Wiktionary
n. (context nautical English) a whistle, previously used by boatswain's mates to pipe orders throughout a ship; now used for the ceremonial piping onboard of visiting dignitaries
Usage examples of "boatswain's pipe".
She began it officially by emerging from the back room clad in a dragon-embroidered kimono given her by an admirer in the Seventh Fleet, raising a gold boatswain's pipe to her lips, and blowing Chow Down.
In bad moments in Kuibyshev, on Siberian trains, in Tokyo streets, in the Manila club, Pug had cheered himself with pictures of his reception aboard this ship: side boys in white saluting, honor guard on parade, boatswain's pipe trilling, commanding officers shaking hands at the gangway, a sweet triumphant tour of a great ship shined up to holiday beauty and brilliance.