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.

       -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.

NOTES

       The support for OPENCPN_PLUGIN_DIRS and XDG_DATA_DIRS was introduced in version TBD. 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)