B&G Network Tack - Manual (Page 7)

HB-0522-01 7
USING THE TWA KEY
Press the TWA key to display True Wind Angle on the LCD.
The LCD TRUE legend will be displayed.
If boat speed data is not available the LCD digits will be
blank and the TRUE legend will be displayed.
USING THE VMG KEY
Press the VMG key to display Velocity Made Good on the
LCD. The LCD V legend will be displayed.
If boat speed data is not available the LCD digits will be
blank and the V legend will be displayed.