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Tide indicator Ship motif (French) ø 224 mm - 880 - Altitude
The case is made of high quality 0,6mm thick brass sheet. The surface is mirror finish polished and lacquered.
Mineral front glass.
Large tide indicator with ship motif and French text.
Accuracy: ±6 min./year (±1sec./day)
The time from the sun’s highest position one day until the next day’s highest position is 24 hours.
The period from the moon’s highest position one day until the next day’s highest position is 24 hours 50 minutes and 28 seconds.
A tide clock’s day and night accordingly lasts 50 minutes and 28 seconds longer than a normal day and night.
So the tide clock’s hand will use 12 hours 25 minutes and 14 seconds making one round, whereby the hand is showing precisely the cyclus of the tide.
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