CR40/42/50 MKII C-MAP attributes Appendix C
165
subject to variables, which, like the weather, are beyond the control of man.
The tide predictions are based on normal weather conditions. Hurricanes and
strong winds will often have a strong influence on the water level, which can
vary several meters.
Changes in a coast line, either due to natural erosion, major storms or larger man-
made constructions, like breakwaters or dredged canals, can also have influence
on the local tide situation.
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