They would continue to do so until they performed their last mid-course correction, switching to a reference frame based on ideal orientation for the second engine burn they would make in lunar orbit.
ðeɪ wʊd kəntˈɪnjuː tə dˈuː sˌoʊ ʌntˈɪl ðeɪ pɚfˈɔːɹmd ðɛɹ lˈæst mˈɪdkˈoːɹs kɚɹˈɛkʃən, swˈɪtʃɪŋ tʊ ɐ ɹˈɛfɹəns fɹˈeɪm bˈeɪst ˌɔn aɪdˈiəl ˌoːɹiəntˈeɪʃən fɚðə sˈɛkənd ˈɛndʒɪn bˈɜːn ðeɪ wʊd mˌeɪk ɪn lˈuːnɚɹ ˈɔːɹbɪt.