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Jaskółka-class Minesweeper
The Jaskółka class was a class of six minesweepers of the Polish Navy built during the 1930s. They were the first sea-going warships of Polish production. The Jaskółka class was a versatile design which allowed the ships to serve in the role of either a minesweeper, small minelayer or a sub chaser. All were named after birds, therefore the class was nicknamed: ''ptaszki'' ( en, birdies). Design and building The first minesweepers in the Polish Navy were the German minesweepers of the FM type. These ships, built during the later part of World War I and bought by Poland during the early 20s, were already worn out by the 1930s so the Polish Navy required a replacement. The Modlin shipyard offered a design for the new class of minesweepers which was accepted. The first four ships of the class were built at Gdynia and Modlin. After they entered service they proved to be a good design so a further two were ordered in the mid 30s. Service World War II Post war Ships Refe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OORP Ptaszki
{{no footnotes, date=July 2014 The OrderOne MANET Routing Protocol is an algorithm for computers communicating by digital radio in a mesh network to find each other, and send messages to each other along a reasonably efficient path. It was designed for, and promoted as working with wireless mesh networks. OON's designers say it can handle thousands of nodes, where most other protocols handle less than a hundred. OON uses hierarchical algorithms to minimize the total amount of transmissions needed for routing. Routing overhead is limited to between 1% to 5% of node to node bandwidth in any network and does not grow as the network size grows. The basic idea is that a network organizes itself into a tree. Nodes meet at the root of the tree to establish an initial route. The route then moves away from the root by cutting corners, as ant-trails do. When there are no more corners to cut, a nearly optimum route exists. This route is continuously maintained. Each process can be perfor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Depth Charge
A depth charge is an anti-submarine warfare (ASW) weapon. It is intended to destroy a submarine by being dropped into the water nearby and detonating, subjecting the target to a powerful and destructive Shock factor, hydraulic shock. Most depth charges use explosive, high explosive charges and a fuze set to detonate the charge, typically at a specific depth. Depth charges can be dropped by ships, patrol aircraft, and helicopters. Depth charges were developed during World War I, and were one of the first viable methods of attacking a submarine underwater. They were widely used in World War I and World War II, and remained part of the anti-submarine arsenals of many navies during the Cold War, during which they were supplemented, and later largely replaced, by anti-submarine homing torpedoes. A depth charge fitted with a nuclear warhead is also known as a "nuclear depth bomb". These were designed to be dropped from a patrol plane or deployed by an anti-submarine missile from a s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minesweepers
A minesweeper is a small warship designed to remove or detonate naval mines. Using various mechanisms intended to counter the threat posed by naval mines, minesweepers keep waterways clear for safe shipping. History The earliest known usage of the naval mine dates to the Ming dynasty.Needham, Volume 5, Part 7, 203–205. Dedicated minesweepers, however, only appeared many centuries later during the Crimean War, where they were deployed by the British. The Crimean War minesweepers were rowboats trailing grapnels to snag mines. Minesweeping technology picked up in the Russo-Japanese War, using aging torpedo boats as minesweepers. In Britain, naval leaders recognized before the outbreak of World War I that the development of sea mines was a threat to the nation's shipping and began efforts to counter the threat. Sir Arthur Wilson noted the real threat of the time was blockade aided by mines and not invasion. The function of the fishing fleet's trawlers with their trawl gear was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minelayer
A minelayer is any warship, submarine or military aircraft deploying explosive mines. Since World War I the term "minelayer" refers specifically to a naval ship used for deploying naval mines. "Mine planting" was the term for installing controlled mines at predetermined positions in connection with coastal fortifications or harbor approaches that would be detonated by shore control when a ship was fixed as being within the mine's effective range. Before World War I, mine ships were termed mine planters generally. For example, in an address to the United States Navy ships of Mine Squadron One at Portland, England, Admiral Sims used the term “mine layer” while the introduction speaks of the men assembled from the “mine planters”. During and after that war the term "mine planter" became particularly associated with defensive coastal fortifications. The term "minelayer" was applied to vessels deploying both defensive- and offensive mine barrages and large scale sea mining. " ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sub Chaser
A submarine chaser or subchaser is a small naval vessel that is specifically intended for anti-submarine warfare. Many of the American submarine chasers used in World War I found their way to Allied nations by way of Lend-Lease in World War II. Submarine chaser variants U.S. Navy submarine chasers were designed specifically to destroy German submarines in World War I, and Japanese and German submarines in World War II. The small SC-1-class submarine chasers of the design used in World War I carried the hull designator SC (for Submarine Chaser). Their main weapon was the depth charge. They also carried machine guns and anti-aircraft guns. The similar-sized SC-497-class was built for World War II. Also in World War II, larger PC-461-class submarine chasers used the PC hull classification symbol (for Patrol, Coastal).Gardiner and Chesneau, pp. 71, 152-154 Class relationships: * 438 (98t, wooden hull) * 343 (450t, steel hull) * 68 (850t, steel hull) ** used in similar role a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mine Warfare Vessel Classes
Mine, mines, miners or mining may refer to: Extraction or digging *Miner, a person engaged in mining or digging *Mining, extraction of mineral resources from the ground through a mine Grammar *Mine, a first-person English possessive pronoun Military * Anti-tank mine, a land mine made for use against armored vehicles * Antipersonnel mine, a land mine targeting people walking around, either with explosives or poison gas * Bangalore mine, colloquial name for the Bangalore torpedo, a man-portable explosive device for clearing a path through wire obstacles and land mines * Cluster bomb, an aerial bomb which releases many small submunitions, which often act as mines * Land mine, explosive mines placed under or on the ground * Mining (military), digging under a fortified military position to penetrate its defenses * Naval mine, or sea mine, a mine at sea, either floating or on the sea bed, often dropped via parachute from aircraft, or otherwise lain by surface ships or submarines * Pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
