ɐtˈætʃt tə ðə fˈɜːst sˈʌbmɚɹˌiːn flətˈɪlə bˈeɪst ɪn ˌælɪɡzˈændɹiə, ænd ˌʌndɚ ðə kəmˈænd ʌv luːtˈɛnəntkəmˈændɚɹ ˈɛdwɚd kɹˈɪstʃən fɹˈɛdɚɹˌɪk nˈɪkəlˌeɪ dˌiːˌɛsˈoʊ ˌɑːɹɹˈɛn sˈiː nˈɪkəlˌeɪ fˈæmɪli, ʃiː sˈæŋk ðə θɹˈiː,ˈeɪthˈʌndɹɪd sˈɪksti sˈɛvəntˈʌn ɪtˈæliən tˈæŋkɚ mˈaɪə sˈaʊθ ʌv tɛnˈiːdoʊz ˌɔn fˈaɪv sɛptˈɛmbɚ nˈaɪntiːnhˈʌndɹɪd fˈoːɹɾi wˈʌn, ænd ˌɔn tˈuː ɑːktˈoʊbɚ, ðə tˈuː,zˈiəɹoʊ ˈeɪɾi sˈɪkstˈʌn mˈɜːtʃənt ʃˈɪp kˈæsɛlən wˈɛst ʌv bɛŋhˈɑːzi.
Attached to the 1st Submarine Flotilla based in Alexandria, and under the command of Lieutenant-Commander Edward Christian Frederick Nicolay DSO RN (see Nicolay (family)), she sank the 3,867-ton Italian tanker Maya  south of Tenedos on 5 September 1941, and on 2 October, the 2,086-ton merchant ship Castellon west of Benghazi.