(n.) One who follows the business of navigating ships or other vessels; one who understands the practical management of ships; one of the crew of a vessel; a mariner; a common seaman.

AB Ancient Mariner Argonaut Dylan Flying Dutchman Neptune OD Poseidon Varuna able seaman able-bodied seaman adventurer alpinist astronaut bluejacket boatman buccaneer camper captain climber comers and goers commuter cosmopolite cruiser deep-sea man excursionist explorer fair-weather sailor fare fisherman globe-girdler globe-trotter gob goer hajji hearty jack jack afloat jack-tar jacky jet set jet-setter journeyer limey lobsterman mariner matelot mountaineer navigator old salt palmer passenger passerby pathfinder pilgrim pioneer pirate privateer rubberneck rubbernecker salt sea dog sea rover seafarer seafaring man seaman shellback shipman sightseer skipper straphanger swab swabbie tar tarpaulin tourer tourist trailblazer trailbreaker transient traveler trekker tripper viator viking visiting fireman voortrekker voyager voyageur water dog wayfarer whaler windjammer windsailor world-traveler yachtsman