A series of builder's sea trials subsequently commenced and, in June 2018, the ship left South Korea for delivery to the United Kingdom via San Diego and the Panama Canal.

[12] In March, whilst conducting aviation training off the Devon and Dorset coast, Tideforce responded to an emergency call from a Dutch-flagged ship and provided assistance to an injured sailor.

[16] In July 2023, Tideforce conducted replenishment-at-sea exercises with MV Raleigh Fisher, a merchant navy vessel on contract to the MoD.

[17] In September 2023, Tideforce was tasked to escort HMS Queen Elizabeth during her "Operation FIREDRAKE" deployment in northern European waters.

Yantar has likely been primarily engaged in information gathering, charting the location and vulnerabilities of cables and other undersea energy infrastructure should they wish to interfere with them in the future.