Garmin user waypoints

I was looking and found this Garmin page
http://www.garmin.com/support/commProtocol.html
It seems to be the start of the answer to the question
previously asked about transferring waypoints.





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For advanced users desiring to develop their own
custom software applications for communicating with Garmin®
GPS products, this document describes the communication
protocols required for transferring data including
waypoints, routes, and track logs to and from Garmin GPS
products via RS-232 or USB.

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within the documentation or implementation of this
information within your software application.

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Jim Macklin wrote:
I was looking and found this Garmin page
http://www.garmin.com/support/commProtocol.html
It seems to be the start of the answer to the question
previously asked about transferring waypoints.

As far as I know, that is the protocol for handhelds, and I successfully
usd it since it was undocumented. For the panel mount units, this
protocol is unusable and the correct one seems undocumented.