Beautiful Nautical Wood Map Tide Clock for all your favorite East Coast Locations! Handcrafted in the USA Designed by a fisherman nearly 40 years ago, our 16" Nautical Chart Tide Clocks make a great gift for a fisherman, sailor, or anyone who has spent a lifetime anchored by the water. • Size: 16” Diameter • Made of Baltic Birch • Available in Deep Blue or Blue Green Water Stain • Accent Ring available in all Birch, Driftwood Gray, Golden Honey, Warm Americana or Sun Bleached Blue • Water Depth Map with laser engraved bathymetric contours recessed one level below the shoreline. • Lunar Quartz mechanism operates on one AA battery, not included. Tide Clocks do not show the time but the tide, and more precisely the time remaining between low tide and high tide. Instructions are provided but as a general rule, it is best to set the tide hand at high tide during a full or new moon. We do not offer tide clocks for the West Coast or Gulf of Mexico as those tides are too irregular.