Long Waves at Marsden Point 

Data kindly supplied by Mulgor Consulting Ltd. and Silver Fern Shipping Ltd.

Figure 1. Long Waves at Frenchman Island near Marsden Point showing: A. long wave record; B. significant (red) and maximum (blue) wave heights, and high tide times (green diamonds); C. period of significant waves; and D. distribution of significant wave height with time and period.

How were these calculated?
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