Lunitidal interval

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lunitidal interval

(Also called local establishment.) An old term for the interval of time at a particular location, between the transit (upper or lower) of the moon and the next semidiurnal high water.

This varies slightly during a spring-neap tidal cycle. The interval at the times of full and new moon is called "high water full and change."
See nonharmonic tidal analysis, cotidal hour.

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