HMS Protector (A173): The Norwegian Icebreaker Now Guarding Britain's Polar Interests

Born a Polar Bear

HMS Protector did not begin her life as a Royal Navy ship at all. She was built as MV Polarbjorn, Norwegian for polar bear, a purpose-built icebreaking research vessel constructed for the Bergen-based GC Rieber Shipping, laid down in September 2000 and launched the following July, and spent her early years chartered out for polar research and subsea support work in some of the most demanding waters on Earth.

It was precisely that proven ice-capable pedigree that caught the Royal Navy's attention when it suddenly needed a replacement ship.

The design is in fact a scaled-up version of RRS Ernest Shackleton, a smaller half-sister vessel from the same Norwegian yard that the British Antarctic Survey had already been chartering since 1999, so the Navy was buying into a proven family rather than an unknown quantity. Fittingly for a ship named Protector, she is not actually allowed to carry weapons at all: Article 1 of the 1961 Antarctic Treaty bans military activity on the continent, so her armament amounts to precisely nothing.

An Emergency Replacement That Became Permanent

In April 2011, with the Navy's previous ice patrol ship HMS Endurance out of action following serious flooding damage, Polarbjorn was chartered as a stopgap replacement at a cost of £8.7 million a year.

What had happened to Endurance is worth knowing, because it is the reason any of this took place. She flooded catastrophically on 16 December 2008 in the Straits of Magellan, not through ice damage or heavy weather but while her engineers were cleaning a sea water strainer, with thirty-eight passengers aboard including parties from the British Antarctic Survey and a BBC film crew. She very nearly sank, and she never sailed operationally again. The whole business is set out in the article on HMS Endurance (A171). Britain went from having a polar ship to having none at all in an afternoon, and it took two and a half years to find a replacement.

The name that came back is older than Endurance. The first Antarctic patrol ship the Royal Navy ever had was also called Protector: a 2,900-ton net layer of 1938, converted at Devonport in 1955 with an ice-strengthened hull, a flight deck and a rather crude hangar bolted on, sent south as guardship and survey vessel for the Falklands and their dependencies, and only formally reclassified as an ice patrol ship in 1959. She paid off in 1968 and was replaced by the first Endurance. So the sequence runs Protector, Endurance, Endurance, Protector, and the name had been off the Navy List for forty-three years when a Norwegian icebreaker picked it up again in 2011.

A quick ten-day refit in Denmark relocated her helicopter deck from above the bridge to the stern and added a multibeam echosounder for hydrographic survey work, and she commissioned into the Royal Navy as HMS Protector on 23 June 2011, in a ceremony deliberately timed to fall on the fiftieth anniversary of the Antarctic Treaty coming into force.

The stopgap arrangement proved successful enough that the Ministry of Defence bought her outright in September 2013 for £51 million, turning what began as an emergency fix into the Navy's long-term solution for its polar mission.

Firefighting in Antarctica

Protector's work has rarely stayed purely scientific. In February 2012 she responded to a serious fire at Brazil's Comandante Ferraz research station in Antarctica, deploying 23 sailors and firefighting equipment to help an allied nation's scientists in truly difficult, remote conditions where outside help of any kind is desperately hard to come by.

That same season she delivered 170 cubic metres of aviation fuel to the British Antarctic Survey's Rothera station, the kind of unglamorous logistics work that keeps Britain's entire scientific presence in Antarctica functioning.

A year later she proved her worth again in a very different kind of emergency, coming to the rescue of the cruise ship Fram after she became trapped in ice floes in 2013, exactly the sort of search-and-rescue role that has only grown more relevant as Antarctic tourist cruising has increased.

Waters No Royal Navy Ship Had Sailed in Decades

Between 2015 and 2016, Protector undertook a twenty-month deployment that took her into the Ross Sea, marking the first time any Royal Navy or British government vessel had operated in the waters south of Australia and New Zealand since 1936, a particularly historic return to a part of the world Britain's polar ambitions had rather neglected for the best part of a century.

A Search That Ended in Tragedy

In November 2017, Protector was redeployed to join the international search for the missing Argentine submarine ARA San Juan, which had vanished with 44 crew aboard in the South Atlantic, joining the multinational effort on the 19th and using her own multi-beam echo sounders to help scan the seabed alongside research vessels from the United States, Chile and Brazil.

The submarine and her crew were not found alive, and the loss remains one of the more sobering reminders of just how unforgiving deep, cold southern waters can be; Protector's role in that search, alongside vessels from many nations, reflected the kind of genuine international cooperation that underpins so much of the work done in these remote regions, even when the outcome is not the one anyone hopes for. She later paid a goodwill visit to Buenos Aires, a small piece of bridge-building between two nations that still carry unresolved tension over the Falklands.

She was found. On 17 November 2018, a year and a day after she vanished, the search vessel Seabed Constructor, working for the American company Ocean Infinity on a no-find-no-fee contract, located San Juan in a ravine about six hundred kilometres east of Comodoro Rivadavia, at a depth of some nine hundred metres. The images settled what everybody had feared and nobody had been able to prove: the pressure hull had imploded, and the bow, the sail and the propellers lay scattered across eight thousand square metres of seabed. It would have taken a fraction of a second.

The Argentine navy's account traces it back to seawater getting in through the snorkel and short-circuiting a battery tray forward, which is the fault her captain had reported by radio before she was lost. The point for a ship like Protector is a simpler one. There is no submarine rescue capability that reaches nine hundred metres, and the only reason anybody knows where those forty-four men are is that a handful of ships with echo sounders spent a year looking. That is a great deal of what a polar patrol vessel with a survey suite is actually for.

Further North Than Any Royal Navy Ship Before Her

Protector's polar credentials are not limited to the south. During a series of Ice Ramming Trials that June, fresh off the most extensive overhaul of her career, a 2021 Arctic patrol took her to 80°41.5' North in the Greenland Sea, just 1,050 kilometres from the North Pole, the furthest north any Royal Navy surface ship has ever sailed; only the nuclear submarine HMS Trenchant, which surfaced through the ice at the Pole itself in 2018, has ever taken the Navy closer. It was a record that underlined just how capable a converted Norwegian research icebreaker turned out to be for a navy that had, for decades, made do with rather less specialised vessels for its polar work.

More recently, in January 2024, she hosted Professor Fay Couceiro of the University of Portsmouth aboard for a water-sampling mission around Pourquoi Pas Island, testing for microplastics, heavy metals and antimicrobial resistance genes as part of a wider study into the environmental impact of Antarctic tourism and climate change, preparing the samples in the ship's own wet lab as she went.

Still Working Both Ends of the Earth

Based at Devonport since 2014, HMS Protector remains in active service today, continuing her seasonal rhythm of Antarctic deployments through the southern summer, supporting British scientific research, surveying largely uncharted polar waters, and representing British interests in some of the most remote and least forgiving parts of the planet.

For a ship that started out simply chasing icebergs for a Norwegian research company, it has been a remarkable second career.

A Replacement in the Pipeline

In July 2026, defence minister Luke Pollard confirmed to Parliament that the Defence Investment Plan has allocated funding to replace Protector, though the exact timeline and procurement method are still being worked out, the first concrete step toward retiring a ship that began her Royal Navy career as an emergency stopgap purchase.

This is a live article which will be updated when more information is available.