ATPL: In an Airborne Weather Radar that has a colour cathode ray tube (CRT) increasing severity of rain and turbulence is generally shown by a change of colour from:
Domanda 187, Radio Navigation - ATPL - Airline Transport Pilot license
| Green to yellow to red |
| Yellow to orange to red |
| Green to red to black |
| The frequencies employed are too high to give returns from moisture sources |
