Current Coast Guard Icebreakers: CCGS Henry Larsen (medium icebreaker, top photo), CCGS Terry Fox (heavy icebreaker, bottom photo)
Below are two news releases, first a release by Chantier Davie Canada Inc. (Davie) and second a statement from the Canadian Coast Guard.
The release from Davie is new (it also has an illustration). The Canadian Coast Guard statement dates from July 2019. I added it because it outlines what is expected of the new icebreakers.
The Davie news release says these will be the “largest and most advanced icebreakers ever built in and for Canada.” Currently the largest Canadian Icebreaker is CCGS Louis S. St-Laurent which is 15,324 tons full load, 119.8 m (393.04 ft) in length, and has three electric motors, 3 × 6,714 kW, or 27,011 HP total. Presumably these will be larger and more powerful, still the new icebreakers may turn out to be medium icebreakers, at least according to the US Coast Guard classification system that is based on horsepower, e.g. 20,000 to 45,000 HP are medium icebreakers.
The Davie release also notes, “Davie is a part of Group Davie, which in November 2023 acquired Finland’s Helsinki Shipyard, the world leader in icebreaker design and construction.” Maybe a good idea to buy the expertise you need.
March 26, 2024
Lévis, Canada – March 26, 2024 – Chantier Davie Canada Inc. (Davie) today announced it has been awarded its first National Shipbuilding Strategy (NSS) contract by the Government of Canada for the design of the six-ship fleet of Canada’s future Program Icebreakers. This major milestone marks the beginning of Davie’s NSS work package to replenish Canada’s Arctic fleet and each initiative under the contract will help advance upcoming design, construction, delivery and support phases for these strategic ships.
The Honourable Jean-Yves Duclos, Canada’s Minister of Public Services and Procurement (PSPC) said: “This first contract awarded to Chantier Davie under the National Shipbuilding Strategy brings us a step closer to providing the Canadian Coast Guard with the next generation Arctic ships. They will be among the most advanced, sustainable and durable vessels tailored to the world’s harshest environments. The new fleet will be symbolic of Canada’s Arctic presence and crucial to keeping our country open for business year-round.”
Davie President and CEO, James Davies, said: “This is a momentous first step in our journey to deliver a fleet of the largest and most advanced icebreakers ever built in and for Canada. My heartfelt thanks go to the dedicated teams at Davie, the Canadian Coast Guard and PSPC. They have spent countless hours preparing for this historic milestone. Now, we can’t wait to get working on renewing Canada’s Arctic fleet.”
Davie will establish a Program Icebreaker project management and design office, providing compelling opportunities for current and future generations of Canadian shipbuilders. Davie is committed to recruiting teams of highly skilled shipbuilding professionals, who will drive all aspects of constructing the world’s largest order book of heavy icebreakers.
Moreover, Davie will engage critical subcontractors to design and certify the vessel to established safety, environmental, and performance standards. Building on Davie’s proven track record of delivering vessels of exceptional quality and performance, this early phase is fundamental in guaranteeing sustained operational readiness and capability to best serve the CCG’s missions.
Julian Kenney, Program Director for the Program Icebreakers at Davie, said: “Embarking on the design and construction of Canada’s new icebreaker fleet is a great source of pride for everyone at Davie. We have a strong partnership with the Canadian Coast Guard and our top priority is to design and build the icebreakers Canada needs to keep our waterways open, protect our environment, and secure the Arctic.”
About Davie
Based in Québec, Canada since 1825, Davie is a world-class designer and builder of specialist, mission-critical ships such as icebreakers, ferries and warships for government and commercial customers. Davie became a partner in the Government of Canada’s National Shipbuilding Strategy on April 4, 2023. This historic agreement is for the design and construction of the largest and most technologically advanced ships ever constructed in and for Canada. The initial $8.5 billion package of work includes seven heavy icebreakers and two large hybrid-powered ferries. Davie is a part of Group Davie, which in November 2023 acquired Finland’s Helsinki Shipyard, the world leader in icebreaker design and construction. Find out more at davie.ca and helsinkishipyard.fi.
For further information, please contact: Marcel Poulin Director, External Affairs and Industrial Participation, Davie marcel.poulin@davie.ca +1 581 992-8564
Canadian Coast Guard’s new Icebreakers
Backgrounder
As part of the Government of Canada’s National Shipbuilding Strategy and in accordance with the Canadian Coast Guard’s fleet renewal planning, six new icebreakers will be built for the Coast Guard. These icebreakers are fundamental to year-round safe and efficient movement of ships and goods in Canadian waters.
The new program icebreakers will replace the Coast Guard’s heavy and medium icebreakers that operate in Atlantic Canada and the St. Lawrence waterways during the winter and in the Arctic during the summer. In Atlantic Canada, these program icebreakers help ensure year-long ferry service, escort ships through ice-covered waters and the clearance of ice from harbours and wharfs, which is essential to Canada’s commercial fisheries. In the Arctic, they provide icebreaking support to ships with vulnerable cargoes, such as dangerous goods and perishable products, and support vessels transporting cargo that is a vital part of the northern communities’ sealift and resupply.
The new program icebreakers will be built at a third strategic shipyard that will be selected through a competitive process under the National Shipbuilding Strategy.
Chuck Hill's CG Blog 
Hi Chuck, details on the new Canadian Polar Class icebreakers, of which there will be 2, can be found here (see minute 16:07 of the embedded video clip for even more detail):
https://www.seaspan.com/seaspan-shipyards/shipbuilding/polar-icebreaker/
And here:
https://new.abb.com/news/detail/112993/abb-partners-with-seaspan-shipyards-on-new-canadian-coast-guard-polar-icebreaker
To sum up, around 24,000 t, and 34MW (45,000 HP) installed power. So, these will definitely be classified as Heavy, by any country’s standards. The first of class has started building at Seaspan, and is expected to be handed over to the CCG around 2030. The second of class is expected to be built by Davie (along with the 6 Program icebreakers, of which there is not a lot of detail).