Cause of sinking ROKS Cheonan

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on 25 april 2010, south korea s defense minister, kim tae-young, said cause of explosion sank cheonan torpedo; statements first time south korean official publicly cited such cause. kim said bubble jet caused heavy torpedo thought thing blamed, various other possibilities under review. bubble jet caused underwater explosion changes pressure of water, , force can cause ship break apart. bubble jet theory supported 1 of investigators incident, had said there no evidence explosion had occurred in contact ship, , non-contact explosion had broken ship in half.


on 20 may 2010, south korean-led international commission investigating sinking of cheonan presented findings, stating ship sunk north korean torpedo attack. torpedo parts recovered @ site of explosion dredging ship on 15 may, include 5x5 bladed contra-rotating propellers, propulsion motor , steering section, claimed match schematics of cht-02d torpedo included in introductory brochures provided foreign countries north korea export purposes. markings in hangul, read 1번 (or no. 1 in english), found inside end of propulsion section said have been consistent markings on obtained north korean torpedo. however, (the hankyoreh) have pointed out without proper reason in north, 호 (pronounced ho ) used rather 번 ; , north korean torpedo found 7 years ago bears marking 4호 . russian , chinese torpedoes marked in respective languages. cht-02d torpedo manufactured north korea utilizes acoustic/wake homing , passive acoustic tracking methods. however, expert @ south korean missile manufacturer disagreed idea submarine alleged rok authorities have shot torpedo has capability: sango class submarines known used north korean commandos in infiltrating areas or laying mines, apparently not have advanced system guide homing weapons. if smaller class submarine involved, there bigger question mark.


one member of investigative team, shin sang-cheol, summoned on charges of spreading unsubstantiated rumors, publicly expressed doubts saying magnified photo of evidence showed marking written on rusted surface. if north marked it, marking should have been written on smooth surface. ministry of defense had earlier tried remove shin investigative team, saying not qualified work part of investigation team, has been spreading malicious rumors, lacks expertise , has been insincere in participation in probe.


on 13 september 2010, final report issued jig concluded that, cheonan split , sunk due shockwave , bubble effect generated underwater explosion of torpedo. detonation location 3 meters port center of gas turbine room , @ depth of 6-9 meters...


north korea denied responsible sinking. china dismissed official scenario presented south korea , united states not credible. investigation russian navy did not concur report. on 9 july 2010, united nations security council made presidential statement condemning attack without identifying attacker.








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