If, for example, I sail at Pt Henry in the morning and then have a session at Lake Connewarre in the arvo, how do I use the results for the Team Challenge?
Do I just use the session that has the best results? Do I combine results?
You combine results.
Easiest way I've found is to save the datalogger file to card, then remove the trackpoints that aren't for that particular day.
The hard way is to manually figure out which numbers correspond to your best score, and combine the distances. The 5x10 sec number needs a bit of calculator-work if (like me) your fastest 5 runs occurred in different files.
Thanks 
Now I just have to hope for the wind to increase a little this afternoon...
as nebs says but 0 the data logger before your first session, then at the end of the day, it's all in the data logger as 1 file.
And as Elmo says gpsar and real speed will combine the 2 files.
