An armed merchantman is a merchant ship equipped with guns, usually for defensive purposes, either by design or after the fact. In the days of sail, piracy and privateers, many merchantmen would be routinely armed, especially those engaging in long distance and high value trade. In more modern times, auxiliary cruisers were used offensively as merchant raiders to disrupt trade chiefly during both World War I and World War II, particularly by Germany.
HMAS Kanimbla was a passenger ship converted for use as an armed merchant cruiser and landing ship infantry during World War II. Built during the mid-1930s as the passenger liner MV Kanimbla for McIlwraith, McEacharn & Co, the ship operated in Australian waters until 1939, when she was requisitioned for military service, converted into an armed merchant cruiser, and commissioned in the Royal Navy as HMS Kanimbla.
HMS Rawalpindi was a British armed merchant cruiser that was sunk in a surface action against the German battleships Scharnhorst and Gneisenau during the first months of the Second World War. Her captain was Edward Kennedy.
SS Cap Trafalgar was a German ocean liner launched in 1913 for the Hamburg Süd line. In 1914, she was converted for use as an auxiliary cruiser during World War I. She was the first armed merchant cruiser sunk by a ship of the same class; she was destroyed by HMS Carmania, also a converted ocean liner, in a furious action in the South Atlantic on 14 September 1914. It was the world's first battle between former ocean liners.
SS Rajputana was a British passenger and cargo carrying ocean liner. She was built for the Peninsular & Oriental Steam Navigation Company at the Harland and Wolff shipyard at Greenock on the lower River Clyde, Scotland in 1925. She was one of the P&O R-class liners from 1925 that had much of their interiors designed by Lord Inchcape's daughter Elsie Mackay. Named after the Rajputana region of western India, she sailed on a regular route between England and British India.
RMS Carmania was a Cunard Line transatlantic steam turbine ocean liner. She was launched in 1905 and scrapped in 1932. In World War I she was first an armed merchant cruiser (AMC) and then a troop ship.
HMS Salmon was a second-batch S-class submarine built during the 1930s for the Royal Navy. Completed in 1935, the boat fought in the Second World War. Salmon is one of twelve boats named in the song "Twelve Little S-Boats".
RMS Mooltan was an ocean liner and Royal Mail Ship of the Peninsular and Oriental Steam Navigation Company (P&O). She was ordered in 1918 and completed in 1923. She served in the Second World War first as the armed merchant cruiser HMS Mooltan (F75) and then as a troop ship. She was retired from P&O service in 1953 and scrapped in 1954.
RMS Maloja was a British ocean liner that saw service from 1923 to 1954.
RMS Moldavia was a British passenger steamship of the early 20th century. She served as the Royal Navy armed merchant cruiser HMS Moldavia during World War I until sunk by an Imperial German Navy submarine in 1918.
Bremen was a blockade-breaking German merchant submarine of World War I. Developed with private funds and operated by the Norddeutscher Lloyd Line, she was one of the first of seven U-151-class U-boats built and one of only two used as unarmed cargo submarines.
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, largely in the seas around the British Isles and in the Mediterranean, as part of a mutual blockade between the German Empire and the United Kingdom.
SS India was a steam passenger liner operated by the Peninsular and Oriental Steam Navigation Company (P&O) between 1896 and 1915.
RMS Corfu was a Royal Mail Ship and ocean liner operated by the Peninsular and Oriental Steam Navigation Company. Known as one of the 'Far East Sisters', she was launched in 1931 to serve the company's India and Far East Mail Service, along with her sister ship, the RMS Carthage. Both ships were built by Alexander Stephen & Sons Ltd in Glasgow, Scotland and served from 1931 until 1961 when they were scrapped in Japan.
An armed boarding steamer was a merchantman that the British Royal Navy converted to a warship during the First World War. AB steamers or vessels had the role of enforcing wartime blockades by intercepting and boarding foreign vessels. The boarding party would inspect the foreign ship to determine whether to detain the ship and send it into port or permit it to go on its way.
The SS Ranpura was a British passenger and cargo carrying ocean liner built by R. & W. Hawthorn Leslie and Company at Newcastle upon Tyne for the Peninsular & Oriental Steam Navigation Company in 1924. She was the first of the P&O 'R' class liners that had much of their interiors designed by Lord Inchcape's daughter Elsie Mackay. She was launched 13 September 1924 and sponsored by C.C. Straker, wife of the chairman of Hawthorn Leslie and Company.
HMS Ambrose was a steamship that was built for in 1903 as a passenger liner. The Booth Steam Ship Company ran her scheduled on services between Liverpool and Brazil until the First World War.
Lützow was the tenth ship of the German Feldherren-Klasse of passenger ships. She was launched in 1907, seized by the British in 1914, renamed to Huntsend, and eventually scrapped in 1932.
The second HMS Wivern, was a Modified W-class destroyer of the British Royal Navy that saw service in World War II.
RMS Otranto was an ocean liner that was built for the Orient Steam Navigation Company in 1925. The "RMS" prefix stands for Royal Mail Ship, as she carried overseas mail under a contract between Orient Line and Royal Mail. Otranto was in service until 1957, when she was sold for scrap.
United Kingdom