A sea-cook.
1821. The cook, at sea, is generally called doctor.Mass. Spy, Aug. 1.
1830. The cook is indeed ex officio nurse general, and is in fact called the doctor in all [American] merchant ships, though his culinary avocations render his attentions to the hospital department extremely uncertain and intermittent.N. Ames, A Mariners Sketches, p. 33.