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USS Achigan (YT-218)
USS ''Achigan'' (YT/YTB-218) was a ''Cahto''-class large harbor tug in the service of the United States Navy. A French-Canadian rendering of the word ashigan which, in Chippewa and Algonquian dialects, is the name of the smallmouth bass. Construction ''Achigan'' (YT-218) was laid down on 23 July 1943, at Ipswich, Massachusetts, by W. A. Robinson, Inc.; reclassified a large harbor tug YTB-218 on 15 May 1944; launched on 4 October 1944; and placed in service on 9 January 1945. Service history Assigned to the 4th Naval District, ''Achigan'' spent most of her naval career at the Philadelphia Naval Shipyard The Philadelphia Naval Shipyard was an important naval shipyard of the United States for almost two centuries. Philadelphia's original navy yard, begun in 1776 on Front Street and Federal Street in what is now the Pennsport section of the cit .... On the afternoon of 8 January 1946, she sank at Philadelphia, as a result of a collision with . Later salvaged, the tug retu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Algonquian Languages
The Algonquian languages ( or ; also Algonkian) are a subfamily of Indigenous languages of the Americas, indigenous American languages that include most languages in the Algic languages, Algic language family. The name of the Algonquian language family is distinguished from the orthographically similar Algonquin language, Algonquin dialect of the Indigenous Ojibwe language (Chippewa), which is a senior member of the Algonquian language family. The term ''Algonquin'' has been suggested to derive from the Maliseet word (), "they are our relatives/allies". A number of Algonquian languages are considered extinct languages by the modern linguistic definition. Algonquian peoples, Speakers of Algonquian languages stretch from the east coast of North America to the Rocky Mountains. The proto-language from which all of the languages of the family descend, Proto-Algonquian language, Proto-Algonquian, was spoken around 2,500 to 3,000 years ago. There is no scholarly consensus about wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Navy
The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage of its active battle fleet alone exceeding the next 13 navies combined, including 11 allies or partner nations of the United States as of 2015. It has the highest combined battle fleet tonnage (4,635,628 tonnes as of 2019) and the world's largest aircraft carrier fleet, with eleven in service, two new carriers under construction, and five other carriers planned. With 336,978 personnel on active duty and 101,583 in the Ready Reserve, the United States Navy is the third largest of the United States military service branches in terms of personnel. It has 290 deployable combat vessels and more than 2,623 operational aircraft . The United States Navy traces its origins to the Continental Navy, which was established during the American Revo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tugs Of The United States Navy
A tugboat or tug is a marine vessel that manoeuvres other vessels by pushing or pulling them, with direct contact or a tow line. These boats typically tug ships in circumstances where they cannot or should not move under their own power, such as in crowded harbour or narrow canals, or cannot move at all, such as barges, disabled ships, log rafts, or oil platforms. Some are ocean-going, some are icebreakers or salvage tugs. Early models were powered by steam engines, long ago superseded by diesel engines. Many have deluge gun water jets, which help in firefighting, especially in harbours. Types Seagoing Seagoing tugs (deep-sea tugs or ocean tugboats) fall into four basic categories: #The standard seagoing tug with model bow that tows almost exclusively by way of a wire cable. In some rare cases, such as some USN fleet tugs, a synthetic rope hawser may be used for the tow in the belief that the line can be pulled aboard a disabled ship by the crew owing to its lightness comp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naval History And Heritage Command
The Naval History and Heritage Command, formerly the Naval Historical Center, is an Echelon II command responsible for the preservation, analysis, and dissemination of U.S. naval history and heritage located at the historic Washington Navy Yard. The NHHC is composed of 42 facilities in 13 geographic locations including the Navy Department Library, 10 museums and 1 heritage center, USS ''Constitution'' repair facility and detachment, and historic ship ex-USS ''Nautilus''. Command history The Naval History and Heritage Command traces its lineage to 1800, when President John Adams requested Benjamin Stoddert, the first Secretary of the Navy, prepare a catalog of professional books for use in the Secretary's office. When the British invaded Washington in 1814, this collection, containing the finest works on naval history from America and abroad, was rushed to safety outside the Federal City. After that, the library had many locations, including a specially designed space in the S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
6th Naval District
The naval district was a U.S. Navy military and administrative command ashore. Apart from Naval District Washington, the Districts were disestablished and renamed Navy Regions about 1999, and are now under Commander, Naval Installations Command (CNIC). They were established for the purpose of decentralizing the Navy Department's functions with respect to the control of the coastwise sea communications and the shore activities outside the department proper, and for the further purpose of centralizing under one command: : (a) For military coordination, all naval activities, and : (b) For administrative coordination, all naval activities with specific exceptions, within the district and the waters thereof. The limits of the naval districts are laid down in article 1480, Navy Regulations. Those limits extend to seaward so far as to include the coastwise sea lanes (art. 1486 (1), Navy Regulations). "Each naval district shall be commanded by a designated commandant, who is the dir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philadelphia Naval Shipyard
