The Canadian Coast Guard’s largest and most powerful icebreaker, CCGS Louis S. St-Laurent, reached the Geographic North Pole on 16 August during its 2026 Arctic deployment. The voyage forms part of a multi-year Canadian mission to collect seabed and hydrographic data in support of the country’s continental-shelf submission under the United Nations Convention on the Law of the Sea.
The arrival at 90° North marks an operational milestone for the veteran heavy icebreaker, which has served as a central platform for Canadian Arctic science and sovereignty missions for more than five decades. The vessel’s work this summer supports Natural Resources Canada and Fisheries and Oceans Canada, with the wider field programme scheduled to run from 2024 to 2027.
Mapping the Arctic seabed
Its 2026 deployment combines scientific and operational functions. The Canadian Coast Guard described the mission as evidence of its ability to operate in remote and difficult Arctic waters, while Defence Minister David McGuinty said the North Pole transit supports scientific knowledge, Canadian presence and sovereignty in the North.
“The arrival of CCGS Louis S. St-Laurent at the North Pole is an important milestone that reflects Canada’s enduring commitment to the Arctic. Supported by the expertise of Canadian Coast Guard personnel, this mission advances scientific knowledge, strengthens our presence in the North, and reinforces Canada’s sovereignty and security.”
The Honourable David J. McGuinty, Minister of National Defence
The expedition is collecting high-resolution geoscientific and hydrographic information in the high Arctic. Canada intends to use the data to help define the outer limits of its continental shelf, the submerged extension of a country’s land territory beneath the seabed.
Under UNCLOS, coastal states can claim rights over resources on parts of the seabed beyond their 200-nautical-mile exclusive economic zone if they can demonstrate that the seabed forms a natural prolongation of their continental margin. Such rights concern the seabed and subsoil, not control over the water column or shipping routes above it.
A veteran icebreaker
The Canadian Coast Guard currently operates a fleet of nine icebreaker, of which two are classed as heavy icebreakers and seven as medium icebreakers. Commissioned in 1969, Louis S. St-Laurent is the longest-serving vessel in the Canadian Coast Guard’s heavy icebreaking fleet and the Coast Guard’s flagship. The 119.60 m long ship has a cruising range of 28000 nm and a maximum speed of 18 kn. It features a helicopter hangar, housing two on-board helicopters, various labs for conducting science and normally carries a crew of 42 people, but can house up to 100 people depending on its mission. After being originally scheduled for decommissioning in the years 2000 and 2017, the ship has undergone major modernisation work during its operational life, allowing it to continue operating in demanding Arctic conditions while supporting science, resupply and government missions.
The vessel has previously taken part in extensive seabed-mapping campaigns in the Arctic Ocean, including joint expeditions with the United States Coast Guard. Those missions used multibeam sonar, seismic measurements and geological sampling to examine the Lomonosov Ridge, Alpha Ridge and other submarine features relevant to continental-shelf claims.
Arctic presence and fleet renewal
Canada’s annual Arctic summer operational season generally runs from June to November. During that period, Coast Guard icebreakers provide services to northern communities, support scientific work and contribute to federal operations across the Arctic.
The North Pole mission also takes place as Canada is increasing its focus on Arctic security and infrastructure. Changing sea-ice conditions are increasing access to parts of the Arctic Ocean, while commercial shipping, scientific activity and strategic competition are drawing more attention to the region.
At the same time, Louis S. St-Laurent is again approaching the end of its service life. Canada is renewing its icebreaking capability through the construction of two new polar icebreakers under the governments Polar Icebreaker Project as part of the National Shipbuilding Strategy. The two vessels, CCGS Arpatuuq and CCGS Imnaryuaq, which are currently under construction are intended to provide greater endurance and more sustained operational capacity in the High Arctic as older vessels are retired.
Dr. Jan Benedict Spannenkrebs / Polar Journal