HMS Endurance (A171): The Red Icebreaker That Nearly Sank Cleaning a Strainer

Built in Norway

HMS Endurance was built in Norway in 1990 by the Ulstein Hatlo shipyard for Rieber Shipping, originally entering service as the commercial icebreaker MV Polar Circle.

She was a capable Class 1 icebreaker, powered by two Bergen BRG8 diesel engines producing over 8,000 shaft horsepower and driving computer-controlled variable-pitch propellers, backed by both bow and stern thrusters, a combination that let her push through ice up to a metre thick at a steady 3 knots.

She carried two ice-modified Westland Lynx helicopters, essential tools for reconnaissance and logistics support in the vast, largely uncharted expanses of the Southern Ocean and Antarctic coastline she would spend her career patrolling.

The Royal Navy first chartered MV Polar Circle on 21 November 1991, renaming her HMS Polar Circle, before purchasing her outright on 9 October 1992 and renaming her HMS Endurance, taking the name of a previous ice patrol ship that had been damaged after striking an iceberg, a fittingly hardy replacement for a role that demanded genuine resilience against one of the planet's most unforgiving environments.

Britain's Red Icebreaker

HMS Endurance, painted in the distinctive red hull that made her instantly recognisable among Antarctic research vessels, spent her career providing what the Royal Navy termed sovereign presence in polar waters, conducting hydrographic surveys and supporting the British Antarctic Survey's scientific work across some of the most remote and difficult territory on Earth.

Her typical deployment pattern took her south into the Southern Ocean before returning north via tropical waters, and later shifted to an eighteen-month rotation designed to maximise the time she could actually spend supporting Antarctic research during the brief window each year when conditions allowed it.

HMS Endurance also carried out a series of notable diplomatic visits, including the first Royal Navy vessel to call at Argentina since the Falklands War, visiting Buenos Aires in 1997, with further return visits in 1998 and 2002, a properly significant thaw in relations given how central the two countries' naval history in the South Atlantic had been to the 1982 conflict.

She carried Queen Elizabeth II during the International Fleet Review of 2005, and in 2007 was offered to help resupply Argentina's own Antarctic research bases after the Argentine icebreaker ARA Almirante Irizar suffered damage, a particularly warm gesture of practical cooperation between two navies with a famously complicated shared history.

A Run of Bad Luck

HMS Endurance's later career was dogged by a persistent run of mechanical misfortune. In 2004, after a refit at Falmouth, the ship listed severely when her drydock experienced uncontrolled flooding, an incident that set off a string of machinery problems over the following years.

In January 2006, during Antarctic survey work, engineering staff discovered her rudder had come loose, forcing her to dock at Puerto Belgrano in Argentina for repairs in mid-March, work further delayed by around three weeks when a dockers' strike halted progress before the rudder could finally be replaced and welded back into position.

Nearly Lost Cleaning a Strainer

HMS Endurance's most serious incident came in December 2008, and it began, almost unbelievably, with routine maintenance. While crew were cleaning a sea-water strainer to improve the ship's fresh water production, air lines controlling a hull valve were incorrectly reconnected, causing the valve to open uncontrollably.

The resulting flood in the engine room left HMS Endurance entirely without power or propulsion, a catastrophic and rapidly worsening situation that came close to costing the ship entirely.

She was saved, in the end, largely by good fortune: the ship drifted into shallow water, allowing her anchors to hold position rather than letting her drift helplessly, and a Chilean tug was able to tow her to Punta Arenas for emergency assessment.

A subsequent Royal Navy inquiry found that the pipe installation involved had fallen below accepted engineering standards, creating an ambiguous reconnection setup that made the fatal error all too easy to make, a sobering lesson in how a routine task, handled by a system with poorly designed safeguards, could nearly sink a ship that had survived years of genuine Antarctic ice navigation without serious incident.

Laid Up and Scrapped

HMS Endurance never returned to active Antarctic service after the 2008 flooding. She was laid up at Portsmouth from 2009 to 2016, with repair estimates reaching around £30 million, a cost the Ministry of Defence ultimately judged not worth paying for a ship of her age and history of mechanical trouble.

Her scrapping was officially announced on 7 October 2013, and after further delay she was offered for sale in July 2015, finally departing Portsmouth under tow on 1 June 2016 bound for a ship recycling facility in Turkey, bringing to an end the career of a ship that had spent seventeen years as Britain's eyes, ears and flag in one of the most remote and demanding regions on the planet, brought down in the end not by the Antarctic ice she had been built to face, but by a maintenance accident in far calmer waters.