The Importance of Straits: A Legal, Environmental, and Strategic Perspective

"Straits are the lifelines of international maritime trade. Over the past two decades, maritime trade has doubled, with much of this cargo passing through straits, the chokepoints of global navigation," Alexander Lott explained. He is a senior researcher at Norwegian Centre for the Law of the Sea (UiT), currently on board the sailing ship Statsraad Lehmkuhl to lecture in the course Arctic Future Pathfinders.

The sailing ship was originally supposed to go through the complex system of straits known as the Northwest Passage. Due to dangerous navigation conditions the Canadian authorities denied the ship permission to enter the Northwest Passage. In his session, Lott focused on the legal dimensions of Canada’s decision under the international law of the sea.

Two students looking at an inflatable earth — The students have lessons every day, about different topics in the Arctic. Here represented by Bálint Timári (to the left) and Norja Walther. Foto: Karine Nigar Aarskog / UiT

Lott also explored the complexities of navigation regimes and the broader implications for global trade, security, and marine ecosystems.

The Northwest Passage: A potential route

While straits like the Strait of Dover and the Strait of Malacca are among the busiest in the world, the Northwest Passage remains relatively underutilized, with only about 40 ships that cross the entire passageway annually.

"Even the Åland Strait, a minor strait at the entrance to the Gulf of Bothnia in the Baltic Sea, sees more daily traffic than the Northwest Passage does in a year," Lott noted.

However, aside its potential as a shorter trade route, the Northwest Passage holds also a unique strategic value.

"It provides a potential route for naval forces to move between the Atlantic, Arctic, and Pacific Oceans," Lott said.

Navigational Regimes: A Legal Labyrinth

The session delved into the legal intricacies of navigation regimes, which govern the movement of ships and aircraft through straits. These regimes include the right of innocent passage, transit passage, and freedom of navigation and overflight.

"Innocent passage applies within the territorial sea, allowing ships to navigate without prior authorization, provided their passage is not prejudicial to the peace, good order, or security of the coastal state," Lott explained.

"Transit passage, on the other hand, is specific to international straits and guarantees freedom of navigation and overflight."

A person standing talking. — Alexander Lott is a senior researcher at UiT. Foto: Karine Nigar Aarskog / UiT

The Northwest Passage, however, is subject to Canada's assertion that it constitutes "non-international straits," requiring prior authorization for passage.

"This creates a parallel legal regime, with Canada and the United States holding conflicting views on the applicable navigation rights," Lott noted.

"Such disputes have the potential to escalate into diplomatic or even kinetic conflicts, as we've seen in other parts of the world, like the Kerch Strait and the Strait of Hormuz."

Environmental Significance: A Forgotten Perspective

Lott also highlighted the often-overlooked environmental importance of straits.

"Straits are not just vital for human navigation; they are equally crucial for marine species. They serve as natural corridors connecting large marine ecosystems, facilitating the migration of fish, marine mammals, and birds," Lott emphasized.

However, human activities often disrupt these natural pathways.

"Physical barriers like causeways, acoustic pollution from naval operations, and artificial light pollution all impede the movement of marine species," Lott explained.

Two people talking to each other. — Alexander Lott together with researcher Rebekka Steene at the deck of Statsraad Lehmkuhl. Foto: Karine Nigar Aarskog / UiT

He also pointed to the impact of infrastructure on bird populations.

"Power lines over straits, such as those in the Bosporus and the Canso Strait, which is relatively close to our final destination in St John’s, are often invisible to birds, leading to fatal collisions," he said.

A Call for Balance

The workshop concluded with a call for a balanced approach to managing straits.

"Straits are at the intersection of trade, security, and environmental conservation. Understanding their legal regimes is essential for safeguarding navigation rights while protecting the fragile ecosystems they connect," Lott said.

As the Arctic continues to warm and maritime traffic increases, the importance of straits like the Northwest Passage will only grow.

"Whether for trade, security, or environmental reasons, straits are far more than just waterways—they are critical to the future of our interconnected world," Lott concluded.

Aarskog, Karine Nigar karine.n.aarskog@uit.no Seniorrådgiver kommunikasjon

Published: 17.08.25 16:30 Updated: 17.08.25 16:49

Arctic Arctic Future Pathfinders Law & order