White Star's SS Laurentic struck two mines on this date in 1917 and sunk off the coast of Ireland. The mines had been placed in that location by a German mine laying submarine. The Laurentic was on her way to the UK from Halifax.
She had not originally been scheduled to be in that area but had stopped at a British naval base in Ireland to disembark four passengers with symptoms of yellow fever. 354 passengers lost their lives in the sinking. 121 survived. Bodies washed up on shore for weeks.