first of all I would like to say that I am a new user and very impressed from the great job that people here have done.
I was trying the DR plugin which is very useful tool!
Meantime I realized that the distances between the DR points (in gpx file that creates) are difference than it should be expected.
To be more clear I give below the following example:
Interval: 6 hours
Speed: 5 Knts
Normally it should be expected the distances between DR points to be exactly 30nm.
The DR gpx files shows a fluctuation of distances (it depends of what distance of DR points measure) from 30.04nm up to 30.12nm for a total route
distance of 2500nm.
Is something I am missing???
I would really appreciate if someone could give me a answer.