ATPL: A layer is absolutely unstable if the temperature decrease with height is
Domanda 405, Meteorology - ATPL - Airline Transport Pilot license
| Between 1°C per 100m and 0.65°C per 100m |
| 0.65°C per 100m |
| More than 1°C per 100m |
| Less than 0.65°C per 100m |
