ˌɔn sˈɛvən ˈeɪpɹəl nˈaɪntiːnhˈʌndɹɪd fˈoːɹɾi fˈoːɹ, wˌaɪl ˈɑːpɚɹˌeɪɾɪŋ wɪð ɐ hˈʌntɚkˈɪlɚ tˈæsk jˈuːnɪt kəmpˈoʊzd ʌv dˌiːdˈiːz ænd dˌiːˈiːz, ˈɔːɹdɹənˌɔːks spˈɑːɾᵻd ɐ dʒˈɜːmən sˈʌbmɚɹˌiːn sˈaʊθ ʌv nˈoʊvə skˈoʊʃə.
On 7 April 1944, while operating with a hunter-killer task unit composed of DDs and DEs, Ordronaux spotted a German submarine  south of Nova Scotia.