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A boatswain's call, pipe, or bosun's whistle is a pipe or a non-diaphragm type whistle used on naval ships by a boatswain. Making a loud, authoritative call, it was traditionally 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. Acme's boatswain pipe could be useful for a variety of theatre or orchestra performances.
The pipe consists of a narrow tube (the gun) which directs air over a metal sphere (the buoy) with a hole in the top. The player opens and closes the hand over the hole to change the pitch.
To this day Acme police whistles are manufactured in Birmingham using the original techniques and machinery from the 1800s. Outstanding craftsmanship and strict quality testing ensure every whistle is of the highest standard.
