Seaspan celebrates naming and launch for the HMCS Protecteur North Vancouver, BC – Seaspan Shipyards was proud to host on December 13 the naming ceremony and launch celebration for the Royal Canadian Navy's (RCN) new Joint Support Ship (JSS), the HMCS Protecteur – the longest naval vessel ever constructed in Canada. The future HMCS Protecteur is the fifth ship designed, built and launched by Seaspan under the National Shipbuilding Strategy. The ceremony represented years of hard work and the collective efforts of thousands of Seaspan employees, the Government of Canada and Royal Canadian Navy, as well as hundreds of others across Seaspan's pan-Canadian supply chain.