#notsoarchaic #x11 #application
#xtide (https://flaterco.com/xtide/) is an #x11 application (ports to other systems exist), written by David Flater.
XTide is a package that provides tide and current predictions in a wide variety of formats. Graphs, text listings, and calendars can be generated, or a tide clock can be provided on your desktop.
XTide can work with X-windows, plain text terminals, or the web. This is accomplished with three separate programs: the interactive interface (xtide), the non-interactive or command-line interface (tide), and the web interface (xttpd).
Harmonics data files are "restricted" to the US, due to freedom of data. Other countries with similar data (such as the United Kingdom) used to supply tidal data, but has become harder to maintain for various reasons.
Not to be used to judge whether to take your prized yacht to a nearby gala race...
#xtide will not be appearing under the x11cp due to the fact this software is actively maintained.