Reference

HMS Opportune has been the name of three ships in the Royal Navy. The HMS Opportune (S20), an Oberon-class submarine, was laid down by Scotts Shipbuilding and Engineering Company on 26 October 1962, as mentioned in the Wikipedia article and Military Wiki. The other two ships, HMS Opportune (G80) and HMS Opportune (1915), were laid down by different companies on different dates. The G80 was ordered from John I. Thornycroft & Company on 3 September 1939, as stated in Wikipedia and Military Wiki. The 1915 HMS Opportune was launched on 20 November 1915, as per The Dreadnought Project.