Calub Shavlik at yesterday's GIS User Group meeting wanted to recommend the following enhancement:

DNRGPS can save to *.gpx. However, it would be nice to save it to or open an *.adm file, which is a Garmin format. When it is a *.adm file, our depthfinders can read this data directly, which would get around our current limitation of using the free version of a software program that only allows saving 500 records at a time. This is a big issue when downloading trackfiles with thousands of records.