B&G Deckman - Manual (Page 91)

Chapter 5: Data
5.14
Using either the number box or slider to the right of TWS, you can alter
the true wind speed and Deckman will move the data points along the
surface. In the bottom left of the plot, you can choose either VS or
VMG, allowing you to view either straight boat speed or VMG plotted
against TWA.
The VS-TWS page works exactly the same way, except that you are
only able to adjust values of TWS.
The Averages tab shows you a plot of Deckman’s analysis of which test
is favoured. There is a vertical bar representing each test, with
whichever is highest being favoured. Again here, you can change the
value of TWS at the bottom of the display. In addition, you can use the
controls to the left of the display to make VMC comparisons – select the
VMC box and then enter a value or use the slider to set the angle of the
course off the wind (0 is upwind, 180 downwind).
Figure 5.9