Construction of the Royal Canadian Navy’s second Joint Support Ship, HMCS Preserver, has reached a significant milestone, bringing Canada closer to restoring a critical naval capability that has been absent for much of the past decade.

HMCS Preserver Reaches Major Construction Milestone as Canada Rebuilds Naval Sustainment Capability

According to shipbuilder Seaspan, installation of both replenishment-at-sea (RAS) kingposts has been completed, marking the vessel’s full structural consolidation. The achievement signifies that all major structural components have now been integrated into the hull and superstructure, allowing work to progress toward outfitting, systems integration and eventual launch preparations.

The two 30-tonne kingposts form the core of the ship’s replenishment-at-sea system, enabling the transfer of fuel, ammunition, supplies and other cargo between vessels while underway. Their installation represents the final major structural addition to the ship and a key step toward delivering the Royal Canadian Navy’s future sustainment fleet.

HMCS Preserver is the second vessel in Canada’s Protecteur-class Joint Support Ship program. It will join sister ship HMCS Protecteur, which was launched in 2024 and is currently undergoing outfitting and testing. Together, the ships will replace the aging Protecteur-class auxiliary oiler replenishment vessels that were retired after decades of service.

A Critical Capability for a Global Navy

For the Royal Canadian Navy, the significance of the Protecteur-class extends far beyond replacing retired support vessels.

While often described as supply ships, the new vessels are designed to perform a much broader range of missions than traditional replenishment ships. The Joint Support Ships will enable Canadian naval task groups to remain at sea for extended periods without returning to port for fuel and supplies, a capability essential for sustained operations across the Atlantic and Pacific oceans and during deployments with allied fleets.

Beyond their logistics role, the ships will serve as multi-mission platforms equipped with command-and-control facilities, medical services, sealift capacity and extensive aviation support capabilities. They are also expected to play an important role in humanitarian assistance and disaster-relief operations, where large cargo capacities and self-sustaining logistics are often critical.

Built for Modern Operations

In addition to restoring replenishment capabilities, the Protecteur-class has been designed to support the demands of modern naval operations.

Based on the proven German Berlin-class design but extensively modified for Canadian requirements, the ships combine sustainment functions with advanced command, communications and support systems.

The vessels will be capable of operating and supporting CH-148 Cyclone maritime helicopters, enhancing surveillance, maritime security and anti-submarine warfare operations. Meanwhile, NATO-compatible communications and command systems will allow them to integrate seamlessly into multinational task groups and, when required, serve as command platforms for coalition operations.

The ships are also being equipped with modern self-defence systems, including remote weapon stations designed to counter airborne and surface threats. As construction progresses, key elements supporting these defensive systems have already been incorporated into Preserver’s superstructure.

Restoring Strategic Independence

Since the retirement of Canada’s previous replenishment vessels, the Royal Canadian Navy has relied on interim solutions and support from allied nations to maintain at-sea logistics capabilities.

Against that backdrop, the Joint Support Ship program represents far more than a fleet modernization effort. The arrival of HMCS Protecteur and HMCS Preserver will restore Canada’s sovereign ability to sustain naval operations independently across global theatres while strengthening its contribution to international security missions.

At nearly 174 metres in length, the Protecteur-class ships are the largest naval vessels ever built in Canada and among the most significant projects under the National Shipbuilding Strategy. Their introduction will substantially enhance the Royal Canadian Navy’s operational reach, resilience and flexibility, enabling it to respond more effectively to military operations, humanitarian crises and disaster-relief missions.

With HMCS Preserver now structurally complete, attention turns to outfitting and systems integration. In the years ahead, the ship and its sister vessel are expected to become central enablers of Canadian naval operations, providing the endurance and support required for deployments wherever national and allied interests demand.