Jack tar is a term used to refer to sailors or seamen, particularly in the British navy. Synonyms for this term include "able seaman", "deckhand", "mariner", "sailor", "seafarer", and "navigator". These words all refer to individuals who work at sea and are skilled in a variety of tasks related to navigation, maintenance, and operation of ships. In addition to these terms, other slang words for sailors include "salt", "seadog", and "tar". These synonyms are useful to know when discussing maritime topics, including history, culture, and industry.