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PGM-1-class Motor Gunboat
The ''PGM-1''-class motor gunboats were a class of eight gunboats converted for the 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 ... from 1943 to 1944 and were succeeded by the s. All eight ''PGM-1''s were converted from s. The ''PGM-1''s were created to support PT boats in the Pacific, but were too slow to keep up. The ''PGM-1''s were discontinued and the ''PGM-9''s, also too slow, were shifted to support minesweeping ships instead. ''PGM-7'' was the only ''PGM-1''-class vessel lost in World War II. The others were sent to the Foreign Liquidation Commission in 1947. Their exact fate is unknown. SourcesINFORMATION ON WWII SCs {{PGM-1 class motor gunboat Gunboats of the United States Navy Gunboat classes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erie-class Gunboat
The ''Erie''-class gunboats were a class of gunboats built by the United States prior to World War II. The class was designed in 1932, and commissioned into the United States Navy in 1936: and . The ''Erie''s had a design speed of and a main armament of four guns in single mounts with four quadruple mount anti-aircraft guns. Development In 1930, during the London Naval Conference, Chief of Naval Operations Admiral William V. Pratt, successfully argued for an additional class of naval surface combatants that would not be limited in the number that could be constructed. They would be defined as a sloop, per Article VIII (b) of the Treaty. The new class of ships could not exceed of displacement, they would have a limit of maximum cruising speed, their armament would be limited to no more than four guns above in caliber, but not to exceed in caliber, and they could not mount any torpedo tubes. It was proposed that the ''Erie''s could be used in a large number of roles, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PGM-9-class Motor Gunboat
The ''PGM-9''-class motor gunboats were a class of 24 gunboats converted for the United States Navy from 1944-1945, succeeding the s. All 24 ''PGM-9''s were converted from s while still under construction. The ''PGM-9''s were created to support PT boats in the Pacific, but were too slow to keep up, and were shifted to support minesweeping Minesweeping is the practice of the removal of explosive naval mines, usually by a specially designed ship called a minesweeper using various measures to either capture or detonate the mines, but sometimes also with an aircraft made for that ... ships instead. Gunboats of the United States Navy Gunboat classes {{USN-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
3"/23-caliber Gun
The 3"/23 caliber gun (spoken "three-inch-twenty-three-caliber") was the standard anti-aircraft gun for United States destroyers through World War I and the 1920s. United States naval gun terminology indicates the gun fired a projectile 3 inches (76 mm) in diameter, and the barrel was 23 calibers long (barrel length is 3" x 23 = 69" or 1.75 meters.) Description The built-up gun with vertical sliding breech block weighed about 531 pounds (241 kg) and used fixed ammunition (case and projectile handled as a single assembled unit) with a 13-pound (6 kg) projectile at a velocity of 1650 feet per second (500 m/s).Campbell 1985 p.146 Range was 10100 yards (9235 meters) at 45 degrees elevation. Ceiling was 18000 feet (5500 meters) at the maximum elevation of 75 degrees.Campbell 1985 p.146 History The 3"/23 caliber cannon was the first purposely-designed anti-aircraft cannon to reach operational service in the US military, and was a further development of a 1 po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bofors 40 Mm Automatic Gun L/60
The Bofors 40 mm Automatic Gun L/60 (often referred to simply as the "Bofors 40 mm gun", the "Bofors gun" and the like, see name) is an anti-aircraft autocannon, designed in the 1930s by the Swedish arms manufacturer AB Bofors. The gun was designed as an intermediate anti-aircraft gun, filling the gap between fast firing close-range small calibre anti-aircraft guns and slower firing long-range high calibre anti-aircraft guns, a role which previously was filled by older outdated guns. The Bofors 40 mm L/60 was for its time perfectly suited for this role and outperformed competing designs in the years leading up to World War II in both effectiveness and reliability. It entered the export market around 1932 and was in service with 18 countries by 1939. Throughout World War II it became one of the most popular and widespread medium-weight anti-aircraft guns. It was used by the majority of the western Allies and some Axis powers such as Nazi Germany and Hungary. In th ... [...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 ... [...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 Re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PT Boats
A PT boat (short for patrol torpedo boat) was a motor torpedo boat used by the United States Navy in World War II. It was small, fast, and inexpensive to build, valued for its maneuverability and speed but hampered at the beginning of the war by ineffective torpedoes, limited armament, and comparatively fragile construction that limited some of the variants to coastal waters. In the USN they were organized in Motor Torpedo Boat Squadrons (MTBRONs). The PT boat was very different from the first generation of torpedo boat, which had been developed at the end of the 19th century and featured a Hull (watercraft)#Hull shapes, displacement hull form. These first generation torpedo boats rode low in the water, Displacement (ship), displaced up to 300 tons, and had a top speed of . During World War I Italy, the US, and UK developed the first high-performance gasoline-powered motor torpedo boats (often with top speeds over ) and corresponding torpedo tactics, but these projects were a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minesweeping
Minesweeping is the practice of the removal of explosive naval mines, usually by a specially designed ship called a minesweeper using various measures to either capture or detonate the mines, but sometimes also with an aircraft made for that purpose. Minesweeping has been practiced since the advent of naval mining in 1855 in the Crimean War. The first minesweepers date to that war and consisted of British rowboats trailing grapnels to snag the mines. By ship A sweep is either a contact sweep, a wire dragged through the water by one or two ships to cut the mooring wire of floating mines, or a distance sweep that mimics a ship to detonate the mines. The sweeps are dragged by minesweepers, either purpose-built military ships or converted trawlers. Each run covers between , and the ships must move slowly in a straight line, making them vulnerable to enemy fire. This was exploited by the Turkish army in the Battle of Gallipoli in 1915, when mobile howitzer batteries prevented ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gunboats Of The United States Navy
A gunboat is a naval watercraft designed for the express purpose of carrying one or more guns to bombard coastal targets, as opposed to those military craft designed for naval warfare, or for ferrying troops or supplies. History Pre-steam era In the age of sail, a gunboat was usually a small undecked vessel carrying a single smoothbore cannon in the bow, or just two or three such cannons. A gunboat could carry one or two masts or be oar-powered only, but the single-masted version of about length was most typical. Some types of gunboats carried two cannons, or else mounted a number of swivel guns on the railings. The small gunboat had advantages: if it only carried a single cannon, the boat could manoeuvre in shallow or restricted areas – such as rivers or lakes – where larger ships could sail only with difficulty. The gun that such boats carried could be quite heavy; a 32-pounder for instance. As such boats were cheap and quick to build, naval forces favoured swarm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
