Canada’s Arctic Offshore Patrol Ship (AOPS)

Ran across an interesting presentation of the design of Canada’s projected Arctic Offshore Patrol ship (pdf). This apparently dates back to 2008, but it is the most detailed presentation I have seen on their concept.

While probably not as capable as the Healey, which is more than twice as large, something similar might be able to fill the Coast Guard’s stated requirement for two additional medium icebreakers.

The design has several interesting features

  • It is designed to IACS Polar Class 5, “Year-round operation in medium first-year ice which may include old ice inclusions” with a double acting hull form.
  • It includes three RHIBs and a landing craft, in addition to two 70 man covered lifeboats.
  • Flight Deck and hanger sized to support a helicopter larger than the H-60 (the CH-148).
  • Propulsion is diesel electric using Azipods. Power is provided by four generators¬† (Can’t say I’m comfortable with how they achieved redundancy by using a centerline bulkhead to split two main machinery spaces into four).
  • It incorporates provision for carrying five containers, and has a 10 ton crane on the main deck aft.
  • Requires a relatively small crew (45) but includes provision for an additional 40.

Compared to the Wind Class Icebreakers that once made up most to the Coast Guard fleet, they are slightly larger (6,940 tons vs 6,500), much longer (359.5 ft vs 269), narrower (59.7 ft vs 63.5), much more powerful (20,100 HP vs 12,000), and faster (20 knots vs 16.8).

Compared to the Norwegian Coast Guard vessel Svalbard on which it is based it is 50% more powerful.

We can’t be sure at this point, that this is the ship the Canadian’s will build, but it’s probably pretty close.




23 thoughts on “Canada’s Arctic Offshore Patrol Ship (AOPS)

    • Thanks, Nice presentation. That is a lot of boats, (Up to five). The speed (17) is a little disappointing, but of course the ship is a compromise. Not using Azipods after all.

      Updated specs from the pdf:

      LOA 98.0 m
      LWL 91.0 m
      LBP 86.4 m
      BOA 19.0 m
      BWL 18.4 m
      T 5.75 m
      Displacement 5874 tonnes
      Installed Power
      (Gensets) 4 x 3300 kW
      (Propulsion Motors) 2 x 4500 kW

  1. I really confused about the propulsion system of polar-class5,some magazine says it has a double-shaft propulsion,but in you text it has diesel electric using Azipods.I want to know which is ture.
    And,I’m a layman, i guess wether we can equip them all.Using the double-shaft thruster for main propulsion,and the Azipods act as a Auxiliary power?

    I’m looking forward your reply!~

  2. Pingback: “Moving North–Arctic Capable Ships Enable Navies, Coast Guard to Patrol Extreme Latitudes”–Seapower | Chuck Hill's CG Blog

  3. There’s some talk about building two additional AOPS for the Canadian Coast Guard:

    For now, it mainly seems to be a production-line extension to support Irving, not something that the CCG has requested.

    My primary fear is that with the AOPS being “ice-capable”, someone may think it’s a perfect replacement for CCG’s ageing medium-heavy icebreaker fleet.

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