As aircraft carrier
As battle cruiser
An item referred to the magazine Aeroplane dated 5 October 1939 reporting that the British aircraft carrier HMS Courageous was protected by 4 destroyers. However when the evening fall was she left by 2 destroyers hunting for a submarine which herself hunted for a merchant ship. When the Courageous changed her course into an adverse wind direction to be used as a landing platform for her own aircraft was she herself torpedoed by a submarine.(1)
Note
1. Of the Courageous-class battle cruisers consisting of the Glorious, Courageous and Furious which were of a special design with in fact hardly armour and just a few heavy guns especially for service in the Baltic area. Also indicated as large light cruisers. Preceded by the Renown-class and succeeded by the Admiral-class. Building ordered on 14 March 1915, laid down at Sir W.G. Armstrong Whitworth&Co. Ltd,, Newcastle upon Tyne, England on 26 March 1915. Launched on 5 February 1916, completed on 4 November 1916, converted into an aircraft carrier between June 1924-February 1928 and finally sunk by the German submarine U-29 off the Irish coast on 17 September 1939. Pennant number 40. Nicknamed Outrageous. Building costs 2.038.225 pound sterling.