pˈɑːɹsənz dɪvˈɛləpt hˈɛlɪkəl ɹᵻdˈʌkʃən ɡˈɪɹɪŋ fɔːɹ mɚɹˈiːn tˈɜːbaɪnz, ænd ɪn nˈaɪntiːnhˈʌndɹɪd ˈeɪt kənvˈɜːɾᵻd ðə kˈɑːɹɡoʊ ʃˈɪp tə tˈɜːbaɪn pɹəpˈʌlʃən wɪð ɹᵻdˈʌkʃən ɡˈɪɹɪŋ.
Parsons developed helical reduction gearing for marine turbines, and in 1908 converted the cargo ship  to turbine propulsion with reduction gearing.