Known as MASSEVEX, it allowed the three nations to practice the life-saving procedures that would be needed to help evacuate stricken submariners from a vessel disabled on the seabed.
Observers from the United States of America and Sweden were also invited to attend the test.
Commander Chris Baldwin RN, Rescue Element Commander and Operations Officer for the NATO Submarine Rescue System, said: “It is vitally important to bring the tri-national team together to conduct a dedicated period of capability training so that our submariners and their families can have confidence that if called upon, their colleagues in the NSRS are ready to come to their aid.
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“We have completed a very successful period of ‘mission rehearsal’ to ensure that the NSRS trained personnel from France, Norway, and the UK can operate effectively together in conducting submarine rescue operations.
“The completion of this MASSEVEX helps to keep the NSRS team ready to respond to any submarine emergency globally.”
The exercise was held at the NATO Submarine Rescue System base at the Westway industrial site, near Glasgow Airport.
The facility houses the 350-tonne, high-tech, air mobile, system that is capable of being deployed anywhere in the world.
Commander Nick Samuels RN, Coordinator Rescue Forces (CRF) during the MASSEVEX, said: “The NSRS is one of the leading submarine rescue capabilities in the world and is held at immediate readiness to respond to a submarine emergency.
“Activated by the Royal Navy’s Maritime Operations Centre in Northwood, NSRS will be a prime asset for the Coordinator Rescue Forces (CRF) to direct as part of what would probably be a global effort to save lives. The CRF’s role is to coordinate the rescue effort to ensure the best use of the assets assigned to the rescue task group.”