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NAME

       fgfs - FlightGear Flight Simulator

SYNOPSIS

       fgfs [ option ] ...

DESCRIPTION

       FlightGear  is  a  free, open-source, multi-platform, and sophisticated
       flight  simulator  framework  for  the  development  and   pursuit   of
       interesting flight simulator ideas.

OPTIONS

       --adf=[rotation:]frequency
              Specify  the  initial  ADF  radio  frequency.  Optionally may be
              preceded by a card rotation.

       --aero=name
              Specify aerodynamics model to load.

       --aircraft=name
              Specify aircraft to load.

       --aircraft-dir=path
              Specify the aircraft model directory relative to the path of the
              executable.  This is used for UIUC aircraft only.

       --airport-id=id
              Specify starting postion by airport ID.

       --altitude=value
              Specify   starting   altitude  (in  feet  unless  --units-meters
              specified).

       --atc610x
              Enable atc610x interface.

       --atlas=medium,direction,hz,options,...
              Open an IO connection using the Atlas protocol.

       --bpp=depth
              Specify the bits per pixel for the renderer.

       --browser-app=path
              Specify location of your web browser.

       --callsign=value
              Specify a unique name for multiplayer play.

       --ceiling=value[:thickness]
              Create  an  overcast  ceiling  (feet  above  sea  level).    May
              optionally specify a thickness (feet) which defaults to 2000.

       --com1=frequency
              Set the initial COM1 radio frequency.

       --com2=frequency
              Set the initial COM2 radio frequency.

       --config=path
              Load  additional  properties  from  path.  Multiple instances of
              this option are recognized.

       --control=mode
              Primary control mode (joystick, keyboard, mouse).

       --dme={nav1|nav2|frequency}
              Specify the NAV radio from which to slave the  ADF  or  set  its
              internal frequency.

       --disable-anti-alias-hud
              Disable anti-aliased HUD.

       --disable-auto-coordination
              Disable auto coordination between aileron and rudder.

       --disable-clock-freeze
              Disable clock freezing so that time advances normally.

       --disable-clouds
              Disable cloud rendering.

       --disable-distance-attenuation
              Disable runway light distance attenuation.

       --disable-enhanced-lighting
              Disable enhanced runway lighting.

       --disable-freeze
              Start out in a running state.

       --disable-fuel-freeze
              Disable fuel freeze (enabling fuel consumption).

       --disable-fullscreen
              Disable fullscreen mode.

       --disable-game-mode
              Disable fullscreen game mode.

       --disable-horizon-effect
              Disable celestial body growth illusion near the horizon..

       --disable-hud
              Disable 2D HUD.

       --disable-hud-3d
              Disable 3D HUD.

       --disable-intro-music
              Disable introduction music.

       --disable-mouse-pointer
              Disable extra mouse pointer.

       --disable-network-olk
              Disable Multi-pilot mode.

       --disable-panel
              Disable instrument panel.

       --disable-random-objects
              Disable random scenery objects (buildings, trees, etc).

       --disable-skyblend
              Disable sky blending.

       --disable-sound
              Disable sound effects.

       --disable-specular-highlight
              Disable specular reflections on textured objects.

       --disable-splash-screen
              Disable splash screen.

       --disable-textures
              Disable textures.

       --disable-wireframe
              Disable wireframe drawing mode.

       --enable-anti-alias-hud
              Enable anti-aliased HUD.

       --enable-auto-coordination
              Enable auto coordination between aileron and rudder.

       --enable-clock-freeze
              Enable clock freezing so that time does not advance.

       --enable-clouds
              Enable cloud rendering.

       --enable-distance-attenuation
              Enable runway light distance attenuation.

       --enable-enhanced-lighting
              Enable enhanced runway lighting.

       --enable-freeze
              Start out in a frozen state.

       --enable-fuel-freeze
              Enable fuel freeze (disabling fuel consumption).

       --enable-fullscreen
              Enable fullscreen mode.

       --enable-game-mode
              Enable fullscreen game mode.

       --enable-horizon-effect
              Enable celestial body growth illusion near the horizon.

       --enable-hud
              Enable 2D HUD.

