Shipping traffic coming from Gibraltar heading east ccording to the Kriegsnachrichten of the Chef des Admiralstabes der Marine dated Berlin 16 August 1917

An item reported the ships coming from Gibraltar heading east between 10-14 August: 1 French steamship, 1 Japanese steamship, 14 British steamships; as part of a convoy 5 British steamships, 1 Norwegian steamship, 1 Italian steamship armed with 2 guns, 1 Norwegian steamship, 1 British steam transport, 2 Italian steamships, 1 Spanish passenger steamship, 1 American steamship armed with 2 guns, 2 Spanish steamships and 1 British steamtug with lighter.

Source

Bundesarchiv RM-40-622