Rule No. 1 for driving a 13,000-ton icebreaker: Go slow

Master Mariner Jyri Viljanen, captain of the Finnish icebreaker MSV Nordica. pushes the thruster Wednesday, July 19, 2017, while demonstrating the ship's maneuverability while sailing the Dolphin and Union Strait off the coast of Canada through the Arctic's Northwest Passage. Icebreakers with azimuth thrusters, such as the Nordica, are extremely maneuverable and can change direction very quickly, allowing the ship to avoid many unnecessary encounters with ice that would otherwise slow it down.
Master Mariner Jyri Viljanen, captain of the Finnish icebreaker MSV Nordica. pushes the thruster Wednesday, July 19, 2017, while demonstrating the ship's maneuverability while sailing the Dolphin and Union Strait off the coast of Canada through the Arctic's Northwest Passage. Icebreakers with azimuth thrusters, such as the Nordica, are extremely maneuverable and can change direction very quickly, allowing the ship to avoid many unnecessary encounters with ice that would otherwise slow it down.

THE ARCTIC CIRCLE - Learning to drive an icebreaker like the MSV Nordica is a bit like taking dance lessons.

You start slow, with a few turns and twists on the open sea to get a feel for the way the ship moves.

Next step, add some hazards.

I got my chance to take the controls as two fellow Associated Press journalists and I travel aboard the Nordica through the Arctic Circe's Northwest Passage. Granted, it was only for five minutes and the captain was standing next to me, ready to step in if necessary, but it was still a daunting moment.

Despite the name, icebreakers will avoid hitting ice unless they have to. In a sea filled with floating chunks of frozen water, each weighing several tons, the ice navigator will look for the path of least resistance and relay it to the person at the helm, who ultimately decides which course to take.

Icebreakers with azimuth thrusters, such as the Nordica, are extremely maneuverable and can change direction very quickly, allowing the ship to avoid many unnecessary encounters with ice that would otherwise slow it down.

Still, keeping several pieces of moving ice in mind, as well as possibly other ships and shallows that could ground the vessel, has been compared to an elaborate waltz in a crowded ballroom.

Now imagine doing that blind, as would be the case when it's nighttime, there's heavy snow, or the ice is "smoking" - a particular weather condition in which sea ice produces a dense fog.

While icebreakers are equipped with sensitive radar systems, ultimately it's up to the ability and experience of the person at the helm to ensure the ship only breaks ice when it's unavoidable.

According to Nordica's captain, Jyri Viljanen, only lots of supervised practice can adequately prepare a person for the challenges of steering the ship.

When you're in charge of a 13,000-ton, 380-foot icebreaker, you don't want to be stepping on anyone's toes.

NEXT: Portraits of an icebreaker crew, researchers

PREVIOUS: Battering Rams of the Arctic: Icebreakers Explained

FIRST: Global warming melts ice, alters fabled Northwest Passage

Upcoming Events