<!-- <help-desc>???</help-desc> --><!-- English: "Show the most relevant command line options" -->
<!-- <verbose-desc>???</verbose-desc> --><!-- English: "Show all command line options when combined with -_help or -h" -->
<!-- <version-desc>???</version-desc> --><!-- English: "Display the current FlightGear version" -->
<!-- <fg-root-desc>???</fg-root-desc> --><!-- English: "Specify the root data path" -->
<!-- <fg-scenery-desc n="0">???</fg-scenery-desc> --><!-- English: "Specify the scenery path(s);" -->
<!-- <fg-scenery-desc n="1">???</fg-scenery-desc> --><!-- English: "Defaults to $FG_ROOT/Scenery" -->
<!-- <fg-aircraft-desc>???</fg-aircraft-desc> --><!-- English: "Specify additional aircraft directory path(s) (alternatively, you can use -_aircraft-dir to target a specific aircraft in a given directory)" -->
<!-- <download-dir-desc>???</download-dir-desc> --><!-- English: "Base directory to use for aircraft and scenery downloads (the TerraSync scenery directory may be specifically set with -_terrasync-dir)" -->
<!-- <language-desc>???</language-desc> --><!-- English: "Select the language for this session" -->
<!-- <restore-defaults-desc>???</restore-defaults-desc> --><!-- English: "Reset all user settings to their defaults (rendering options etc)" -->
<!-- <disable-save-on-exit>???</disable-save-on-exit> --><!-- English: "Don't save preferences upon program exit" -->
<!-- <enable-save-on-exit>???</enable-save-on-exit> --><!-- English: "Allow saving preferences at program exit" -->
<!-- <disable-mouse-pointer-desc>???</disable-mouse-pointer-desc> --><!-- English: "Disable extra mouse pointer" -->
<!-- <enable-mouse-pointer-desc n="0">???</enable-mouse-pointer-desc> --><!-- English: "Enable extra mouse pointer" -->
<!-- <enable-mouse-pointer-desc n="1">???</enable-mouse-pointer-desc> --><!-- English: "(i.e. for full screen Voodoo based cards)" -->
<!-- <disable-random-objects-desc>???</disable-random-objects-desc> --><!-- English: "Exclude random scenery objects" -->
<!-- <enable-random-objects-desc>???</enable-random-objects-desc> --><!-- English: "Include random scenery objects" -->
<!-- <disable-random-vegetation-desc>???</disable-random-vegetation-desc> --><!-- English: "Exclude random vegetation objects" -->
<!-- <enable-random-vegetation-desc>???</enable-random-vegetation-desc> --><!-- English: "Include random vegetation objects" -->
<!-- <disable-random-buildings-desc>???</disable-random-buildings-desc> --><!-- English: "Exclude random buildings objects" -->
<!-- <enable-random-buildings-desc>???</enable-random-buildings-desc> --><!-- English: "Include random buildings objects" -->
<!-- <disable-real-weather-fetch-desc>???</disable-real-weather-fetch-desc> --><!-- English: "Disable METAR based real weather fetching" -->
<!-- <enable-real-weather-fetch-desc>???</enable-real-weather-fetch-desc> --><!-- English: "Enable METAR based real weather fetching (this requires an open internet connection)" -->
<!-- <metar-desc>???</metar-desc> --><!-- English: "Pass a METAR string to set up static weather (this implies -_disable-real-weather-fetch)" -->
<!-- <enable-ai-models-desc>???</enable-ai-models-desc> --><!-- English: "Enable AI subsystem (required for multi-player, AI traffic and many other animations)" -->
<!-- <enable-clock-freeze-desc>???</enable-clock-freeze-desc> --><!-- English: "Do not advance clock" -->
<!-- <enable-auto-coordination-desc>???</enable-auto-coordination-desc> --><!-- English: "Enable auto coordination" -->
<!-- <disable-auto-coordination-desc>???</disable-auto-coordination-desc> --><!-- English: "Disable auto coordination" -->
<!-- <browser-app-desc>???</browser-app-desc> --><!-- English: "Specify path to your web browser" -->
