This Victory Tide clock tells time as well as tide level on the North American east coast. Nautical Porthole style brass case. Great for office, home or boat. 4 inch diameter dial face, 5.5" diameter case.
Tide clocks can be used wherever there are semidiurnal tides. On the Atlantic Coast of the United States and Canada the tide clocks seldom need adjustment. On the Pacific side of North America, including Hawaii, they can be calibrated to different coastal locations with special setting tables but they must be reset once a week on Saturdays to be accurate. This is because the Pacific tides are mixed semi-diurnal south of Alaska’s Yakulat region all the way to Central America. Tide clocks will not work in the Gulf of Mexico.