engaged against the Italians, during which time they were credited with possibly sinking one submarine off Albenga. By the time of the Armistice, there were only a handful of remaining Voughts in French hands, and the type was phased out of service. Royal Navy France had placed an order for a further 50 V-156-Fs in March 1940, with delivery planned from March 1941. Following the defeat of France, this order was taken over by the British government for use by the Royal Navy's Fleet Air Arm, who named the aircraft the Chesapeake. The British required several modifications to the Chesapeake, including the additional fuel tank fitted to the SB2U-3, additional armor and heavier forward firing armament, with four rifle caliber machine guns replacing the single forward-firing Darne machine gun of the French aircraft. Fourteen Chesapeakes were used to equip a reformed 811 Naval Air Squadron on 14 July 1941 at RNAS Lee-on-Solent. The squadron, whose crews referred to it as the "cheesecake", intended to use them for anti-submarine patrols, and they were earmarked for the escort carrier . By the end of October that year, it had been decided that the Chesapeakes were underpowered for the planned duties and would not be able to lift a sensible payload from the small escort carriers. Accordingly, they were withdrawn from 811 Squadron in November 1941 for use as training aircraft and the unit was re-equipped with the biplane Fairey Swordfish. Variants XSB2U-1 Single prototype, powered by a 750hp R-1535-78 engine. SB2U-1 Initial production version powered by an 825hp R-1535-96 engine, 54 built. SB2U-2 Same as SB2U-1 but with minor equipment changed, 58 built. XSB2U-3 Single prototype of the extended-range version with twin floats, converted from the SB2U-1. SB2U-3 Similar to the SB2U-2 but fitted with an 825hp R-1535-102 engine, crew armor and two 0.5in guns, 57 built V-156F-3 Export version for the French Navy, 40 built. V-156B-1 Export version similar to the SB2U-3 and powered by a 750hp R-1535-SB4-G engine for the British Royal Navy. Designated Chesapeake Mk.I; 50 built. V-167 The V-156 company demonstrator was fitted with a more powerful Pratt & Whitney R-1830 engine and redesignated V-167. It remained a one-off. Operators French Navy Aeronavale Royal Navy Fleet Air Arm 811 Naval Air Squadron United States Navy United States Marine Corps Surviving aircraft Only one known survivor exists today: SB2U-2 Vindicator, Bureau Number 1383, is on display at the National