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Rocky Mountain-class Fleet Replenishment Oiler

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A Rocky Mountain-class fleet replenishment oiler.

The Rocky Mountain-class Fleet Replenishment Oiler is a large class of auxiliary vessel in service the Canadian Forces Maritime Command from 2003 onwards built to replace the aging Provider and Protecteur-class fleet replenishment oilers. Originally there were only five vessels planned, however in the mid-2010s, another five Rocky Mountain-class oilers were planned for construction after the Titan-class fleet supertankers were commissioned.

The vessel design was a 840-foot-long double-hulled vessel, which had three bunkers - two for marine diesel and one for aviation fuel, though all three could be used for marine diesel if needed - which had four refueling rigs and a large helipad on the end of the vessel. Four loading cranes also were installed, and the vessel could also carry 155 20-foot containers of the same design as used by the Canadian Forces. The vessel, which also could serve as a command center and mad many advanced features, was powered by eight geared General Motors Model 265 turbodiesel engines, giving the 52,000-ton vessel a maximum speed of some 24 knots (44.45 km/h), faster than the Provider and Protecteur-class vessels.

The design, which would called the Rocky Mountain-class, was approved by parliament on November 14th, 2000. The first was laid down on January 10th, 2001, at the MIL Davie Shipyards in Lauzon, Quebec.

In the late-2010s, Canada ordered a further five Rocky Mountain-class replenishment oilers.


  • Type: Fleet Replenishment Oilers (Hull designation symbol AOR)
  • Service Period: 2003-
  • Builders: SNC Lavalin, MIL-Davie Shipbuilding
  • Characteristics
    • Length: 840 feet (256.03 meters)
    • Beam: 106 feet (32.31 meters)
    • Height (Overall): 154 feet (46.94 meters)
    • Displacement: 52,000 tons
  • Crew: 394 officers, enlisted, and air crew
  • Power:
  • Propulsion: 8 x General Motors Model 265 turbodiesel engines
  • Range:
  • Speed: 24 knots (44.45 km/h)
  • Sensor Suite
    • AN/SPS-49A(V)1 2D Air Search Radar
  • Armament
    • 2 x Otobreda 76mm lightweight gun
    • 2 x 20mm Vulcan Phalanx CIWS
  • Aviation Facilities: 1 large flight deck, and facilities
  • Aircraft: 4 x CH-147C Chinook heavy lift transport helicopters

Unit Run[edit]


  • HMCS Rocky Mountain (AOR-511)
  • HMCS Niagara Falls (AOR-512)
  • HMCS Lake Louise (AOR-513)
  • HMCS Mount Logan (AOR-514)
  • HMCS Baffin Island (AOR-515)
  • HMCS Vancouver Island (AOR-518)
  • HMCS Ellesmere Island (AOR-519)
  • HMCS Nunavut (AOR-520)
  • HMCS Caicos Banks (AOR-521)
  • HMCS Mont Royal (AOR-522)

South Africa[edit]

  • SAS Outeniqua (A304)
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