tə dɪtˈɛkt sˈʌbmɚɹˌiːnz, ðɪ æɡˈɑːnoʊz wɜːɹ ɪkwˈɪpt wɪð ɐ tˈaɪp nˈaɪnti θɹˈiː mˈɑːdəl tˈuː hˈaɪdɹəfˌoʊn ˌɪnstəlˈeɪʃən ænd, ʌnlˈaɪk hɜː sˈɪstɚz, sækˈɑːwə hæd ɐ tˈaɪp θɹˈiː mˈɑːdəl wˈʌn sˈoʊnɑːɹ, bˈeɪst ˌɔn ɐ dʒˈɜːmən dɪzˈaɪn.
To detect submarines, the Aganos were equipped with a Type 93 Model 2 hydrophone installation and, unlike her sisters, Sakawa had a Type 3 Model 1 sonar, based on a German design.