|
Naval Mine
A naval mine is a self-contained explosive device placed in water to damage or destroy surface ships or submarines. Unlike depth charges, mines are deposited and left to wait until they are triggered by the approach of, or contact with, any vessel or a particular vessel type, akin to anti-infantry vs. anti-vehicle mines. Naval mines can be used offensively, to hamper enemy shipping movements or lock vessels into a harbour; or defensively, to protect friendly vessels and create "safe" zones. Mines allow the minelaying force commander to concentrate warships or defensive assets in mine-free areas giving the adversary three choices: undertake an expensive and time-consuming minesweeping effort, accept the casualties of challenging the minefield, or use the unmined waters where the greatest concentration of enemy firepower will be encountered. Although international law requires signatory nations to declare mined areas, precise locations remain secret; and non-complying individ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mina Morska Typu M 1908-39
Mina may refer to: Places Iran * Minaq, East Azerbaijan * Mina, Fars * Mineh, Lorestan Province * Mina, Razavi Khorasan * Mehneh, Razavi Khorasan Province United States * Mina, California * Mina, Nevada * Mina, New York * Mina, Ohio * Mina, South Dakota Ports * Al-Mina, a modern name given to an ancient coast settlement in Syria * El Mina, Lebanon, the original site of the harbor of the Phoenician city of Tripoli Elsewhere * Elmina, Ghana, a modern town which grew around the first European settlement in sub-Saharan Africa * Mina 3, Santa Cruz Province, Argentina * Mina, Burkina Faso, village in Balé Province, Burkina Faso * Mina, Iloilo, a municipality in Iloilo, Philippines * Mina, Nuevo León, a municipality in Nuevo León, Mexico * Mina, Saudi Arabia * Mina River (Indonesia) * Abu Dhabi Vegetable Market or Al Mina Fruit & Vegetable Market, Abu Dhabi, United Arab Emirates Languages * Hina language, a language of Cameroon * Gen language or Mina, the language ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rocket
A rocket (from it, rocchetto, , bobbin/spool) is a vehicle that uses jet propulsion to accelerate without using the surrounding air. A rocket engine produces thrust by reaction to exhaust expelled at high speed. Rocket engines work entirely from propellant carried within the vehicle; therefore a rocket can fly in the vacuum of space. Rockets work more efficiently in a vacuum and incur a loss of thrust due to the opposing pressure of the atmosphere. Multistage rockets are capable of attaining escape velocity from Earth and therefore can achieve unlimited maximum altitude. Compared with airbreathing engines, rockets are lightweight and powerful and capable of generating large accelerations. To control their flight, rockets rely on momentum, airfoils, auxiliary reaction engines, gimballed thrust, momentum wheels, deflection of the exhaust stream, propellant flow, spin, or gravity. Rockets for military and recreational uses date back to at least 13th-century China. Signific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
