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This figure "shows the cotidal lines and the lines of equal rise and fall for a diurnal component in latitude 30 degrees north." -Coast and Geodetic Survey, 1901

Cotidal Lines

This figure "shows the cotidal lines and the lines of equal rise and fall for a diurnal component in…

The diagram shows cotidal lines projected for a larger body of water.

Diurnal Cotidal Lines

The diagram shows cotidal lines projected for a larger body of water.