Moon & Tide Calendar
This navigational tool is a reproduction of the lunar and tides calendar used in the 16th-century. By knowing the phase of the moon on a given day, sailors were able to determine the hours in which the high and low tides will occur.
The instrument may also be used to retroactively determine the phases of the moon on previous dates. The epact, or age of the moon on January 1, repeats in a 19-year cycle, so one can determine the phase of the moon on dates long past. Just simply follow the calculations in the brochure that accompanies it and become an amateur astronomer.
The calendar is made of a zamak alloy and is brass plated, which ensures durability. It comes in a beautiful decorative box and includes booklet instructions for use.
Size: The Moon and Tide Calendar is approximately 9.5 cm (3.74 inches) wide, 13 cm (5.12 inches) tall, and comes with a wooden pedestal stand.