True wind statistics have been added to the T1 processor
beginning revision 20.05. These functions are designed to help in
decisions involving laylines, Vmc sailing and sail selection. There are
six parameters displayed in round-robin order.
||The average wind direction over the last hour.
||The persistent shift of wind direction over the last
hour (in degrees/hr). The example reads "wind direction has trended
clockwise (+) 5.1º over the last hour".
||The RMS wind shift (in degrees). The example reads "5º
each way from mean".
||The average true wind speed over the last hour.
||The RMS variability in true wind speed. The example Vt
and Pf together read "true wind has been 12.6 knots ±4.5 knots
in the last hour".
||The highest windspeed (over a 5 second average) and
how long ago it occured (in minutes) during the last hour. The example
reads "highest wind was 17 knots, 15 minutes ago".
These Shift and Puff items are statistical; there are two other
functions that give the current differences in wind direction and speed
from the mean (see Shift and Puff).
Error codes associated with the Statistics output are:
||Not enough data to calculate statistics. After 10 minutes of steady data, this error should go away.
||No wind direction available or unstable conditions. Check your system for boatspeed, apparent wind and heading.
||No tacks. Tacking is required in order to detect wind shear.