Definitions for "Ordinary Seaman"
Keywords:  seaman, navy, junior, deck, landman
Sailor with limited experience.
a most junior seaman who works in deck department and has not yet qualified as able seaman; OS for short
An ordinary seaman (OS) is a junior position to the able seaman (AB). Similar to the AB, the OS supports a vessel's deck officers in all aspects of bridge, cargo and seamanship operations and normally works under the supervision of the bosun. Abbreviations: OS; O/S.
Keywords:  crew, lowest, grade, member
(OS) Lowest grade of crew member