Time Ball

Jan 1, 2022 • Wikireadia

A time ball or timeball is an obsolete time-signaling device. It consists of a large, painted wooden or metal ball that is dropped at a predetermined time, principally to enable navigators aboard ships offshore to verify the setting of their marine chronometers. Accurate timekeeping is essential to the determination of longitude at sea.

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Wikipedia contributors. October 20, 2021. Time ball. (n.d.). In Wikipedia, The Free Encyclopedia. Retrieved December 24, 2021, from

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Times Square Ball
Eden, Janine and Jim from New York City, CC BY 2.0, via Wikimedia Commons

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