Raymarine Marine GPS System - Manual (Page 154)

Advanced Navigator Functions
5-63
The Downwind Plot screen (Figure 5-20) calculates the best angle and
boat speed when sailing downwind and displays:
•
Velocity Made Good relative to True Wind Angle – click
Vmg to view, then select the True Wind Speed range to plot
by clicking on the Tws (kts) up/down arrows or by entering
numbers directly.
•
Boat Speed relative to True Wind Speed – click Bsp to view.
•
True Wind Angle relative to True Wind Speed – click Twa to
view.
Figure 5-20. Downwind Plot Screen