- **Check for Internet Connection**: Uncheck to allow maps to be used in China/places where map tile downloads are likely to fail (stops the map-tile engine continually rechecking for an Internet connection).
The settings are:
-<spanid="autosave_log"></span>**Save log after each flight**: Telemetry logs (`.tlog`) automatically saved to the _Application Load/Save Path_ ([above](#load_save_path)) after flight.
_QGroundControl_ will automatically use an internal GPS to display its own location on the map with a purple `Q` icon (if the GPS provides a heading, this will be also indicated by the icon).
It may also use the GPS as a location source for _Follow Me Mode_ - currently supported on [PX4 Multicopters only](https://docs.px4.io/en/flight_modes/follow_me.html).
This section allows you to specify the RTK GPS "Survey-in" settings, to save and reuse the result of a Survey-In operation, or to directly enter any other known position for the base station.
The _Survey-In_ process is a startup procedure required by RTK GPS systems to get an accurate estimate of the base station position.
The process takes measurements over time, leading to increasing position accuracy.
Both of the setting conditions must met for the Survey-in process to complete.
For more information see [RTK GPS](https://docs.px4.io/en/advanced_features/rtk-gps.html) (PX4 docs) and [GPS- How it works](http://ardupilot.org/copter/docs/common-gps-how-it-works.html#rtk-corrections) (ArduPilot docs).
In order to save and reuse a base position (because Survey-In is time consuming!) perform Survey-In once, select _Use Specified Base Position_ and press **Save Current Base Position** to copy in the values for the last survey.
The values will then persist across QGC reboots until they are changed.
- **Connect to ADSB SBS server**: Check to connect to ADSB server on startup.
- **Host address**: Host address of ADSB server
- **Server port**: Port of ADSB server
QGC can consume ADSB messages in SBS format from a remote or local server (at the specified IP address/port) and display detected vehicles on the Fly View map.
One way to get ADSB information from nearby vehicles is to use [dump1090](https://github.com/antirez/dump1090) to serve the data from a connected RTL-SDR dongle to QGC.
The steps are: 1.
1. Get an RTL-SDR dongle (and antenna) and attach it to your ground station computer (you may need to find compatible drivers for your OS).
2. Install _dump1090_ on your OS (either pre-built or build from source).
3. Run `dump1090 --net` to start broadcasting messages for detected vehicles on TCP localhost port 30003 (127.0.0.1:30003).
4. Enter the server (`127.0.0.1`) and port (`30003`) address in the QGC settings above.
5. Restart QGC to start seeing local vehicles on the map.
- **Video Source**: Video Stream Disabled | RTSP Video Stream | UDP h.264 Video Stream | UDP h.265 Video Stream | TCP-MPEG2 Video Stream | MPEG-TS (h.264) Video Stream | Integrated Camera
::: info
If no video source is specified then no other video or _video recording_ settings will be displayed (above we see the settings when UDP source is selected).
:::
- **URL/Port**: Connection type-specific stream address (may be port or URL).
- **Low Latency Mode**: Enabling low latency mode reduces the video stream latency, but may cause frame loss and choppy video (especially with a poor network connection). <!-- disables the internal jitter buffer -->
