I started recording the gear I used each session back in 2004 when I first started using a GPS.
Hundreds of sessions have been logged, and I've divided the data up to include: date of session, fin (length in cm), board width (cm), board type, sail size, sail type, wind average, max speed, efficiency (which is a bit dodgy as I would divide board speed in knots by wind speed in knots), and distance.
Some of this data is irrelevant, but other info can be used to possibly inform future equipment selections.
For example, I average the board width, sail size, fin length and wind strength columns which theoretically should tell me the wind strength I sail in most of the time, and the board width, sail size and fin size I use.
Therefore, I could also say that if I was to have one board, one sail and one fin, then I would choose:
7.0sqm sail / 64cm wide board / 36cm fin / in 17 knots of wind.
This would be a good combo.
However it does not explain why my shed has 6 boards, 7 sails, 7 masts, 5 booms and a trailer...
I just can't help myself.