Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
sea-duty is a noun meaning "naval service aboard a ship at sea". It carries one recorded sense.
naval service aboard a ship at sea
Definitions, synonyms and semantic relations for sea-duty come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.