Question about recorded speed in kml file from Kenwood TH-D72a gps logger

[KK4MCA]

I recently purchased the Kenwood TH-D72a which has gps and its been excellent so far. When using gps, Im particularly interested in speed. Ive tested the unit using a car, walking etc and the mph displayed on screen seems to be pretty accurate and reliable. I use Kenwood's MCP-4A software to read logged data and to create a .kml file, which seemingly works fine-however:

My problem is that the recorded speed shows a VERY high rate of speed in knots. For example, on a kayaking trip today the logged speed in the kml file shows anywhere from 37Knot to 350Knot. Which was certainly not the case! My hunch is that either the speed is being inaccurately recorded or perhaps the numbers need to be adjusted. I could be way off base, but it seems that if I convert the number to hundredths, the speed may be accurate. For example, 350Knot converted would be 3.5Knots (~4mph) which is about right for my top kayaking speed. I plan to do more of a formal test in the car tomorrow.

Any suggestions or insights here?

Thanks!
-Michael
KK4MCA

[K8ERV]

Paddle slower?

TOM K8ERV Montrose Colo

[KK4MCA]

LOl

So I did a test on the interstate today. As usual, the onscreen speed was dead on, top speed was 70mph. However, unfortunately the kml file showed a top speed of 276Knot, so that rules out my 'convert to hundredths' theory.

So it it seems to me now that the speed is being inaccurately recorded. Thoughts? Ill write the company as well.

Thanks!