What is mines: Definition and 11 Discussions

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 individuals may not disclose minelaying. While mines threaten only those who choose to traverse waters that may be mined, the possibility of activating a mine is a powerful disincentive to shipping. In the absence of effective measures to limit each mine's lifespan, the hazard to shipping can remain long after the war in which the mines were laid is over. Unless detonated by a parallel time fuze at the end of their useful life, naval mines need to be found and dismantled after the end of hostilities; an often prolonged, costly, and hazardous task.
Modern mines containing high explosives detonated by complex electronic fuze mechanisms are much more effective than early gunpowder mines requiring physical ignition. Mines may be placed by aircraft, ships, submarines, or individual swimmers and boatmen. 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. There are also mines that release a homing torpedo rather than explode themselves.

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  1. Antitank_Borshch

    Help me come up with shock effect preventing technology (sci-fi book)

    There is a problem in my technological concept that does not allow the normal development of the plot of the book. It takes place on an ocean planet where being above sea level is absolutely dangerous with the level of technology that exists there. So all combat operations there take place...
  2. S

    Store wood in old salt mines to reduce CO2 in the atmosphere

    If trees are cut and then burned they have not reduced the CO2 in the atmosphere at all. And if they are left in the forest and then rot 90% of their mass also go back into the atmosphere. Here in Germany we have many old salt mines. I wonder if it would be a good idea to cut trees and store...
  3. K

    B Probability of Mine in Block E at Crossroads AB & CD

    I thought of this problem: The roads AB and CD have block E in common. There are 6 blocks in road AB and 13 blocks in road CD. Someone has planted a mine in some of the blocks. He gives us this information: 1. There's only one mine in road AB in one of its blocks. 2. There's only one mine...
  4. ferchotous

    Applying pressure for clearing land mines

    Hi, I am a Industrial Design student working on my senior Thesis. Since antipersonal landmine cleareance is a very dangerous process; I am working on a remote controlled vehicle concept that will be able to do a controlled detonation. That way the human won't have to manually disarm the landmine...
  5. C

    Elephants learnt to avoid land mines

    http://www.economist.com/news/middle-east-and-africa/21657800-some-elephants-appear-have-learned-avoid-landmines-whiff-danger Smart animals.
  6. L

    Aerospace Engineering at CU Boulder or Mech E. at Colorado School of Mines

    Hello everyone, I was wondering if anyone had any advice. I have the opportunity to study at either Colorado School of Mines for MECH Eng. or at CU Boulder for Aerospace Eng. I wish to work in engine design at NASA or Space X or really anywhere eventually. So I was wondering if anyone had any...
  7. G

    As we have so many oil mines around the world, how large are these

    As we have so many oil mines around the world, how large are these holes left behind, and what is put in place of the oil that is taken out. wouldn't the pressure be different? and what would happen if a oil cavern collapsed?
  8. Wellesley

    Discover the Top-Ranked Engineering Programs at Colorado School of Mines

    I'm heading out to CSM for the fall semester, and I'm wondering if anyone knows anything about the school. I've done some research and I know the "party line", but I'd really like to hear what people on PF think about the school, or it's reputation. I'm planning to go into either Chemical or...
  9. I

    Any Opinion on South Dakota School of Mines?

    I'm planning to transfer to a university soon, and as of now I'm pretty much dead set on studying at Colorado School of Mines. The reason why I'm asking about South Dakota School of Mines is because the cost of attendance is very, very, attractive: $14K a year for out of state students. The...
  10. E

    For all the mechanical engineers whom had working experience in mines, oil rigs

    Hi guys, i am about to graduate from my mechanical engineering degree, i am thinking of going into the mining industries, becoming an on-site engineer. People have been telling me that it's a job that pays VERY WELL, but the downfall is that you will have to be on the site for 6 months every...
  11. Amith2006

    How does the pressure vary as we go deep into the mines

    Sir, How does the pressure vary as we go deep into the mines and as move up into the atmosphere? I think as we move up into the atmosphere the pressure decreases. I am not sure.