       --enable-hud-3d
              Enable 3D HUD.

       --enable-intro-music
              Enable introduction music.

       --enable-mouse-pointer
              Enable  extra mouse pointer (i.e. for full screen voodoo/voodoo-
              II based cards.)

       --enable-network-olk
              Enable Multi-pilot mode.

       --enable-panel
              Enable instrument panel.

       --enable-random-objects
              Enable random scenery objects (buildings, trees, etc).

       --enable-skyblend
              Enable sky blending.

       --enable-sound
              Enable sound effects.

       --enable-specular-highlight
              Enable specular reflections on textured objects.

       --enable-splash-screen
              Enable splash screen.

       --enable-textures
              Enable textures.

       --enable-wireframe
              Enable wireframe drawing mode.

       --failure=system
              Fail a system on the aircraft.  System  may  be  one  of  pitot,
              static, vacuum, or electrical.  Multiple instances allowed.

       --fdm=name
              Specify  the  flight  dynamics model to use.  Name may be one of
              jsb, larcsim, yasim, magic, balloon, ada, external, or null.

       --fg-root=path
              Specify the root path for data files.

       --fg-scenery=path
              Specify the base path for scenery data.

       --fix=ID
              Specify starting position relative to a fix.

       --flight-plan=file
              Read all waypoints from the specified file.

       --fog-disable
              Disable fog rendering.

       --fog-fastest
              Enable fastest fog rendering.

       --fog-nicest
              Enable nicest fog rendering.

       --fov=degrees
              Specify initial field of view angle (degrees).

       --garmin=medium,direction,hz,options,...
              Open an IO connection using the Garmin GPS protocol.

       --generic=params
              Open connection using the serial port protocol.   See  README.IO
              for details.

       --geometry=WxH
              Specify window geometry (ie. 640x480, 800x600, etc).

       --heading=degrees
              Specify heading or yaw angle (degrees).

       --help, -h
              Show  a brief help message.  Use --verbose,-v for a full listing
              of options.

       --httpd=port
              Start an HTTP server on the specified port.

       --hud-culled
              HUD displays percentage of triangles culled.

       --hud-tris
              HUD displays number of triangles rendered.

       --in-air
              Start up in the air.  This is implied when specifying an initial
              altitude above ground level.

       --joyclient=medium,direction,hz,options,...
              Open an IO connection to an Agwagon joystick.

       --jpg-httpd=port
              Start a screen shot HTTP server on the specified port.

       --lat=degrees
              Specify starting latitude (degrees).

       --log-level=value
              Set  log level for this session (1..5 where 1=verbose, 5=quiet).

       --lon=degrees
              Specify starting longitude (degrees).

       --mach=value
              Specify initial mach number.

       --model-hz=n
              Run the FDM at this rate (iterations per second).

       --multiplay=direction,hz,address,port
              Specify multiplayer communication settings.  Multiple  instances
              allowed.

       --native-ctrls=medium,direction,hz,options,...
              Open  an  IO  connection  using  the  FlightGear Native Controls
              protocol.

       --native-fdm=medium,direction,hz,options,...
              Open an IO connection using the FlightGear Native FDM  protocol.

       --native=medium,direction,hz,options,...
              Open an IO connection using the FlightGear Native protocol.

       --nav1=[radial:]frequency
              Specify  the  initial  NAV1  radio frequency.  Optionally may be
              preceded by a radial value.

       --nav2=[radial:]frequency
              Specify the initial NAV2 radio  frequency.   Optionally  may  be
              preceded by a radial value.

       --ndb=ID
              Specify starting position relative to an NDB.

       --net-hud
              Enable network information in the HUD.

       --net-id=name
              Specify your callsign.

       --nmea=medium,direction,hz,options,...
              Open an IO connection using the NMEA protocol.

       --notrim
              Do  not  attempt  to trim the model when initializing the JSBSim
              FDM.

       --offset-azimuth=degrees
              specify heading to threshhold (degrees).

       --offset-distance=nm
              Specify distance to threshhold (nautical miles).

       --on-ground
              Start up at ground level.

       --opengc=medium,direction,hz,options,...
              Open an IO connect to an OpenGC host.

