Is there a way to compare the actual wind (TWD/TWS) as recorded in the Exp log file to the forecast from the grib files as used by Opt routing?   Same question for current.
(Ideally?) Exp would record the TWD/TWS and Set/Drift from the grib files (at the location the boat sails at any given moment) into the Exp log.  This would allow to use strip chart to compare forecast to actual to e.g. identify any structural deviation at a certain sailing spot.  
Or are there other tools do do such an analysis?