| 摘要 |
PURPOSE: A calendar is provided to display relative strength of tide according to the difference between the rise and fall of the tide with a high tide time and the age of the moon as well as a line graph. CONSTITUTION: A calendar contains a predicted year display(1), a predicted month display(2), a predicted area name(3) and a position coordinate(4). The predicted values per hour are indicated as a point(7) and values per twelve hours are indicated by a circle(8). The points are connected to be a line graph(5). Herein, a date display(15), a memo space(16), a tide time space(17) and the age of the moon space(17) are added. A scale rule(6) is in a vertical shaft and a spot line(10) is in a horizontal shaft to easily understand the change of a tide position. According to the change of the tide position, brightness gradations(13,14) are given.
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