Specifications

use the same comm setup for both. To get NMEA output (for use with the Moving Map part of
OziExplorer) you may have to turn it on within the GPS setup, you may also need to specify which
NMEA sentences to output, see your GPS manual for details.
This page covers the various ways a Garmin GPS can connect to a PC and how to configure the GPS
and OziExplorer.
Notes
OziExplorer cannot send maps to any Garmin GPS, the type of maps OziExplorer uses
are not in the correct format required by a GPS.
A Serial Port is also known as a Com Port and both names are used throughout this
document.
Types of Output by Garmin GPS
Upload/Download Data Protocols
- The standard method Garmins use for
uploading/downloading of waypoints, routes and tracks. T he Interface setting in the
GPS must be set to Garmin mode.
N MEA Data
- A standard method of outputting position data. Garmins have an
Interface setting in the GPS to enable outputting of NMEA data. When a Garmin GPS is
outputting NMEA data it cannot do upload/download of waypoints, routes or tracks.
PVT Data
- A method used by Garmin to output position data when the Interface
setting in the GPS is set to Garmin mode. Significantly older Garmin models do not
have the ability to output PVT data. PVT data does not include GPS satellite data so
there is no way in OziExplorer to display satellite information (NMEA does supply
satellite data).
GPX File -
A standard file format for storing GPS data. Usually the GPS connects to the
computer as a mass storage device (disk drive). The waypoint and track data is saved in
GPX file format to the GPS (drive). OziExplorer reads / writes GPX files.
Types of Connections Used by Garmin GPS
Connect to PC using a Serial port
- These models have upload/download capabilities
and can output NMEA data and also PVT data.
Connect to PC using a USB port
Garmin USB -
These models have upload/download capabilities (not the GPS 18
USB) and output PVT data. The Garmin USB GPS drivers must be installed for a
Garmin USB GPS to be able to transfer data. The drivers should have been
supplied on CD with the GPS but is also available for download from
www.garmin.com .
Mass storage device
-
These models connect to a computer as a disk drive and
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OziExplorer Help Contents