The Navico C500W With ATM600 gives Apparent Wind Speed (AWS) numerically with the analogue needle showing Apparent Wind Angle (AWA).
When connected to a CORUS system With a Speed Transducer the display can give True Wind Speed (TWS) and Angle (TWA). Wind Speeds can be displayed in: Knots, Melres per second, MPH, & the Beaufort scale.