SS Aud
 The Aud was a 1102 gross register tons (GRT) Norwegian steamboat built in 1907 in Bergen Norway by Bergen Mekaniske Verksted for J. Kuhnle Jr.. She was stopped and searched on 30 November 1916 by SM UB-18 at 50°19′N 5°33′W when sailing from Cardiff to Lisbon with a load of coal. UB-18's skipper Claus Lafrenz declared the cargo contraband and sunk the ship after putting the crew in the life-boats.