       --pitch=degrees
              Specify pitch angle (degrees).

       --props=medium,direction,hz,options,...
              Specify an IO device in which to provide an interactive property
              manager.

       --prop:name=value
              set property <name> to <value>.

       --pve=medium,direction,hz,options,...
              Open  an  IO  connection using the PVE (Provision Entertainment)
              protocol.

       --random-wind
              Randomize initial wind parameters.  See also: --wind.

       --ray=medium,direction,hz,options,...
              Open an IO connection to a "RayWoodworth" motion chair.

       --roll=degrees
              Specify roll angle (degrees).

       --rul=medium,direction,hz,options,...
              Open an IO connection using the RUL protocol.

       --shading-flat
              Enable flat shading.

       --shading-smooth
              Enable smooth shading.

       --show-aircraft
              Show a listing of all available aircraft.

       --speed=n
              Run the FDM "n" times faster than real-time.

       --start-date-gmt=yyyy:mm:dd:hh:mm:ss
              Specify a starting date/time with respect to GMT (Greenwich Mean
              Time).

       --start-date-lat=yyyy:mm:dd:hh:mm:ss
              Specify  a  starting  date/time  with  respect to Local Aircraft
              Time.

       --start-date-sys=yyyy:mm:dd:hh:mm:ss
              Specify a starting date/time with respect to your  local  system
              time.

       --telnet=port
              Start  a  telnet  interface  to  the  property  manager  on  the
              specified port.

       --timeofday=value
              Specify a time of day.  Value may be one of dawn, dusk, noon, or
              midnight.

       --time-match-local
              Synchronize time with local real-world time.

       --time-match-real
              Synchronize time with the real-world time.

       --time-offset=[+-]hh:mm:ss
              Specify a time offset with respect to the current time.

       --trace-read=property
              Trace the reads for a property.  Multiple instances allowed.

       --trace-write=property
              Trace the writes for a property.  Multiple instances allowed.

       --turbulence=value
              Specify turbulence from 0.0 (calm) to 1.0 (severe).

       --uBody=value
              Specify  velocity  along the body X axis (feet per second unless
              --units-meters specified).

       --units-feet
              Use feet instead of meters.  Affects other options  as  well  as
              the values displayed by the HUD.

       --units-meters
              Use  meters  instead  of feet.  Affects other options as well as
              the values displayed by the HUD.

       --vBody=value
              Specify velocity along the body Y axis (feet per  second  unless
              --units-meters specified).

       --vc=knots
              Specify initial airspeed (knots).

       --view-offset=value
              Specify  the  default  forward  view direction as an offset from
              straight ahead.  Allowable values are LEFT, RIGHT, CENTER, or  a
              specific number of degrees.

       --verbose, -v
              Show verbose help message.

       --visibility-miles=value
              Specify initial visibility (miles).

       --visibility=value
              Specify initial visibility (meters).

       --vor=ID
              Specify starting position relative to a VOR.

       --wBody=value
              Specify  velocity  along the body Z axis (feet per second unless
              --units-meters specified).

       --wind=DIR@SPEED
              Specify wind coming from DIR (degrees) at SPEED (knots).  Values
              may  be  specified  as  a  range by using a colon separator; for
              example, 180:220@10:15.

       --wp=ID[@alt]
              Specify a waypoint for the GC autopilot.  Multiple instances  of
              this option are recognized in build a route.

ENVIRONMENT

       $FG_ROOT
              Path used to locate data files.

FILES

       ~/.fgfsrc
              Per user configuration file.

       $FG_ROOT/system.fgfsrc
              System-wide configuration file in command line format.

       $FG_ROOT/preferences.xml
              System-wide configuration file in XML format.

       $FG_ROOT/keyboard.xml
              Keyboard bindings.

       $FG_ROOT/Input/Joysticks/
              Joystick bindings.

       $FG_ROOT/mice.xml
              Mouse bindings.

BUGS

       Send bug reports to <flightgear-devel@lists.sourceforge.net>.

SEE ALSO

       fgjs(1)

AUTHORS

       Curt L. Olson, et al.  See Thanks file for a list of contributors.