📄 daylighttimeissues.html
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<div align="center"> <h1><font color=#800040>JTides Help | Daylight Time</font></h1></div>
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<br>"JTides" will use daylight time for the displayed sunrise and sunset times and the graphic display of daylight hours. There are three options, avaiilable in the configuration (<img src="../DocumentMag.gif" width="20" height="20" alt="">) dialog: always use standard time, compute daylight time, and always use daylight time. These options exist because not all locations use daylight time in the same way.
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<br>Computed daylight time uses the host computer's assumptions about appropriate dates for daylight time. If this assumption is not correct, simply choose one of the two overriding modes.
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<br>It is important to realize the daylight time options only affect the sunrise and sunset time computations and the various time displays. The tidal computations automatically take daylight time into account, if it is locally appropriate. The way the agencies responsible for tidal data do this is by subtly adjusting some of the mathematical constants used in tidal computation, so unfortunately the presence or absence of tidal daylight time cannot be detected to decide the issue of sunrise/sunset daylight time. This is why the user must decide about daylight time for the sun and time display data.
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<br>As a result of this rather weird arrangement, you will notice the daylight time choice has no effect on the tidal/current time display, which is intrinsically adjusted for daylight time. The choice only affects the sunrise/sunset computations and displayed times.<p>
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