Eye4Software Hydromagic

  Hydrographic Survey Software


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Garmin USB GPS Plugin

The Garmin USB GPS Plugin can be used to connect various Garmin handheld GPS models with Hydromagic. Most Garmin GPS models also support NMEA0183 output, but very often the data cable for this is sold seperatly.

Position data from the handheld is also available via the USB port using Garmin's propietary 'PVT protocol'. PVT stands for 'P'osition, 'V'elocity and 'T'ime. This Hydromagic plugin is able to connect to the USB device driver and decode the PVT sentences sent by the Garmin GPS.


Supported Garmin GPS models

Although the list may not be complete, as new models come out on a regular bases, it contains some of the models that can be connected using the Garmin USB plugin:

NOTE: By default the GPS18 series will sent NMEA0183 sentences over the USB port. To switch to PVT mode, you will have to use the propietary $PGRMC1 command. Please refer to the GPS18 users manual for more information.

The Garmin GPSMap series are also supported


Loading the Garmin USB GPS plugin

To load this plugin, open the preferences window by selecting "Preferences..." from the "Options" menu.
In the window that appears, select the "Devices" tab. Next click the "Add..." button.

the devices tab in the preferences dialog

A list of available plugins will be displayed. In this list, select the "Garmin USB PVT plugin for Hydromagic" plugin and click "OK" to load the plugin. Since this device has its own device driver under Windows, no serial port or speed has to be selected, so the plugin is loaded without showing a configuration dialog first.

select the Garmin USB GPS plugin


Unloading the Garmin USB GPS plugin

To unload the GPS heading plugin, open the preferences window by selecting "Preferences..." from the "Options" menu.
In the window that appears, select the "Devices" tab. Next select the "Garmin USB PVT plugin for Hydromagic" and click the "Remove..." button.

Unload the Garmin USB GPS plugin