the ST60, when connected to the ST60 Tridata or ST60 speed log WILL indicate TRUE WIND speed and direction, as well as APPARENT wind and direction.
Happily, we have an ST60 speed log.
The ST60 mainly measures apparent wind only and calculates true by compting boat speed..IT DOES NOT NEED a compass connected to it..
I guess my mad math skillz are
rusty, because you and CalypsoP35 are correct--something I could've determined from a trivial bit of research. For example: True and Apparent Wind Speed Calculator
However: By "true wind direction," I meant as a compass heading. Wind compass heading is another thing, as CalypsoP35 noted. The ST60 device doesn't provide for that, in any event, and the necessary addition/substraction even I
should be able to handle
Thanks, Alex, everybody else!