Sea of Mines.

Tubes above mine called Hertz horns , are part of the detonation mechanism .
Sea mines are explosive device placed in water to destroy ships or submarines . Unlike explosives , placed sea mines and wait until triggered to be blown up by enemy ships approaching . Sea mines can be used offensively by placing it near enemy ships or lock it in a port , or defensively to make some sort of safe area to protect ships friends .
Sea mines can be deployed from ships , submarines , aircraft or individually from the port . The price of a sea mine varies from cheap revolves around a thousand dollars to a sophisticated type which cost millions of dollars that comes with a number of sensors and can shoot warheads with rocket or torpedo .

Flexibility and the cost factors make sea mines a favorite weapon in a war that is not balanced . Production and distribution costs generally range between 10 % and 0.5 % of the cost for its removal . Some minefields former World War II still exist due to too broad an area spreading and high costs for safekeeping - and theoretically some sea mines can remain active for hundreds of years .
International law requires each state to announce when they are going to put mine in a region in order to avoid civilian ships that area . The warning does not have to detail ; during World War II, the United Kingdom said they had cast mines in the English Channel , North Sea and the beaches in France .

Minesweeper .

Minesweeper is a small sea warship designed to counter the threat posed by naval mines . Minesweeper generally detect then neutralize mines before other marine operations . Minesweeper with goals and tasks in particular started to be built during the first World War I , with the advent of class minesweeper Flower ( Flower - class minesweeping sloop ) .

Operations and requirements .

Minesweepers equipped with a " mechanical sweeper " ( mechanical sweeper ) or " sweeper influencers " ( influence sweeper ) to make the mines explode . Modern minesweeper is designed to reduce the possibility of the passage of the ship would blow up the mine itself. He built soundproof to reduce the acoustic trace , and bilge are often constructed using wood , glass reinforced plastic ( glass-reinforced plastic or GRP ) , ferrous metal , or through a process of magnetic footprint reduction ( degaussed ) .
Mechanical sweeper is a tool designed to cut the tether cable on the seabed mines, and wherever possible to help move signaled the determination of the location and subsequent neutralization . The tool is pulled behind the sweeper minesweeper , and use a crane ( eg Oropesa , paravane ) to maintain the depth and position desired sweeping . Influencers Sweeper is a tool that mimicked an acoustic or mechanical trace a particular kind of vessel , causing the mine to explode . These tools are often also in tow , and generally in the form of magnetic or acoustic generator .
There are two modes to operate the sweeper influencers : MSM ( mine setting mode , the mode setting mine ) and TSM (target setting mode / target simulation mode , the mode setting / simulating the target ) . MSM sweeping is based on the knowledge of certain types of mines , and produces output that is required for the mine detonates . If the knowledge is not there , then the TSM reproduce the effect of traces of hostile ships that will transit through the area that will be passed. TSM thus clearing mines directed at the ship even without knowledge of the use of mines . However , mines directed at other types of ships may remain active .
Minesweeper differs from mine hunter ships ; actively detect and neutralize mines.
In many cases , minesweepers into mine hunters complement to ship ; although it remains dependent on the operations and operating environment . A minesweeper is typically more suitable for cleaning open water area , with a large number of mines . Both types of ships are collectively called mine countermeasures vessel ( MCMV or mine countermeasures vessel ) , a term also applied to a vessel that has a combination of both roles . HMS Wilton was the first ship of this type , as well as the first warship constructed from glass reinforced plastic ( GRP ) .

Famous minesweeper .

HNLMS Abraham Crijnssen - famous for escape from Surabaya in 1942 disguised as a tropical island .
HMS Bronington - formerly led by Prince Charles , Prince of Wales
Calypso - research vessel of Jacques - Yves Cousteau owned ; former British Navy ship classes BYMS J826
USS Hazard - museum ship at Omaha , Nebraska
HMS Wilton - the ship 's first combined MCMV and the first warship constructed from GRP

Vickers Wellington DWI L4374 .

The Vickers Wellington was called on to carry out many tasks versatile in its existence , but probably none more unusual that the DWI Carried roomates that designation . This Stood for Directional Wireless Installation , which was intentionally misleading ; the role of these converted Wellington Mk Is was to find and explode the German magnetic mines that were a a considerable danger to Allied shipping from the outset of World War II .
The first DWI Wellington Mk I , P2518 , was flown in December , 1939, having its turrets replaced by fairings and carrying a 48ft diameter circular coil made ​​from aluminum alloy strip . This was energized by a current generated by an internally mounted Ford V8 car engine , and when successful the caused the mine to explode after the aircraft had overflown it . P5218 was issued to No.l GRU ( General Reconnaissance Unit ) and Carried out its first successful operation from Manston on 8 January 1940. Three further DWI Wellington Mk I conversions ( Vickers type 418 ) were Carried out , and all four were later upgraded to Mk II standard DWI Wellington (type 419 ) with the installation of a DH Gypsy Six engines generating capacity to provide more . Generally sweeps were Carried out by a formation of three DWI aircraft , and on 10 May 1940 this technique was used to enable a safe naval evacuation by the Dutch Royal family . Shortly after this No.l GRU was posted to the Middle East . No.l GRU based at Ismalia were there , with their operations Carried out over the harbor of Alexandria , and the Suez Canal in particular , as the Allied armies and advances along the coast the Harbours of Tobruk and Benghazi . At least eleven further conversions to Wellington DWI Mk II standards were made ​​, one of these being L4374 , built at Weybridge in July 1939 as a Mk I. Others were converted in the field in the Middle East. So, thank you for reading this article.  Written and posted by Bambang Sunarno. sunarnobambang86@gmail.com
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DatePublished: March 25, 2014 at 16:25

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Tag : Sea of Mines.