked with giving HMS Glasgow her 'soul' – setting the tone for active service and building bonds with sponsors, affiliate units, charities and community groups.
HMS Glasgow is the first of an initial batch of three vessels all named after UK cities, to be followed by HMS Cardiff and Belfast, and will enter service this decade.
The Royal Navy said the Type 26 frigates are to be equipped with bow and towed-array sonars, and will carry a Wildcat or Merlin helicopter for submarine-hunting missions.
The ships are also to be fitted with a five-inch gun and vertical-launch missile silo, as well as an adaptable mission bay.