ðɪ ˌɛmkˈeɪ fˈaɪv twˈɪn fˈoːɹɾi ˌɛmˈɛm klˈoʊsɪn ˌeɪˈeɪ bˈæɾɚɹiz lˈaɪk ðə sˈɪŋɡəl nˈaɪntiːnhˈʌndɹɪd fˈɪfti z ˌɛmkˈeɪ sˈɛvən slˈæʃ nˈaɪn fˈoːɹɾi ˌɛmˈɛm ˈɛl sˈɪksti bˈɑːfɔːɹs wɜː mˈoːɹ ɪfˈɛktɪv ðɐn sˈɛkənd wˈɜːld wˈɔːɹ tˈuːpˌiːdˌiːˈɑːɹ "pˈɑːm pˈɑːm" ɔːɹ ˌɛmkˈeɪ θɹˈiː fˈoːɹɾi ˌɛmˈɛm bˈɑːfɔːɹs ænd stˈɪl sˈʌmwʌt jˈuːsfəl ɐɡˈɛnst fˈɜːst ænd sˈɛkənd dʒˌɛnɚɹˈeɪʃən dʒˈɛts ɪnðə nˈaɪntiːnhˈʌndɹɪd ˈeɪɾi tˈuː fˈɔlkləndz wˈɔːɹ ˈɪndᵻkˌeɪɾᵻd bˌʌt baɪ nˈaɪntiːnhˈʌndɹɪd fˈɪfti nˈaɪn, wɜː sˈiːn æz ʌnfˈæʃənəbəl ænd ɪɹˈɛlᵻvənt tə ðɪ ɛkspˈɛktᵻd sənˈæɹiˌoʊz ʌv mˈɪsəl, stˈændɔf ænd hˈaɪ lˈɛvəl ɐtˈæk ænd ðə lˈæst fˈɪɾɪŋz ʌv mˌʌltɪpəl tˈaɪp tˈuːhˈʌndɹɪd sˈɪksti tˈuː ɹˈeɪdɑːɹ kəntɹˈoʊld ˌɛmkˈeɪ fˈaɪv mˈaʊnts wɜːɹ ɪn nˈaɪntiːnhˈʌndɹɪd fˈɪfti nˈaɪn ˈɔn ænd .
The Mk 5 twin 40 mm close-in AA batteries like the single 1950s Mk 7/9 40mm L60 Bofors were more effective than Second World War 2-pdr "pom pom" or Mk 3 40 mm Bofors and still somewhat useful against first and second generation jets in the 1982 Falklands War indicated but by 1959, were seen as unfashionable  and irrelevant to the expected scenarios of missile, standoff and high level attack and the last fittings of multiple Type 262 radar controlled Mk 5 mounts were in 1959 on  and .