SS Ceramic was an ocean liner built in Belfast for White Star Line in 1912–13 and operated on the Liverpool – Australia route. Ceramic was the largest ship serving the route until P&O introduced RMS Mooltan in 1923.
SM U-20 was a German Type U 19 U-boat built for service in the Imperial German Navy. She was launched on 18 December 1912, and commissioned on 5 August 1913. During World War I, she took part in operations around the British Isles. U-20 became infamous following her sinking of the British ocean liner RMS Lusitania on 7 May 1915, an act that dramatically reshaped the course of World War I.
SS Tuscania was a luxury liner of the Anchor Line, a subsidiary of the Cunard Line and named after Tuscania, Italy. In 1918 the ship was torpedoed and sunk by the German U-boat UB-77 while transporting American troops to Europe with the loss of 210 lives.
SS Calgarian was an Allan Line steam turbine ocean liner that was built in 1914 and converted into a Royal Navy armed merchant cruiser. Until 1916 she served with the 9th Cruiser Squadron, patrolling off West Africa and then off the east coast of the United States. She spent the remainder of her career making transatlantic crossings between Canada and Britain.
SS Transylvania was a British passenger liner of the Anchor Line, a subsidiary of the Cunard Line and a sister ship to SS Tuscania. She was torpedoed and sunk on 4 May 1917 by the German U-boat SM U-63 at 44°15′N8°30′E while carrying Allied troops to Egypt and sank with a loss of 412 lives.
HMS Hilary was a Booth Line passenger steamship that was built in Scotland in 1908 and operated scheduled services between Liverpool and Brazil until 1914. In the First World War she was an armed merchant cruiser (AMC) until a u-boat sank her in the Atlantic Ocean in 1917.
SM UB-47 was a Type UB II submarine or U-boat for the German Imperial Navy during World War I. UB-47 was sold to the Austro-Hungarian Navy during the war. In Austro-Hungarian service the B was dropped from her name and she was known as SM U-47 or U-XLVII as a member of the Austro-Hungarian U-43 class.
SM UB-13 was a German Type UB I submarine or U-boat in the German Imperial Navy during World War I. The submarine was probably sunk by a British mine net in April 1916.
SS Tubantia was a Dutch-owned ocean liner that was launched in Scotland in 1914. She and her sister ship Gelria were the largest and swiftest ships in the Koninklijke Hollandsche Lloyd (KHL) fleet. They were also the first KHL ships to have quadruple-expansion steam engines.
The U-boat campaign from 1914 to 1918 was the World War I naval campaign fought by German U-boats against the trade routes of the Allies. It took place largely in the seas around the British Isles and in the Mediterranean. The German Empire relied on imports for food and domestic food production and the United Kingdom relied heavily on imports to feed its population, and both required raw materials to supply their war industry; the powers aimed, therefore, to blockade one another. The British had the Royal Navy which was superior in numbers and could operate on most of the world's oceans because of the British Empire, whereas the Imperial German Navy surface fleet was mainly restricted to the German Bight, and used commerce raiders and unrestricted submarine warfare to operate elsewhere.
SS Ancona was an ocean liner, built in 1908 by Workman, Clark and Company of Belfast for the Societa di Navigazione a Vapore Italia of Genoa. She was an emigrant ship on a route between Italy and the United States. SM U-38 sank her on 8 November 1915 off the coast of Tunisia.
The Atlantic U-boat campaign of World War I was the prolonged naval conflict between German submarines and the Allied navies in Atlantic waters—the seas around the British Isles, the North Sea and the coast of France.
SM U-21 was a U-boat built for the Imperial German Navy shortly before World War I. The third of four Type U-19-class submarines, these were the first U-boats in German service to be equipped with diesel engines. U-21 was built between 1911 and October 1913 at the Kaiserliche Werft in Danzig. She was armed with four torpedo tubes and a single deck gun; a second gun was added during her career.
SS Rochambeau was a French transatlantic ocean liner of the Compagnie Générale Transatlantique (CGT). She was launched in 1911 and scrapped in 1934. She was the first French ship to be powered by a combination of reciprocating steam engines and steam turbines.
SS Orteric was a Bank Line cargo and passenger steamship that was built in Scotland in 1910–11 and sunk by a U-boat in the Mediterranean Sea in 1915. In 1911 she took 960 Spanish and 565 Portuguese migrants to Hawaii to work on the sugar plantations.
SS Donegal was a Midland Railway passenger ferry that served in the First World War as an ambulance ship. She was completed in 1904 and sunk by enemy action in April 1917.
SS Verona was a transatlantic ocean liner that was built in Ireland in 1908 for an Italian shipping line. She was a troop ship in the Italo-Turkish War of 1911–12 and in the First World War in 1917–18. In 1918 a German submarine sank her in the Mediterranean with great loss of life.
SS Grampian was a transatlantic ocean liner that was built in Scotland in 1907 and scrapped in the Netherlands in 1925. She was operated originally by Allan Line, and later by Canadian Pacific Steamships. In the First World War she remained in commercial service but carried Canadian troops. In 1919 she survived a collision with an iceberg. In 1921 she was gutted by fire while being refitted. The refit was abandoned, and in 1925–26 she was scrapped.
RMS Orama was a UK steam ocean liner and Royal Mail Ship. She was launched in 1911 for the Orient Steam Navigation Company. When new, she was the largest liner sailing between Great Britain and Australia.
SS Caledonia was a British ocean liner that was built in Scotland in 1905 and converted into a troop ship in 1914. She was sunk by a German U-boat in the Mediterranean in 1916.
United Kingdom 
