I have an old Garmin GPS 128 installed on my flybridge, with a Standard
Horizon
Data Repeater connected down in the cockpit so I can read distance to waypoint
while fishing (drifting). It seems the Garmin's NMEA data interface only reads
out
in increments of .1 mile instead of the .01 mile resolution displayed on the
GPS
screen. A check with a laptop computer confirms that I can't get DTW data any
better that .1 mile from the NMEA 0183 output.

Now, .1 mile accuracy isn't so good when I am fishing over a sunken ship or
submerged reef. Does anyone know how to get better resolution from the
Garmin, or are they just mean-spirited software engineers? Do any of the new
GPS sets give better resolution in their NMEA data? Manual specifications
are a bit terse on this subject!

Regards,
Cliff

Fishing: "a sport surrounded entirely by liars in old clothes"