Tide Clock - Atlantic Coast High & Low Tidal Times Easy To Set Tide Clock - Install battery. Look up tide times online (or ask an old fisherman). Turn tide clock hand to match tide prediction. Hang up tide clock. The End. ** I will also send more specific instructions with your clock. This tide clock works for locations: on the East Coast of the USA. any place around the world with semi-diurnal tides - 2 sets of tides each day - 2 low tides and 2 high tides. Specifics: Fisherman design. 8 1/2 inches wide Glass Lens Plastic Case Powered by one ``AA`` battery. This clock will NOT WORK on the Gulf coast or West Coast. Tide clocks are a great gift for fishermen, surfers, boaters, beachcombers. FREE SHIPPING! This clock is new WITHOUT packaging. It is designed, assembled, and TESTED by me I appreciate your consideration.