I uploaded two pictures to the photo section of this group. They are
screen dumps of a graph showing the same marathon run by my son.

One is the Triax and the second is my excel program that uses the text
data export.

They are both speed vs time, also the distance recored by the nike
watch was 26.7 miles or .5 to much, so I was able to correct the pace.

As all 15 members of this group ( some have to be nike engineers) can
see, the excel graph is 10000% better and gives some good data.

Bob