Tide Clocks tell you if it is high tide or low tide, rising tide or falling tide. Great for fishing, boating, surfing, beach walking, shelling, or metal detecting. The unique dials used in cTc clocks are from our personal collection of photographs or those shared by family and friends. Each dial is personally designed, printed, assembled, tested, and shipped from our family-run business located in North Carolina. cTc tide clocks work best for the Atlantic Ocean and its waters. To learn more about how and where tides and tide clocks work, click this link: ABOUT TIDES.