German(?) submarine observing steamship courses in the Mediterranean according to the Kriegsnachrichten of the Chef des Admiralstabes der Marine dated Berlin 28 August 1917

An item reported that an submarine in begin August observed the steamship course 45° between 31.39 North and 30.1 East and steamship course 180° off Port Said, Egypt 31.45 North and 32.40 East.

Source

Bundesarchiv RM-40-622