- The Royal British Navy charters the cargo steamship SS Manica for conversion into a balloon ship. The first vessel of its kind, the Manica is modified to accommodate observation balloons to help direct fire towards the enemy. A long sloping deck and winch were added, along with a wireless telegraphy house and officer’s quarters. The vessel is later employed in the Dardanelles campaign.
- Warships of the Royal British Navy warships begin a concerted blockade of Germany and its ports
- The British auxiliary cruiser Bayona is torpedoed and sinks off the coast of Scotland. Captain HC Carr and the majority of his officers and crew perish.