shipmate

Noun

shipmate (plural shipmates)

1. A fellow sailor serving on the same ship as another.
   • "And who else?" returned the other, getting more at his ease. "Black Dog as ever was, come for to see his old shipmate Billy, at the 'Admiral Benbow' inn. Ah, Bill, Bill, we have seen a sight of times, us two, since I lost them two talons," holding up his mutilated hand.1881–1882, Robert Louis Stevenson, Treasure Island, London; Paris: Cassell & Company, published 14 November 1883, →OCLC
   • But the feeling certainly does not extend to a shipmate who dobs his cobber in for a draft from a happy ship!1960, J. E. Macdonnell, Don't Gimme the Ships, Melbourne: Horwitz Publications, page 49
2. (informal) Any sailor (when used as a form of address by a sailor).