boatswain's call

The rest of the pipe consists of a "keel", a flat piece of metal beneath the gun that holds the call together, and the "shackle", a keyring that connects a long silver or brass chain worn around the collar when in ceremonial uniform.

Historically the boatswain's call was used to pass commands to the crew when the voice could not be heard over the sounds of the sea. Because of its high pitch, it could be heard over the activities of the crew and bad weather. It is now used in traditional bugle calls, such as Evening Colors/Sunset, and in other ceremonies in most modern navies. It is sometimes accompanied by other auditive features such as ruffles and flourishes, voice commands and announcements, or even a gun salute. It was first used as a badge of rank for the Lord High Admiral of England in 1485.

The following are the commands that are passed with the help of a bosun's pipe. Haul: The most basic of calls. Crews of warships were not allowed to sing work songs or shanties, so the pipe coordinated the sailors. The low note was for the pause and preparatory; the high for pulling on the line. The Side or Away Galley: Descends from the tradition of hoisting officers aboard ship in a chair. It is a combination of haul, and then a command to lower. This call remains in use as an honour given to officers when embarking or disembarking. Away Boats: Used to order a ship's boats to leave the ship's side. Call the Boatswain's Mates: The boatswain's gang to report. All Hands on Deck: Crews were split into three (or earlier, two) rotating watches that stood for two to four hours at a time. This call signals the entire crew to assemble on deck. Word to be Passed: Command for silence, an order to follow. Pipe Down: Dismissal of all the crew not on watch. Sweepers: End of the work day. Ostensibly sailors would "sweep up" prior to departure in preparation for the following day. Pipe to any meal: Pipe All Hands, followed by long Heave Around (Mess gear), and long Pipe Down. Still: Used to call the crew to attention. This would be done, for example, when two warships meet, the still being piped as the junior ship salutes the senior ship (the seniority of a warship is the seniority of her captain); a less common alternative to the still being piped is a bugle call. Carry On: Used after the still, to dismiss the crew back to their duties. General Call: Piped before an announcement. Officer of the Day: Call the Officer of the Day to the Gangway.