ARMY BOATSWAIN WHISTLE

BOATSWAIN  WHISTLE. Made in metal.A boatswain (pronounced /ˈboʊsən/; formerly also /ˈboʊtˌsweɪn/), bo's'n, bos'n, or bosun is an unlicensed member of the deck department of a merchant ship. The boatswain supervises the other unlicensed members of the ship's deck department, and typically is not a watchstander, except on vessels with small crews. Other duties vary depending on the type of ship, her crewing, and other factors.