ɔːltˈɜːnətˌɪv plˈænz fɔːɹ kənvˈɜːɾɪŋ swˈɪftʒɚ tʊ ɐ hˈɛlɪkˌɑːptɚ kˈæɹiɚ wɜːɹ ɔːlɹˌɛdi bˌiːɪŋ kənsˈɪdɚd sˈɪɹiəsli baɪ nˈaɪntiːnhˈʌndɹɪd fˈɪfti ˈeɪt,
Alternative plans for converting Swiftsure to a helicopter carrier were already being considered seriously by 1958,