Due to security reasons, de-icing of airplanes is crucial. Ice and snow increase the weight of the airplane and thus have a negative impact on its aerodynamics. Ice detection and quantification on airplanes (especially small airplanes in air traffic) has not been sufficiently solved yet.
There are several de-icing options before and during flight, but are severely limited in functionality. This, of course, has negative effects on energy efficiency and fuel consumption. In general aviation, pilots have to visually inspect and assess ice on the wings and other important parts (for example sensors and air vents). This has to happen not only before, but also during flight.