-b``YYYY-MM-DDHH: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.
-cf``format-string''strftime(3) style format string for printing days in calendars (default %a %d).
-chpixels
Height for tide clocks (default 312 pixels).
-cwpixels
Width for tide clocks (default 84 pixels).
-dccolor
Daytime background color in tide graphs (default SkyBlue).
-Dccolor
Color of datum line in tide graphs (default white).
-df``format-string''strftime(3) style format string for printing dates (default %Y-%m-%d). For calendars see -cf.
-e``YYYY-MM-DDHH: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.
-eccolor
Foreground in tide graphs during outgoing tide (default SeaGreen).
-ely|n
Select whether or not to draw datum and middle-level lines in tide graphs (default n).
The National Ocean Service (NOS) defines both Mean Sea Level (MSL) and Mean Tide Level (MTL) in
terms of averages taken over observations. The middle-level line is drawn at the midpoint of the
theoretical tidal range, which usually corresponds to the mathematical mean level of the
predictions. This approximates both MSL and MTL, but, strictly speaking, is equivalent to
neither. Moreover, subordinate station offsets may shift the actual mean so that it no longer
falls at the midpoint of the tidal range. The datum line is drawn at the zero level of the
predictions, which usually corresponds to the station's benchmark, but this too can be rendered
inaccurate by subordinate station offsets.
-empSsMm
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.
-fc|h|i|l|p|t|v
Specify the output format as CSV, HTML, iCalendar, LaTeX, PNG, text, or SVG. The default is text.
-fccolor
Foreground in tide graphs during incoming tide (default Blue).
-fgcolor
Color of text and other notations (default black).
-gaaspect
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.
-ghpixels
Height for tide graphs (default 312 pixels).
-gsd|l|s
Style of graphs and clocks. Valid values: d (default), l (line), s (semitransparent).
-gty|n
Select whether or not to label tenths of units in tide graphs (default n).
-gwpixels
Width for tide graphs (default 960 pixels).
-hf``format-string''strftime(3) style format string for printing hour labels on time axis (default %l).
-iny|n
Select whether or not to use inferred values for some constituents (default n). For expert use
only.
-l``locationname''
Specify a location for tide predictions. You get the first station where the name supplied with
-l is a case-insensitive match with the beginning (or the entirety) of the station's name.
-lby|n
Select whether or not calendar mode inserts a line break before prediction values (default n).
-lwpixels
Width of line in graph styles l and s (default 2.5 pixels).
-ma|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.
-mccolor
Color of mark line in graphs (default red).
-Mccolor
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
-nccolor
Nighttime background color in tide graphs (default DeepSkyBlue).
-o``filename''
Redirect output to the specified file (appends).
-ouy|n
Select whether or not to print numbers with no ft/m/kt (default n). Where possible, adds a header
line stating the units and datum.
-pby|n
Select whether or not calendar mode inserts a page break and repeats the station header for each
month in text, HTML, and LaTeX formats (default y).
-phmm Nominal length of paper in LaTeX output (default 420 mm). This need not match your actual paper;
use "Shrink oversized pages" in print options.
-pidays
Number of days of predictions to generate when no end time is specified (default 4).
-pmmm Nominal width of top, bottom, left and right margins in LaTeX output (default 10 mm). Actual
width will depend on print scaling.
-pwmm 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).
-thcharacters
Height of ASCII graphs and clocks (default 24 characters).
-tly|n
Select whether or not to draw depth lines on top of the tide graph (default n).
-toopacity
Opacity of the fill in graph style s (semitransparent) (default 0.65).
-twcharacters
Width of text format (default 79 characters).
-uft|m
Preferred units of length (default no preference).
-v Print version string and exit.
-zy|n Select whether or not to coerce all time zones to UTC (default n).
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