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Challenger-class submarine : ウィキペディア英語版 | Challenger-class submarine
The ''Challenger'' class is one of the submarine classes of the Singapore Navy. They are extensively modernized versions of ex-''Sjöormen'' class submarines. Challenger and Centurion were retired in 2015.〔http://www.mindef.gov.sg/imindef/press_room/official_releases/nr/2015/mar/11mar15_nr.html#.VQGrI_yZcrU〕 ==History== In 1995, the RSN acquired a ''Challenger'' class (formerly known as ''Sjöormen'' class) submarine from the Swedish Navy and another three in 1997, making them Singapore's first underwater platforms.〔(【引用サイトリンク】 work=Ministry of Defence Singapore )〕 It is believed that the ''Challenger'' class were purchased to develop the required submarine operations expertise before selecting a modern class of submarines to replace them, since all the boats are over 40 years old.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Challenger-class submarine」の詳細全文を読む
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