| Points of calculation in contour chart of significant wave height at excess probability of 10-2. |

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Histogram at P1; South East off the Amami Oshima Island.
(Left: significant wave height, Right: average wind speed.) |
 
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Histogram at P2; East off the Nojimazaki.
(Left: significant wave height, Right: average wind speed.) |
 
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Histogram at P3; South West off the Oga Peninsula.
(Left: significant wave height, Right: average wind speed.) |
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