Warships and merchant ships arrived at Gibraltar according to the Kriegsnachrichten of the Chef des Admiralstabes der Marine dated Berlin 16 August 1917

British Formidable-clas battleships©Warshipsresearch.blogspot.com

An item reported that between 10-14 August coming from the west arrived 1 British steam transport, 13 British steamships, British warship Irresistible (1), 1 American steamship armed with 2 guns, 2 Italian steamships, 1 Norwegian steamship, 2 Belgian steamships, 1 Danish steamship and 4 steamships.

Note

1. This can’t be HMS Irresistible. Laid down by Chatham Dockyard on 11 April 1898, launched on 15 December 1898, completed in October 1901, commissioned on 4 February 1902 and lost on 18 March 1915 in the Dardanelles. Part of Formidable-class precedeed by Canopus-class succeeded by London-class.

Source

Bundesarchiv RM-40-622