Ship's bell

The ship's bell was a traditional Earth nautical device designed to indicate time intervals in relation to duty watches aboard a ship with the sounding of a bell.

In the late-23rd century, some Federation Starfleet starships had a ship's bell, with the USS Enterprise (NCC-1701) being an example. In 2293, aboard the USS Enterprise (NCC-1701-A), as the ship's bell sounded, the Klingon delegation were preparing to transport back to Kronos One after dinner and General Chang rhetorically asked "have we not heard the chimes at midnight?"