ɔːlðˈoʊ mˈɑːɹʃi sˈɔɪl kəndˈɪʃənz slˈoʊd ðɪ ˌɛndʒɪnˈɪɹz pɹˈɑːɡɹɛs, ɐmˈɛɹɪkən fˈaɪɾɚ plˈeɪnz wɜː jˈuːzɪŋ ðə pwˈɛɹɾoʊ pɹˈɪnssə ˈɛɹstɹɪp baɪ lˈeɪt mˈɑːɹtʃ nˈaɪntiːnhˈʌndɹɪd fˈoːɹɾi fˈaɪv.
Although marshy soil conditions slowed the engineers' progress, American fighter planes were using the Puerto Princesa airstrip by late March 1945.