The Philadelphia Naval Shipyard was an important naval shipyard of the United States for almost two centuries. Philadelphia's original navy yard, begun in 1776 on Front Street and Federal Street in what is now the Pennsport section of the city, was the first naval shipyard of the United States. It was replaced by a new, much larger yard developed around facilities begun in 1871 on League Island, at the confluence of the Delaware and Schuylkill rivers. The Navy Yard expansion stimulated the development over time of residential and businesses in South Philadelphia, where many shipyard workers lived. During World War II, some 40,000 workers operated on shifts around the clock to produce and repair ships at the yard for the war effort. The United States Navy ended most of its activities there in the 1990s, closing its base after recommendations by the Base Realignment and Closure commission. In 2000, the Philadelphia Industrial Development Corporation, on behalf of the city of Ph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
4th Naval District
The naval district was a U.S. Navy military and administrative command ashore. Apart from Naval District Washington, the Districts were disestablished and renamed Navy Regions about 1999, and are now under Commander, Naval Installations Command (CNIC). They were established for the purpose of decentralizing the Navy Department's functions with respect to the control of the coastwise sea communications and the shore activities outside the department proper, and for the further purpose of centralizing under one command: : (a) For military coordination, all naval activities, and : (b) For administrative coordination, all naval activities with specific exceptions, within the district and the waters thereof. The limits of the naval districts are laid down in article 1480, Navy Regulations. Those limits extend to seaward so far as to include the coastwise sea lanes (art. 1486 (1), Navy Regulations). "Each naval district shall be commanded by a designated commandant, who is the dir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Machine Gun
A machine gun is a fully automatic, rifled autoloading firearm designed for sustained direct fire with rifle cartridges. Other automatic firearms such as automatic shotguns and automatic rifles (including assault rifles and battle rifles) are typically designed more for firing short bursts rather than continuous firepower, and are not considered true machine guns. As a class of military kinetic projectile weapon, machine guns are designed to be mainly used as infantry support weapons and generally used when attached to a bipod or tripod, a fixed mount or a heavy weapons platform for stability against recoils. Many machine guns also use belt feeding and open bolt operation, features not normally found on other infantry firearms. Machine guns can be further categorized as light machine guns, medium machine guns, heavy machine guns, general purpose machine guns and squad automatic weapons. Similar automatic firearms of caliber or more are classified as autocannons, rat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M2 Browning
The M2 machine gun or Browning .50 caliber machine gun (informally, "Ma Deuce") is a heavy machine gun that was designed towards the end of World War I by John Browning. Its design is similar to Browning's earlier M1919 Browning machine gun, which was chambered for the .30-06 cartridge. The M2 uses Browning's larger and more powerful .50 BMG (12.7 mm) cartridge. The design has had many designations; the official U.S. military designation for the current infantry type is Browning Machine Gun, Cal. .50, M2, HB, Flexible. It is effective against infantry, unarmored or lightly armored vehicles and boats, light fortifications, and low-flying aircraft. The gun has been used extensively as a vehicle weapon and for aircraft armament by the United States since the 1930s. It was heavily used during World War II, the Korean War, the Vietnam War, the Falklands War, the Soviet–Afghan War, the Gulf War, the Iraq War, and the War in Afghanistan. It is the primary heavy machine gun of NATO ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Propeller
A propeller (colloquially often called a screw if on a ship or an airscrew if on an aircraft) is a device with a rotating hub and radiating blades that are set at a pitch to form a helical spiral which, when rotated, exerts linear thrust upon a working fluid such as water or air. Propellers are used to pump fluid through a pipe or duct, or to create thrust to propel a boat through water or an aircraft through air. The blades are specially shaped so that their rotational motion through the fluid causes a pressure difference between the two surfaces of the blade by Bernoulli's principle which exerts force on the fluid. Most marine propellers are screw propellers with helical blades rotating on a propeller shaft (ship), propeller shaft with an approximately horizontal axis. History Early developments The principle employed in using a screw propeller is derived from sculling. In sculling, a single blade is moved through an arc, from side to side taking care to keep presenting the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
