**OVERVIEW:** The 878 *Corner Brook* [Upholder Class] is a diesel-electric submarine operated by the Royal Canadian Navy, commissioned in 2022. The *Corner Brook* represents a significant asset for Canada's maritime security, capable of operating in both littoral and open ocean environments.

**DETAILS:**

The Upholder-class submarines were originally designed and built for the Royal Navy in the late 1980s as a cost-effective and quiet alternative to nuclear-powered submarines, intended for patrol and anti-submarine warfare in the North Atlantic. The class was ultimately deemed surplus to requirements following the end of the Cold War. Canada acquired the four Upholder-class submarines in the late 1990s, renaming them the Victoria class. These vessels filled a critical capability gap in the Royal Canadian Navy, providing a much-needed underwater presence. The *Corner Brook*, after undergoing extensive modernization and refit programs, re-entered service in 2022 representing the ongoing commitment to maintaining a modern and effective submarine force. The acquisition and subsequent refit programs of these submarines highlight the strategic importance of submarine capabilities for Canada's maritime security.

The primary roles of the *Corner Brook* are anti-submarine warfare (ASW), anti-surface warfare (ASuW), intelligence gathering, and covert surveillance. The *Corner Brook's* diesel-electric propulsion system allows for extended submerged endurance and quiet operation, crucial for covert missions. The submarine is capable of deploying special forces, supporting joint operations, and conducting maritime interdiction operations. The integration of modern communications systems enables the *Corner Brook* to maintain secure and reliable communication links with shore-based command centers and other allied units. The platform's inherent stealth, combined with its sensor suite, allows it to conduct effective maritime domain awareness operations, contributing to national security and international cooperation.

The *Corner Brook* is equipped with a sophisticated suite of sensors and systems enhancing its operational effectiveness. The AN/BQQ-10 sonar provides long-range detection and tracking of underwater targets. The Type 2041 passive ranging sonar (PRS) allows for precise localization of underwater threats through triangulation. The Type 2019 DUUG 2 towed array sonar further enhances the submarine’s ASW capabilities by providing extended detection ranges and improved target classification. The Type 1007 navigation radar supports safe navigation and situational awareness on the surface. The SUBTASS passive sonar system provides a comprehensive underwater acoustic picture, improving target detection and classification. The Type 2046 towed array enhances passive detection capabilities, especially in noisy environments. The CA/ULR-501 Seasearch II radar offers surface search and target acquisition capabilities. The CK035 / CH085 periscope suite provides both visual and electronic observation capabilities. The 533mm torpedo tubes provide a potent offensive capability against both surface and subsurface targets, with the signal ejector system allowing for the launch of countermeasures.

**SPECIFICATION:** Length: 70.3 m || Beam: 7.6 m || Draft: 5.5 m || Disp: 2168 t

**SENSORS:** AN/BQQ-10 || Type 2041 [PRS] || Type 2019 [DUUG 2] || Type 1007 || SUBTASS || Type 2046 || CA/ULR-501 Seasearch II || CK035 / CH085 Periscope Suite

**ARMAMENT:** Signal Ejector || 533mm TT