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From ourTidal Stream Atlas we get 15,30

which we know means 1.5 knots on Neaps and 3.0 knots on Springs.

Time Height 0708 $.5m 1330 1.2m Rangę 4.3m

From our Tide Tables get Times and Heights.

If we subtract the Height of High Water (5.5m) from the height of Low Water {1.2m) we have the Rangę (4.3m)

1.    Draw a linę (A) through the Neap Ratę and the Spring Ratę.

2.    Work out the Rangę of the tide and draw a horizontal linę (B) to intersect A.

3.    Draw a vertical Linę (C) from intersection and read off the Ratę.

Computation of Rates