Provided by: xtide_2.11-1_amd64 bug


       tide - Harmonic tide clock and tide predictor (command line client)


       tide  [-b  ``YYYY-MM-DD  HH:MM'']  [-ch  pixels] [-cw pixels] [-dc color] [-Dc color] [-df
       ``format-string''] [-e ``YYYY-MM-DD  HH:MM'']  [-ec  color]  [-el  y|n]  [-em  pSsMm]  [-f
       c|h|i|l|p|t] [-fc color] [-fg color] [-ga aspect] [-gh pixels] [-gt y|n] [-gw pixels] [-hf
       ``format-string'']   [-in   y|n]    [-l    ``location    name'']    [-lw    pixels]    [-m
       a|b|c|C|g|k|l|m|p|r|s]  [-mc  color]  [-Mc  color] [-ml [-]N.NN(ft|m|kt)] [-nc color] [-nf
       y|n] [-o ``filename''] [-ph mm] [-pm mm] [-pw mm] [-s ``HH:MM'']  [-tf  ``format-string'']
       [-tl y|n] [-th characters] [-tw characters] [-u ft|m] [-v] [-z y|n]


       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).

       tide  is  the non-interactive command line client for XTide 2.  For a complete discussion,
       please see the verbose documentation at


       Unless a configuration file /etc/xtide.conf is supplied,  you  must  set  the  environment
       variable  HFILE_PATH to point to the harmonics files that should have been installed along
       with the xtide program.  Example:
              export HFILE_PATH=/usr/local/share/xtide/harmonics.tcd
       If a configuration file is used, the first line should consist of the colon-separated list
       of harmonics files (e.g. the HFILE_PATH line above without the "export HFILE_PATH=" part).
       The environment variable takes precedence over the configuration file.  Also, note that on
       Debian  systems  the  tidal  harmonics data file are stored in /usr/share/xtide instead of
       /usr/local/share/xtide as used above.

       Set the environment variable XTIDE_DEFAULT_LOCATION to the name of your favorite place  if
       you want to skip the location-choosing step.


       -b ``YYYY-MM-DD HH:MM''
              Specify  the begin (start) time for predictions using the ISO 8601 compliant format
              YYYY-MM-DD HH:MM, where hours range from 00 to 23.  The timestamp is in  the  local
              time  zone for the location, or in UTC if the -z setting is engaged.  If clock mode
              is selected or if no -b is supplied, the current time will be used.

       -ch pixels
              Height for tide clocks (default 312 pixels).

       -cw pixels
              Width for tide clocks (default 84 pixels).

       -dc color
              Daytime background color in tide graphs (default SkyBlue).

       -Dc color
              Color of datum line in tide graphs (default white).

       -df ``format-string''
              strftime(3) style format string for printing dates (default %Y-%m-%d).

       -e ``YYYY-MM-DD HH:MM''
              Specify the end (stop) time for predictions in  banner,  calendar,  alt.  calendar,
              medium  rare,  plain, raw, or stats mode.  Does not apply in graph and clock modes:
              the effective end time for graph and clock modes  is  entirely  determined  by  the
              start time (-b), the width (-cw, -gw or -tw), and the aspect (-ga).  The format and
              time zone are the same as for -b.  If no -e is supplied, the end time will  be  set
              to four days after the begin time.

       -ec color
              Foreground in tide graphs during outgoing tide (default SeaGreen).

       -el y|n
              Select  whether or not to draw datum and middle-level lines in tide graphs (default

       -em pSsMm
              Events to suppress (p = phase of moon, S = sunrise, s = sunset, M = moonrise,  m  =
              moonset),  or  x  to  suppress none.  E.g, to suppress all sun and moon events, set
              eventmask to the value pSsMm.

       -f c|h|i|l|p|t
              Specify the output format as CSV,  HTML,  iCalendar,  LaTeX,  PNG,  or  text.   The
              default is text.

       -fc color
              Foreground in tide graphs during incoming tide (default Blue).

       -fg color
              Color of text and other notations (default black).

       -ga aspect
              Aspect  for  tide graphs, clocks, and banners (default 1.0).  This controls not the
              width or height of the window but rather the relative scaling of the X and  Y  axes
              in the plot of the tide curve.

       -gh pixels
              Height for tide graphs (default 312 pixels).

       -gt y|n
              Select whether or not to label tenths of units in tide graphs (default n).

       -gw pixels
              Width for tide graphs (default 960 pixels).

       -hf ``format-string''
              strftime(3) style format string for printing hour labels on time axis (default %l).

       -in y|n
              Select  whether  or  not  to use inferred values for some constituents (default n).
              For expert use only.

       -l ``location name''
              Specify a location for tide predictions.

       -lw pixels
              Width for lines in tide graphs with -nf (default 2.5 pixels).

       -m a|b|c|C|g|k|l|m|p|r|s
              Specify mode to be about, banner, calendar,  alt.  calendar,  graph,  clock,  list,
              medium rare, plain, raw, or stats.  The default is plain.

       -mc color
              Color of mark line in graphs (default red).

       -Mc color
              Color of middle-level line in tide graphs (default yellow).

       -ml [-]N.NN(ft|m|kt)
              Specify the mark level to be used in predictions.  The predictions will include the
              times when the tide level crosses the mark.  Not supported in clock mode.   Example
              usage: -ml -0.25ft

       -nc color
              Nighttime background color in tide graphs (default DeepSkyBlue).

       -nf y|n
              Select whether or not to draw tide graphs as line graphs (default n).

       -o ``filename''
              Redirect output to the specified file (appends).

       -ph mm Nominal length of paper in LaTeX output (default 420 mm).  This need not match your
              actual paper; use "Shrink oversized pages" in print options.

       -pm mm Nominal width of top, bottom, left and right margins in LaTeX  output  (default  10
              mm).  Actual width will depend on print scaling.

       -pw mm Nominal  width  of paper in LaTeX output (default 297 mm). This need not match your
              actual paper; use "Shrink oversized pages" in print options.

       -s ``HH:MM''
              Specify the step interval, in hours and  minutes,  for  raw  or  medium  rare  mode
              predictions.  The default is one hour.

       -tf ``format-string''
              strftime(3) style format string for printing times (default %l:%M %p %Z).

       -tl y|n
              Select whether or not to draw depth lines on top of the tide graph (default n).

       -th characters
              Height of ASCII graphs and clocks (default 24 characters).

       -tw characters
              Width of ASCII graphs, clocks, banners, and calendars (default 79 characters).

       -u ft|m
              Preferred units of length (default no preference).

       -v     Print version string and exit.

       -z y|n Select whether or not to coerce all time zones to UTC (default n).


       xtide(1), xttpd(8),