The u. s. and south korea will conduct a major antisubmarine training exercise starting sunday , the defense chiefs of the two countries said tuesday , as part of their response to the sinking of a south korean ship earlier this year .

美国和韩国的国防部长周二说，两国将于周日开始大规模反潜艇军事演习，作为对今年早些时候一艘韩国军舰沉没的回应的一部分。

Officials said the focus of the attack appeared to be a hangar housing american-made p-3 orion aircraft , which are used for maritime surveillance and antisubmarine operations .

官员说，袭击重点似乎是存放美国p-3“猎户座”（orion）巡逻机的飞机库，该飞机的主要用途是海上侦察和反潜作战。