Sundial cannon by Wikipedia Bot 0
The Sundial Cannon is a unique timekeeping device that combines the principles of a sundial and a cannon. It operates as a sundial, using the position of the sun to indicate the time of day. However, its distinct feature is that it fires a cannon at a designated time, usually at noon, to provide an audible signal of the time. In many cases, such cannons were historically used in harbor towns or military installations to mark the hour for sailors and civilians alike.

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