<!-- <prop-desc>???</prop-desc> --><!-- English: "Set property <name> to <value>. <type> can be one of string, double, float, long, int, or bool." -->
<!-- <config-desc>???</config-desc> --><!-- English: "Load additional properties from path" -->
<!-- <units-feet-desc>???</units-feet-desc> --><!-- English: "Use feet for distances" -->
<!-- <units-meters-desc>???</units-meters-desc> --><!-- English: "Use meters for distances" -->
<!-- <json-report-desc>???</json-report-desc> --><!-- English: "Print a report in JSON format on the standard output, giving information such as the FlightGear version, $FG_ROOT, $FG_HOME, aircraft and scenery paths, etc." -->
<!-- <aircraft-desc>???</aircraft-desc> --><!-- English: "Select an aircraft profile as defined by a top level <name>-set.xml" -->
<!-- <show-aircraft-desc>???</show-aircraft-desc> --><!-- English: "Print a list of the currently available aircraft types" -->
<!-- <min-aircraft-status>???</min-aircraft-status> --><!-- English: "Allows you to define a minimum status level (=development status) for all listed aircraft" -->
<!-- <vehicle-desc>???</vehicle-desc> --><!-- English: "Select an vehicle profile as defined by a top level <name>-set.xml" -->
<!-- <fdm-desc n="1">???</fdm-desc> --><!-- English: "Can be one of jsb, larcsim, yasim, magic, balloon, ada, external, or null" -->
<!-- <aero-desc>???</aero-desc> --><!-- English: "Select aircraft aerodynamics model to load" -->
<!-- <model-hz-desc>???</model-hz-desc> --><!-- English: "Run the FDM this rate (iterations per second)" -->
<!-- <speed-desc>???</speed-desc> --><!-- English: "Run the FDM 'n' times faster than real time" -->
<!-- <notrim-desc n="0">???</notrim-desc> --><!-- English: "Do NOT attempt to trim the model" -->
<!-- <notrim-desc n="1">???</notrim-desc> --><!-- English: "(only with fdm=jsbsim)" -->
<!-- <trim-desc n="0">???</trim-desc> --><!-- English: "Trim the model" -->
<!-- <trim-desc n="1">???</trim-desc> --><!-- English: "(only with fdm=jsbsim)" -->
<!-- <on-ground-desc>???</on-ground-desc> --><!-- English: "Start at ground level (default)" -->
<!-- <in-air-desc>???</in-air-desc> --><!-- English: "Start in air (implied when using -_altitude)" -->
<!-- <wind-desc>???</wind-desc> --><!-- English: "Specify wind coming from DIR (degrees) at SPEED (knots)" -->
<!-- <random-wind-desc>???</random-wind-desc> --><!-- English: "Set up random wind direction and speed" -->
<!-- <turbulence-desc>???</turbulence-desc> --><!-- English: "Specify turbulence from 0.0 (calm) to 1.0 (severe)" -->
<!-- <ceiling-desc>???</ceiling-desc> --><!-- English: "Create an overcast ceiling, optionally with a specific thickness (defaults to 2000 ft)." -->
<!-- <aircraft-dir-desc>???</aircraft-dir-desc> --><!-- English: "Specify the exact directory to use for the aircraft (normally not required, but may be useful). Interpreted relatively to the current directory. Causes the <path-cache> from autosave_X_Y.xml, as well as -_fg-aircraft and the FG_AIRCRAFT environment variable to be bypassed." -->
<!-- <materials-file-desc>???</materials-file-desc> --><!-- English: "Specify the materials file used to render the scenery (default: Materials/regions/materials.xml)" -->
<!-- <texture-filtering-desc>???</texture-filtering-desc> --><!-- English: "Anisotropic Texture Filtering: values should be 1 (default),2,4,8 or 16" -->
<!-- <view-offset-desc>???</view-offset-desc> --><!-- English: "Specify the default forward view direction as an offset from straight ahead. Allowable values are LEFT, RIGHT, CENTER, or a specific number in degrees" -->
<!-- <httpd-desc>???</httpd-desc> --><!-- English: "Enable http server on the specified address. Specify the port or address:port to bind to." -->
