Is the promise of military icebreakers political theatre or sensible policy?

A former top naval commander and several defence experts have been left scratching their heads following the governing Liberals and Opposition Conservatives' recent embrace of the notion of giving the Royal Canadian Navy heavy, armed icebreakers to defend the Arctic.

They question the military sensibility of building — possibly at a cost of billions of dollars — one, two or even three 10,000-tonne or more polar-class icebreakers with guns and missiles, vessels with possibly limited usefulness that would be vulnerable to both air and submarine attack.

"I'm puzzled, because I don't know what it is we're trying to achieve other than the political objective of demonstrating a commitment to Arctic sovereignty. Check. I get it. However, it needs to be sensible, and more importantly, it needs to be practical," said retired vice-admiral Mark Norman in a recent interview.

Canada's defence in the Far North was a topic brought up when Prime Minister Mark Carney met with U.S. President Donald Trump in the Oval Office on Tuesday. A senior Canadian government official said the two leaders spent a lot of time talking about the Arctic.

During the recently concluded federal election campaign, the Liberals promised to "expand the capabilities of the navy with new submarines and additional heavy icebreakers," while the Conservatives were more explicit, saying they would build two additional polar icebreakers for the military.

If the promise of heavy militarized icebreakers sounds familiar, it's because it was made before. Back in 2006, the former Conservative government of prime minister Stephen Harper rode to power on a pledge to build heavy military icebreakers for the navy.

Ultimately, the high construction cost and the fact the vessels would have utility only four months of the year led to the design and creation of Arctic and offshore patrol ships (AOPS), light icebreakers which can operate and patrol off all three of Canada's coastlines. The navy plans on deploying six AOPS and the coast guard is expected to receive two.

For Norman, there is a sense of déjà vu about the renewed debate.

"We went through this very issue in 2007-08 up to the 2010-12 timeframe, where we had a government of the day that was quite explicit about what they wanted, but couldn't explain why they wanted it," said Norman.

"I get it, the government gets to decide. But at the end of the day, it doesn't make a lot of sense."

The coast guard is usually the home of Canada's unarmed icebreaking fleet. The Liberals, however, have promised to rewrite the service's mandate to conduct maritime surveillance and integrate them into Canada's NATO defence capabilities. Whether that means arming them is unclear.

Norman said there needs to be a clear division of responsibilities between the navy and the coast guard.

"We need to decide what we're trying to achieve. If it's surveillance, there's lots of other ways to achieve surveillance," said Norman. "I'm concerned because as soon as we list things that we want to buy, we lose track of what it is we're trying to achieve. And then the entire machinery [of government] becomes focused on buying something which may or may not make sense."

Canada, with 18 registered ice-capable boats, has the second-largest number of icebreakers in the world after Russia, which reportedly has 57. And only one of those Russian ships, the Ivan Papanin, is specifically built for combat and has just recently entered service. China has a handful of medium icebreakers in its navy.