Weather Radar and PWS Control Panel
WEATHER RADAR OPERATION - The Weather Radar provides normal weather radar operation plus Doppler detection of turbulence by measuring the velocity of rain droplets moving parallel to the airplane flight path. Turbulence may be displayed in light rain or entirely outside the precipitation area. Although Doppler cannot detect clear air turbulence, it can detect turbulence in the presence of rain lighter than that displayed in the weather-only mode. Turbulence returns and Level 4 and higher storms are displayed in magenta. These areas can be very dangerous.
SYSTEM SWITCH - SYS Switch activates the weather radar for display on the ND in any mode except PLAN whenever the switch is selected to ON.