SS Orduña or Orduna was an ocean liner built in 1913–14 by Harland and Wolff in Belfast for the Pacific Steam Navigation Company.

[4] In January 1915 Orduña rescued the Russian crew of the sailing ship Loch Torridon, which had sprung a leak while transporting timber off the west coast of Ireland.

Orduña was also registered as an auxiliary cruiser during the war, and from late 1915 was used as a troop transport, running from Halifax, Canada to Liverpool, sometimes using a fake gun.

In 1925, Dean James E. Lough of the Extra-Mural Division of the New York University chartered Orduña for the transport of 213 students to France, with lectures taking place on board.

In September 1938 she was at Nassau, Bahamas and Kingston, Jamaica[11] During the 1939 "Voyage of the Damned" affair, where German Jewish refugees were refused entry into Cuba, the United States and Canada, Cuban authorities allowed only 48 passengers, all of whom held landing permits, but refused permission for the remaining 72 passengers aboard the Orduña to land in Havana.

In 1947 conditions for troops returning from Port Said in Egypt on the Orduña, said to include overcrowding and poor food, were raised with the Secretary of State for War.