Royal Navy’s Only Ice Patrol Ship Faces Uncertain Future After Defect

The Royal Navy’s only dedicated ice patrol ship has been towed from Teesside to Devonport following a reported defect, raising questions about Britain’s ability to maintain its maritime presence in the polar regions as the government works toward a replacement.

HMS Protector was towed to Plymouth by commercial tugs, with Serco Marine Services tugs taking over the tow near the port, according to industry sources.

The Royal Navy has said the ship returned to its home port while investigations into a defect take place. The nature of the problem, the extent of any damage and the prospects for repairs have not been publicly established. British media reported the vessel suffered “a double engine defect.”

Former Royal Navy officers have raised concerns about the condition of the vessel’s main engines, while speculation has emerged over whether the problem could be related to recent maintenance. Neither the cause nor any potential maintenance error has been established officially.

Originally built in Norway in 2001 as the commercial research and subsea support vessel MV Polarbjørn, Protector was chartered by the Royal Navy in 2011 as a temporary replacement for HMS Endurance. Britain purchased the vessel outright in 2013 for 51 million pounds ($68 million).

Protector underwent a major refit in 2019-2020 after suffering a propulsion defect in the Caribbean. Further maintenance work took place in 2025, followed by additional work at a shipyard on Teesside.

The vessel typically deploys to the South Atlantic during the Antarctic ice season, conducting hydrographic surveys, supporting research stations and assisting the British Antarctic Survey. It also carries out inspections under the Antarctic Treaty and fisheries patrols in the Southern Ocean.

Its prolonged unavailability, or a decision to retire it early, could leave the Royal Navy without its dedicated ice patrol vessel at a time when Britain is seeking to maintain a presence in both the Arctic and Antarctic.

The situation raises comparisons with HMS Endurance, which suffered major flooding in the Strait of Magellan in December 2008. The ship lost propulsion after an engine compartment flooded and never returned to service. The Ministry of Defence subsequently abandoned plans to restore it, and the vessel was scrapped in Turkey in 2016.

The loss left the Royal Navy without an ice patrol ship for several Antarctic seasons. Protector was initially acquired as an interim measure but has remained in service for more than a decade.

The British Antarctic Survey operates its own research and logistics vessel, RRS Sir David Attenborough, which can continue supporting scientific operations and resupplying research stations. It does not, however, directly replace Protector’s naval patrol, hydrographic survey and government inspection functions.

The uncertainty comes as the Ministry of Defence prepares to replace Protector with a more modern vessel intended to support operations in the Arctic as well as around the British Antarctic Territory. In a parliamentary answer on September 15, Defence Readiness Minister Luke Pollard said decisions on the procurement method and replacement timeline would be taken in due course.

The engineering challenges facing aging icebreakers are not limited to Britain. The U.S. Coast Guard’s USCGC Healy suffered a propulsion motor fire in 2020 that required replacement of the damaged motor and forced the cancellation of its Arctic deployment. The vessel also suffered an onboard fire cutting its 2024 patrol short.

Healy suffered another major engineering casualty during post-refit sea trials in July, when it was towed back to Seattle. A source familiar with the incident told gCaptain that it involved a crankcase explosion in one of the ship’s diesel engines, although the Coast Guard has not confirmed the cause. The service subsequently said Healy would miss its planned 2026 high-latitude Arctic mission.