The Henry Martyn Centre blog has a World War One entry on Archdeacon Tom Dennis, translator of the Bible into Union Igbo (a Nigerian language).  He went down when S.S. Karina was sunk by a German U-Boat in August 1917.

SS Karina, sunk 1 August 1917. Photo from E.D. Fleet History
http://www.clydesite.co.uk