Akademik

(nautical) each of the eight half-hour units of nautical time signaled by strokes of a ship's bell; eight bells signals 4:00, 8:00, or 12:00 o'clock, either a.m. or p.m.

1. : a bell used on shipboard to strike each half hour of a watch

2. : ship's clock

ship's bell,

the bell on a ship that is struck every half hour to tell time, indicate the time of the watch, etc.