NAME

       opencpn - Chartplotter and GPS Navigation Software

SYNOPSIS

       opencpn [options]

DESCRIPTION

       OpenCPN is a chartplotter and navigation GUI program supporting navigation under way as well as planning.
       It supports a wide range of chart formats using a plugin system. Other plugins provides support for e. g.
       radar,  AIS  and  weather  maps. Program is localized in 20+ languages and ported to several OS including
       MacOS, Windows and Linux.

OPTIONS

       -h, --help
              Show help info.

       -p     Run in portable mode.

       -l, --loglevel=<level>
              Set amount of logged information. Level is any of trace, debug, info, message, warning  or  error,
              defaulting to info if not set in environment; see ENVIRONMENT.

       -fullscreen
              Switch to full screen mode on start.

       -no_opengl
              Disable OpenGL video acceleration. This setting will be remembered.

       -rebuild_gl_raster_cache
              Rebuild OpenGL raster cache on start.

       -parse_all_enc
              Convert all S-57 charts to OpenCPN's internal format on start.

       -unit_test_1:<num>
              Display a slideshow of <num> charts and then exit. Zero or negative <num> specifies no limit.

PLUGIN LOADING

       Plugin  loading  depends  on that the opencpn main program can locate the plugin object file and that the
       plugin can locate it's own data.

       On Linux, the main program searches for plugin .so-files in a library named opencpn/plugins.  By default,
       this path is searched in ~/.local/lib:/usr/local/lib:/usr/lib.  The default search path can be overridden
       by the OPENCPN_PLUGIN_DIRS environment variable.

       On other platforms, all plugin object files lives in a single directory defined at installation.

       A plugin's data directory is a path ending with opencpn/plugins/<plugin_name>.   On  Linux,  this  is  by
       default  searched  in  ~/local/share:/usr/local/share:/usr/share.   This  search  path  is  overridden by
       XDG_DATA_DIRS as defined by  the  freedesktop  spec.   Only  plugins  adapted  for  this  (i.  e.,  using
       GetPluginDataDir()) handles this properly.

       On  other  platforms, the plugin data directories always lives in a common parent defined at installation
       time.

LIBRARY LOADING AND LD_LIBRARY_PATH

       If LD_LIBRARY_PATH exists in the environment opencpn uses it without modifications.

       Otherwise LD_LIBRARY_PATH is set to the same path as from which  plugins  are  loaded,  see  above.  This
       ensures that helper binaries can load possible libraries installed in the same directories as the plugin.

ENVIRONMENT

       OPENCPN_PLUGIN_DIRS
              Plugin load path, see PLUGIN LOADING

       OPENCPN_LOGLEVEL
              Default loglevel if not defined on command line using -l/--loglevel. See the --loglevel option for
              allowed values.

       OPENCPN_FATAL_ERROR
              If defined, displays the message and exits on startup.

FILES

       ~/.opencpn/opencpn.log
              System log file, a useful tool to solve problems.

NOTES

       The support for OPENCPN_PLUGIN_DIRS and XDG_DATA_DIRS was introduced in version 5.0.0. Prior to this, all
       plugins was loaded from a single directory and all plugin data directories had a common parent.

SEE ALSO

       http://www.opencpn.org
       http://www.freedesktop.org

                                                    July 2018                                         Opencpn(1)