Vancouver facility. The Canadian-built aircraft were powered by Pegasus IX engines and were supplied to Nos 6 and 4 (BR) Squadrons. However, by the time quantity manufacturing had been attained in Vancouver, it was becoming increasingly recognised that the Shark was too obsolete to fulfil Canada's ongoing wartime needs. Nevertheless, these aircraft produced were deployed for naval reconnaissance and the escorting of friendly shipping near to Canada. The last of the RCAF's Sharks, some of which were operated as floatplanes, were withdrawn from service during August 1944, after which five aircraft were transferred to the RN Air Observers' School in Trinidad. Variants B-3 : Torpedo-bomber prototype. B-6 : Shark prototype. Shark Mk I : Two- or three-seat torpedo bomber, reconnaissance aircraft for the Royal Navy. Powered by a 700 hp (500 kW) Armstrong Siddeley Tiger IV radial piston engine. Shark Mk II : Two- or three-seat torpedo bomber, reconnaissance aircraft for the Royal Navy and RCAF. Powered by a 760 hp (570 kW) Armstrong Siddeley Tiger VI radial piston engine. Shark Mk IIA : Two- or three-seat torpedo bomber, reconnaissance floatplanes for the Portuguese Navy. Powered by a 760 hp (570 kW) Armstrong Siddeley Tiger VIC radial piston engine. Six built. Shark Mk III : Two- or three-seat torpedo bomber, reconnaissance aircraft for the Royal Navy. Fitted with a glazed canopy and dual controls for crew training. Powered by an 800 hp (600 kW) Bristol Pegasus III radial piston engine. Operators Royal Canadian Air Force No. 4 Squadron RCAF No. 6 Squadron RCAF No. 7 Squadron RCAF No. 111 Squadron RCAF No. 118 Squadron RCAF No. 122 Squadron RCAF Portuguese Navy - Six aircraft Royal Navy Fleet Air Arm 701 Naval Air Squadron 705 Naval Air Squadron 753 Naval Air Squadron 755 Naval Air Squadron 757 Naval Air Squadron 758 Naval Air Squadron 767 Naval Air Squadron 774 Naval Air Squadron 780 Naval Air Squadron 785 Naval Air Squadron 810 Naval Air Squadron 821 Naval Air Squadron 822 Naval Air Squadron Royal Air Force Specifications (Shark Mk II) See also References Citations Bibliography Mason, Francis K. The British Bomber since 1914. London: Putnam Aeronautical Books, 1994. . Shores, Christopher, Brian Cull and Yasuho Izawa. Bloody Shambles:Volume One:The Drift to War to the Fall of Singapore. London:Grub Street, 1992. . Taylor, John W.R. "Blackburn Shark." Combat Aircraft of the World from 1909 to the present. New York: G.P. Putnam's Sons, 1969.