XTide is a substantial program for tidal predictions based on harmonics.
xtide.el is a little interface to the XTide program output for viewing in an Emacs buffer. Get it from
M-x xtide shows a graph in a buffer, and other output styles can be selected too. One of the best features is a tie-in to CalendarMode, the
T key is setup there to show tides for the selected date, like
S does for sunrise or
M for phase of the moon.
tcd-format.el sets up a FileFormat to decode XTide
.tcd tide constituent database files. It’s meant just for having a nose around in those files if you don’t have the source handy. Get it from
(For Emacs 21 you’ll want XmlCoding to get the right charset in the “substations” part.)