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The Royal Navy’s lead hunter‑killer submarine, HMS Astute, has closed the books on a record‑breaking first commission and berth in Devonport for a multi‑year, multimillion‑pound mid‑life overhaul.
Commissioned in 2010, the 7,400‑tonne nuclear‑powered attack boat (SSN) has spent 15 straight years on global duties – the longest unbroken first commission in Royal Navy history.
During that time, HMS Astute chalked up an impressive list of “firsts” for the class: the first A‑boat through the Suez Canal, the first to conduct extensive weapons and sonar trials in the United States and in 2021, the first British SSN to visit Australia while escorting HMS Queen Elizabeth on its Indo‑Pacific carrier strike tour.
The visit underscored Britain’s commitment to the AUKUS partnership with Washington and Canberra and gave Australian officials their first close look at the technology that will inform the future SSN‑AUKUS design for the RAN.
Less visible, but no less important, has been HMS Astute’s quiet role patrolling UK and allied waters, gathering intelligence and deterring hostile submarines – missions rarely publicised under the Royal Navy’s “silent service” ethos.
Before handing the boat over to Babcock for her mid‑life revalidation period (MLRP), Commander Christopher Bate and his crew hosted family members, friends and VIPs for a final day at sea out of Plymouth, diving for several hours to give guests a taste of submarine life – complete with the mess‑deck favourite “cheesy wham‑bam” (cheese on toast, grilled ham and a fried egg).
“It was a small thank you for the support and sacrifices our loved ones have made while Astute has been away on operations,” Cdr Bate said.
The MLRP will see HMS Astute dry‑docked at Devonport’s state‑of‑the‑art submarine facilities, where it will receive new reactor components, updated combat systems, improved habitability and an all‑round structural tidy up to keep her lethal and seaworthy into the mid‑2030s.
While the Astute Class fleet is based at HM Naval Base Clyde in Scotland, major deep‑maintenance work is concentrated in Devonport – the same yard that handles the Vanguard Class ballistic missile submarines at the heart of Britain’s nuclear deterrent.
Five Astute Class boats are currently in service, with HMS Agamemnon due to commission later this year and HMS Achilles in advanced build at Barrow‑in‑Furness. Lessons gleaned from HMS Astute’s refit will feed directly into upkeep plans for the other submarines and via AUKUS into Australia’s own SSN program as the nation prepares to operate nuclear submarines for the first time.
For HMS Astute, the hard part of its career is far from over. Once the extensive mid‑life upgrade is complete, it will return to the fleet better equipped to stalk adversary submarines, launch Tomahawk cruise missiles and safeguard sea lanes – missions that, increasingly, will involve joint operations with future Australian and US nuclear boats in the Indo‑Pacific.
