Somewhere I would like to be !!!
Yes, SailFreeGps only propose to display information from 30s to 20minInteresting, I downloaded it and took a quick look at the features. I like the graphing feature to measure performance. I played with the settings a bit and it seems the longest graphing period is over a 20 minute period?
It would be nice if it had (or maybe it does) a logging feature so you could save and analyze the data at a later date.
I won't get a chance to field test it until next week end. I will try and report back after testing it out.