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TIDE

CALCULATOR

With a Tide Calculator you can quickly work out the time of Slack Water and see when streams are fastest in either direction.

CIRCUMPOLAR

STAR MAP

MOON

CALCULATOR

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With a Moon Calculator you can predict the tides years in advance, simply by observing the moon phase (it comes with a 5-year Lunar Calendar).

LUNAR

CALENDAR

STAR

CALCULATOR

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With a Star Calculator you can predict the position of any star from anywhere in the world, on any night of year.