Prior to the war, CAST was the US Navy's Far East cryptographic operation, under the OP-20-G Naval Intelligence section in Washington.
pɹˈaɪɚ tə ðə wˈɔːɹ, kˈæst wʌzðə jˌuːˈɛs nˈeɪviz fˈɑːɹ ˈiːst kɹˌɪptəɡɹˈæfɪk ˌɑːpɚɹˈeɪʃən, ˌʌndɚ ðɪ ˌoʊpˈiː twˈɛntidʒˈiː nˈeɪvəl ɪntˈɛlɪdʒəns sˈɛkʃən ɪn wˈɑːʃɪŋtən.