An aircraft carrier is a warship that serves as a seagoing airbase, equipped with a full-length flight deck and facilities for carrying, arming, deploying, and recovering aircraft. Typically, it is the capital ship of a fleet, as it allows a naval force to project air power worldwide without depending on local bases for staging aircraft operations. Carriers have evolved since their inception in the early twentieth century from wooden vessels used to deploy balloons to nuclear-powered warships that carry numerous fighters, strike aircraft, helicopters, and other types of aircraft. While heavier aircraft such as fixed-wing gunships and bombers have been launched from aircraft carriers, these aircraft have not landed on a carrier. By its diplomatic and tactical power, its mobility, its autonomy and the variety of its means, the aircraft carrier is often the centerpiece of modern combat fleets. Tactically or even strategically, it replaced the battleship in the role of flagship of a fleet. One of its great advantages is that, by sailing in international waters, it does not interfere with any territorial sovereignty and thus obviates the need for overflight authorizations from third-party countries, reduces the times and transit distances of aircraft and therefore significantly increases the time of availability on the combat zone.
A midshipman is an officer of the lowest rank in the Royal Navy, United States Navy, and many Commonwealth navies. Commonwealth countries which use the rank include Canada, Australia, Bangladesh, Namibia, New Zealand, South Africa, India, Pakistan, Singapore, Sri Lanka, and Kenya.
In the United States Navy, officers have various ranks. Equivalency between services is by pay grade. United States Navy commissioned officer ranks have two distinct sets of rank insignia: On dress uniform a series of stripes similar to Commonwealth naval ranks are worn; on service khaki, working uniforms, and special uniform situations, the rank insignia are identical to the equivalent rank in the US Marine Corps.
The United States Maritime Commission was an independent executive agency of the U.S. federal government that was created by the Merchant Marine Act of 1936, which was passed by Congress on June 29, 1936, and was abolished on May 24, 1950. The commission replaced the United States Shipping Board which had existed since World War I. It was intended to formulate a merchant shipbuilding program to design and build five hundred modern merchant cargo ships to replace the World War I vintage vessels that comprised the bulk of the United States Merchant Marine, and to administer a subsidy system authorized by the Act to offset the cost differential between building in the U.S. and operating ships under the American flag. It also formed the United States Maritime Service for the training of seagoing ship's officers to man the new fleet.
The Gleaves-class destroyers were a class of 66 destroyers of the United States Navy built 1938–42, designed by Gibbs & Cox. The first ship of the class was USS Gleaves. They were the destroyer type that was in production for the US Navy when the United States entered World War II.
Type C2 ships were designed by the United States Maritime Commission (MARCOM) in 1937–38. They were all-purpose cargo ships with five holds, and U.S. shipyards built 328 of them from 1939 to 1945. Compared to ships built before 1939, the C2s were remarkable for their speed and fuel economy. Their design speed was 15.5 knots (28.7 km/h), but some could make 19 knots (35 km/h) on occasion. The first C2s were 459 feet (140 m) long, 63 feet (19 m) broad, and 40 feet (12 m) deep, with a 25-foot (8 m) draft. Later ships varied somewhat in size. Some, intended for specific trade routes, were built with significant modifications in length and capacity.
The United States Maritime Service (USMS) was established in 1938 under the provisions of the Merchant Marine Act of 1936 as voluntary training organization to train individuals to become officers and crewmembers on merchant ships that form the United States Merchant Marine per 46 U.S.C. § 51701. Heavily utilized during World War II, the USMS was largely dissolved in 1954, and its resources were absorbed into other federal departments. However, while the service is no longer structurally organized, remnants of the service still exist today and the service still actively commission officers to function as administrators and instructors at the United States Merchant Marine Academy and the state maritime academies.
German submarine U-51 was a Type VIIB U-boat of Nazi Germany's Kriegsmarine that operated during World War II. She was ordered on 21 November 1936 and laid down on 26 February 1937 in Kiel. She was launched on 11 June 1938 and commissioned on 6 August 1938.
USS Monadnock (ACM-10) was a coastal minelayer in the U.S. Navy, the third vessel named after Mount Monadnock, a solitary mountain (monadnock) of more than 3,100 feet in southern New Hampshire close to the border of Massachusetts. The ship was built as the cargo vessel Cavalier for the Philadelphia and Norfolk Steamship Company by Pusey and Jones Corporation, Wilmington, Delaware in 1938. The Navy purchased the ship 9 June 1941 for wartime use. After decommissioning the ship was sold in June 1947 for commercial use then sold to a Panamanian company in 1949 to be renamed Karukara. In 1952 the ship became Monte de la Esperanza for a company in Bilbao, Spain transporting bananas to the United Kingdom from the Canary Islands for more than 20 years. She was later sold to the Marine Institute of Spain for operation as a hospital ship for more than 10 years serving the fishing fleet of the Canary Islands as Esperanza del Mar until becoming an artificial reef off Spain in 2000.
USS Miantonomah (CM-10/CMc-5) was built as SS Quaker by Pusey & Jones Corporation, Wilmington, Delaware in 1938 as a commercial coastwise ship operating as a fast inland water passenger and freight carrier. Quaker was acquired by the Navy in May 1941 for conversion to a coastal minelayer. Miantonomah operated off the east coast of the United States, Africa and the Mediterranean and took part in the invasion of Europe in 1944. The ship was sunk by a mine 25 September 1944.
SS Scharnhorst was a Norddeutscher Lloyd ocean liner, launched in 1934, completed in 1935 and made her maiden voyage on 8 May 1935. She was the first big passenger liner built by the Third Reich. Under the German merchant flag, she was the second liner named after General Gerhard J. D. von Scharnhorst. She was one of three ships on the Far Eastern route between Bremen and Yokohama; her sister ships were Potsdam and Gneisenau. These three ships were planned to shorten the journey time between Bremen and Shanghai from the usual 50 days to 34. She was trapped in Japan in September 1939 and later converted into an Imperial Japanese Navy aircraft carrier named Shin'yō in 1942 and sunk by the US submarine USS Spadefish in 1944.
Master's mate is an obsolete rating which was used by the Royal Navy, United States Navy and merchant services in both countries for a senior petty officer who assisted the master. Master's mates evolved into the modern rank of sub-lieutenant in the Royal Navy, while in the merchant service they evolved into the numbered mates or officers.
HMS Whitley (L23), ex-Whitby, was a W-class destroyer of the British Royal Navy that saw service in the British campaign in the Baltic Sea against Bolshevik forces during the Russian Civil War and in the early months of World War II.
The first HMS Walrus (D24) was a W-class destroyer of the British Royal Navy that saw service in the final months of World War I.
HMS Teviot Bank was a Bank Line steamship that was built in England in 1938 as the cargo ship Teviotbank. In the Second World War she was a Royal Navy auxiliary minelayer. By 1956 a Panamanian company had bought her and renamed her Nella. She was scrapped in Italy in 1971.
Kriegsmarine 
French Navy