shipmate

From ship +‎ -mate.

shipmate (plural shipmates)

1. (nautical) A fellow sailor serving on the same ship as another.
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     1881–1882, Robert Louis Stevenson, Treasure Island, London, Paris: Cassell & Company, published 14 November 1883, →OCLC:

     "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.

2. (nautical, informal) Any sailor (when used as a form of address by a sailor).

• aphetism, mateship, spithame, teamship