Further information about Time-and-tide-clock.pdf The full title of the document is: Your Time-and-Tide-Clock - How it works, setting it up and keeping it accurate. Revisions: First release: 2008-Oct-28 The document is not written for any particular brand of time-and-tide clock. The information and instructions it contains are generic to all such clocks. These clocks typically have four hands. The first three are those found on standard wall clocks, which have an hour-hand, a minutes-hand and a seconds-hand. The fourth hand is the tide-hand. The clock movement typically has two adjustment knobs for manually setting the clock hands. One knob moves all four hands simultaneously in the ratios dictated by the gearing mechanism. The second is a dedicated tide-hand adjustment knob, which moves the tide hand independently of the other hands. This document gives some elementary astronomical background information to help you understand how such a clock works. It also contains advice on setting it up for your location and for keeping it accurate, as well as information on factors affecting the accuracy and reliability of such a clock.