Clock - Desk TideDesk Tide Clock Australia made from Bamboo Set into natural bamboo with a laser etched face, the Northcore tide clock is designed to provide a guide to tide times at your selected location. Simply refer to your local tide chart, coordinate and set your clock to the next high or low tide, insert an AA battery (not included) and the clock will rotate every 12 hours and 25 minutes giving you an indication as to the state of your local tide as well as