hɪz mˈɪʃən wʌz dᵻpˈɛndənt ˌɔn ɹˈɛɡjʊlɚ ɹˈeɪdɪˌoʊ kˈɑːntækt ænd hiː ɹᵻsˈiːvd tɹˈeɪnɪŋ ɪnðə bˈeɪsɪks ʌv ɹˈeɪdɪˌoʊ tɹænsmˈɪɾɪŋ.
His mission was dependent on regular radio contact and he received training in the basics of radio transmitting.