Enjoy optimal security on the high seas with the Bluewater Time and Tide Clock. Sure to get the stamp of approval from your favorite sailor or boating enthusiast, it makes a terrific gift. This practical design includes combination quartz and tide clock movement that averages the lunar cycle. The tide sector has been calibrated for the East Coast of the United States, although it will work for other bodies of water; it simply requires more frequent re-setting. Part of the Bluewater Collection, this precision instrument features a molded high-impact black styrene case with hinged, glare-resistant bezels in a matte finish and scratch-resistant glass crystal face. The solidly constructed knurled brass locking lug ensures freedom of movement and easy access to the battery. Splash-resistant and resistant to corrosion, this case with O-ring seal was designed with convenience in mind. It requires little maintenance. This piece comes complete with mounting hardware, the required battery, and instructions. It is backed by the manufacturer"s limited lifetime warranty. About Weems & Plath Founded in 1928, Weems & Plath is a company steeped in the rich tradition of navigation. They offer a wide spectrum of precision instruments ranging from brass nautical clocks and barometers to binoculars and children"s books. The company"s dedication to providing the highest quality possible is evident in every step of the building process. From development to production, Weems & Plath strives to be meticulous and offer exceptional service. The rich history and high standards of Weems & Plath will carry on into the future. * High-impact black styrene case with glass crystal face * Combination quartz and tide clock movement * This clock"s tide accuracy is available only in East Coast locations. It is suitable for decorative purposes in other locations.