SS Aud

The Aud was a 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 SMU UB-18 at 50.31667°N, -5.55°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. Captain Andreas Stehen and his men were later picked up by the Spanish steamer SS Alu Mendi out of Bilbao, which had also been stopped and searched by UB-18 but released. They returned to Norway unharmed.

In April 1916, the German steamer Libau posed as the neutral Aud when delivering a cargo of rifles for the Easter Rising.