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Mean low water springsA tidal datum; the average spring low water level, averaged over a sufficiently long period.
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Mean low water springsThe height of mean low water springs is the average height obtained by two successive low watrs during the same periods.
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Mean low water springsA tidal datum. Frequently abbreviated spring low water. The arithmetic mean of the low water heights occurring at the time of spring tides observed over the National Tidal Datum Epoch. It is usually d [..]
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