NaviGPS GT-11/BGT-11 Download (navilink)
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## NaviGPS GT-11/BGT-11 Download (navilink)

This format can...

- read and write waypoints

- read and write tracks

- read and write routes

This format has the following options: nuketrk, nukerte, nukewpt, nukedlg, datalog, power_off .

GPSBabel supports the Navilink protocol used by the Locosys GT-11 and GT-31 GPS receivers. These are sold under a variety of names including:

NaviGPS | BGT-11 | Amaryllo
NaviGPS-BT | GT-31 |
GT-11 | BGT-31 |

This format is used for both the serial protocol used on the USB link and for the files which can be copied from the internal memory to the SD card using recent firmware versions.

If you specify a serial port for the file (.e.g. "COM1", "/dev/ttyUSB0") to be read or written, GPSBabel will use the serial protocol. Specifying a file, either on local filesystem or on a mounted flash card reader, will results in the file-based format being used.

To access the device using the serial protocol over USB the device needs to be in Navilink mode, which can be activated from the main menu of the device.

Details of the Navilink serial protocol can be found here.

### `nuketrk` option

Delete all track points.

This option erases all track data in the receiver before or after doing the transfer, depending on whether track data is sent to or received from the device.

This is a convenient option to use in automated processes where you want to ensure the units starts with a clean state before sending track data to it, or if you want to clear the device after receiving the track data.

### `nukerte` option

Delete all routes.

This option erases all routes in the receiver before or after doing the transfer, depending on whether routes are sent to or received from the device.

This is a convenient option to use in automated processes where you want to ensure the units starts with a clean state before sending routes to it, or if you want to clear the device after receiving the routes.

### `nukewpt` option

Delete all waypoints.

This option erases all waypoints in the receiver before or after doing the transfer, depending on whether waypoints are sent to or received from the device.

This is a convenient option to use in automated processes where you want to ensure the units starts with a clean state before sending waypoints to it, or if you want to clear the device after receiving the waypoints.

### `nukedlg` option

Clear the datalog.

This option clears the datalogger in the receiver after doing the transfer.

This is a convenient option to use in automated processes if you want to clear the device after receiving the data logger contents.

### `datalog` option

Read from datalogger buffer.

This option transfers the contents of the unit's data log. The data is downloaded as a single track.

Only reading of the data log is supported, and you must use the `-t` option to receive any data.

### `power_off` option

Command unit to power itself down.

This options powers down the Navilink receiver once any transfers are complete.

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