Gill, looking at your tracks I see something I don`t understand :
your top 4 100 averages are all faster than your 1sec top speed. This makes no sense to me, as your top speed should show peak speed acchieved over 1sec, should theoretically be higher than any averages over a longer period.
Normally, the peak speed shows up any spikes in your tracks, which once deleted, brings your top speed (1s) down to a realistic level (my highest 1s speed was 65knots, after deleting spikes it was more realistic). Then your longer averages come down to also a more realistic average speed, but peak speeds should always be higher than averages.
I`m assuming you deleted spikes in GPSAR, but even so I can`t understand how 100m averages can be higher than peak speeds. In my head it is simply impossible to have 4 100m long average speeds higher than your all-out top end run. Am I missing something ?