On Tuesday, June 2, 2020 at 7:51:11 PM UTC-4, Phil Owers wrote:
>
> By changing the interval and deleting the database I can now change whats 
> displayed
> Interval = 86400 displays jun3 to jun4
> Interval = 864000 gives a display of Jun3rd to Jun14
> However changing the interval to anything higher  say 20 days (1728000) 
> makes no difference and I did delete the database twice .
>

the 'interval' determines how often the tide forecast is calculated

the 'duration' determines how far into the future the forecast will extend

if you do not specify a duration, then the duration defaults to twice the 
interval

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