Harbormaster Tide Clock Instrument - Satin Nickel CaseEverything Nauticalis proud to bring you this stunningHarbormaster Tide Clock Instrument with Satin Nickel Case,part of our newest collection of high-quality Nautical Instruments.Your choice of Silver or Black Dial Face.This Harbormaster Tide Clock makes it easy to track the tide on the East Coast (Atlantic) with style and class. Powered by a single AA battery (included), Harbormaster tracks according to the average time between lunar high tides in the Atlantic Ocean (approx. 12 hrs, 25 min.). Fluctuations in conditions, location, and the distance of the Moon from Earth can effect this average. However, over a lunar month, your Harbormaster tide clock will provide a practical indication of local tides.This model is also available in Polished Chrome, Polished Brass, or PVD Coated Brass - See all availablefinishes here: Harbormaster Tide Clock InstrumentThis instrument can be purchased on this