stˈeɪʃənz hˈaɪpoʊ ænd kˈæst wɜːɹ ɐsˈaɪnd ɹᵻspˌɑːnsəbˈɪlᵻɾi fɔːɹ wˈɜːk ˌɔn dʒˌæpənˈiːz nˈeɪvi sˈɪstəmz, ænd ˈæftɚ ðɪ ɐɡɹˈiːmənt wɪððə juːnˈaɪɾᵻd kˈɪŋdəm ænd nˈɛðɜːləndz tə ʃˈɛɹ ðɪ ˈɛfɚt, wˈɜːkt wɪð kɹˈɪptoʊ ɡɹˈuːps ɪn hˈɑːŋ kˈɑːŋ ðˈɛn sˈɪŋɡɐpˌoːɹ fˈɑːɹ ˈiːst kəmbˈaɪnd bjˈʊɹɹoʊ ænd bætˈeɪviə kˈeɪmɚ fˈoːɹtiːn ɔːɹ ɹˈuːm fˈoːɹtiːn.
Stations HYPO and CAST were assigned responsibility for work on Japanese Navy systems, and after the agreement with the United Kingdom and Netherlands to share the effort, worked with crypto groups in Hong Kong then Singapore (Far East Combined Bureau) and Batavia (Kamer 14 or Room 14).