<!-- <proxy-desc>???</proxy-desc> --><!-- English: "Specify which proxy server (and port) to use. The username and password are optional and should be MD5 encoded already. This option is only useful when used in conjunction with the real-weather-fetch option." -->
<!-- <telnet-desc>???</telnet-desc> --><!-- English: "Enable telnet server on the specified port" -->
<!-- <jpg-httpd-desc>???</jpg-httpd-desc> --><!-- English: "Enable screen shot http server on the specified port (replaced by -_httpd)" -->
<!-- <AV400-desc>???</AV400-desc> --><!-- English: "Emit the Garmin AV400 protocol required to drive a Garmin 196/296 series GPS" -->
<!-- <AV400Sim-desc>???</AV400Sim-desc> --><!-- English: "Emit the set of AV400 strings required to drive a Garmin 400-series GPS from FlightGear" -->
<!-- <atlas-desc>???</atlas-desc> --><!-- English: "Open connection using the Atlas protocol" -->
<!-- <atcsim-desc>???</atcsim-desc> --><!-- English: "Open connection using the ATC sim protocol (atc610x)" -->
<!-- <flarm-desc>???</flarm-desc> --><!-- English: "Open connection using the Flarm protocol, which includes NMEA/GPS and traffic reporting messages" -->
<!-- <garmin-desc>???</garmin-desc> --><!-- English: "Open connection using the Garmin GPS protocol" -->
<!-- <joyclient-desc>???</joyclient-desc> --><!-- English: "Open connection to an Agwagon joystick" -->
<!-- <jsclient-desc>???</jsclient-desc> --><!-- English: "Open connection to a remote joystick" -->
<!-- <native-ctrls-desc>???</native-ctrls-desc> --><!-- English: "Open connection using the FG Native Controls protocol" -->
<!-- <native-fdm-desc>???</native-fdm-desc> --><!-- English: "Open connection using the FG Native FDM protocol" -->
<!-- <native-gui-desc>???</native-gui-desc> --><!-- English: "Open connection using the FG Native GUI protocol" -->
<!-- <native-desc>???</native-desc> --><!-- English: "Open connection using the FG Native protocol" -->
<!-- <nmea-desc>???</nmea-desc> --><!-- English: "Open connection using the NMEA protocol" -->
<!-- <generic-desc>???</generic-desc> --><!-- English: "Open connection using a predefined communication interface and a preselected communication protocol" -->
<!-- <opengc-desc>???</opengc-desc> --><!-- English: "Open connection using the OpenGC protocol" -->
<!-- <props-desc>???</props-desc> --><!-- English: "Open connection using the interactive property manager" -->
<!-- <pve-desc>???</pve-desc> --><!-- English: "Open connection using the PVE protocol" -->
<!-- <ray-desc>???</ray-desc> --><!-- English: "Open connection using the Ray Woodworth motion chair protocol" -->
<!-- <rul-desc>???</rul-desc> --><!-- English: "Open connection using the RUL protocol" -->
<!-- <failure-desc>???</failure-desc> --><!-- English: "Fail the pitot, static, vacuum, or electrical system (repeat the option for multiple system failures)." -->
<!-- <fpe-desc>???</fpe-desc> --><!-- English: "Abort on encountering a floating point exception;" -->
<!-- <fgviewer-desc>???</fgviewer-desc> --><!-- English: "Use a model viewer rather than load the entire simulator;" -->
<!-- <trace-read-desc>???</trace-read-desc> --><!-- English: "Trace the reads for a property;" -->
<!-- <trace-write-desc>???</trace-write-desc> --><!-- English: "Trace the writes for a property;" -->
<!-- <log-level-desc>???</log-level-desc> --><!-- English: "Specify which logging level to use" -->
<!-- <log-class-desc>???</log-class-desc> --><!-- English: "Specify which logging class(es) to use" -->
<!-- <log-dir-desc>???</log-dir-desc> --><!-- English: "Log to directory DIR. The special value 'desktop' causes logging to the desktop (OS-dependent location). This option may be given several times, using a different value each time. Inside the specified directory, the written log file is named FlightGear_YYYY-MM-DD_<num>.log, where <num> takes the values 0, 1, 2, etc." -->