context: Halpin was promoted to second mate of Salem, a wool clipper on the Australia run, before he transferred over from sail to steam ships.
source: Halpin believed steam was the future of shipping and became first officer in Khersonese.
reference_original: Halpin pensait que la vapeur constituait l'avenir du transport maritime et est devenu commandant en second à Chersonèse.
reference_flipped: Halpin pensait que la vapeur constituait l'avenir du transport maritime et est devenu commandante en second à Chersonèse.