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Tide calendar, which combines both a daily tide indicator and a monthly tear-off type calendar, has a rotating disk that is used with daily angle and hourly angle scales
Tide calendar, which combines both a daily tide indicator and a monthly tear-off type calendar, has a rotating disk that is used with daily angle and hourly angle scales
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机译：潮汐日历结合了每日潮汐指示器和月度撕裂式日历，并具有一个旋转盘，可用于每日角度和小时角度刻度
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摘要
Tide calendar comprises both a day angle scale and an hour scale, both of which are described in . The scales are printed on a calendar sheet. A rotating disk which is used with the scales has fixed angles between pointers for high and low tides and a pointer for the day.
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