Lunar dust kicked up by the LM's engine began to impair his ability to determine the spacecraft's motion.
lˈuːnɚ dˈʌst kˈɪkt ˌʌp baɪ ðɪ ˌɛlˈɛmz ˈɛndʒɪn bɪɡˈæn tʊ ɪmpˈɛɹ hɪz ɐbˈɪləɾi tə dɪtˈɜːmɪn ðə spˈeɪskɹæfts mˈoʊʃən.