1 moment from 1761 on 360n60, each told in 60 words or fewer.
In 1761 and 1762, John Harrison's fourth sea clock, H4, sailed from England to Jamaica and lost only about five seconds over the voyage. Accurate time at sea let sailors calculate their longitude, their position east or west, for the first time. Harrison, a self-taught carpenter and clockmaker, had worked on the problem for decades.
360