Contrail avoidance illustrates the central challenge of aviation decarbonisation: a measure may be scientifically promising while still demanding careful operational integration.
The operational proposition
The concept is to avoid ice-supersaturated regions where persistent contrails are likely to form. In practice, this requires sufficiently accurate weather and humidity forecasts, flight-planning integration and rules for balancing climate benefit against additional fuel burn.
What must mature
- Forecast confidence and uncertainty management
- Air traffic management coordination
- Airline decision criteria and post-flight verification
- Methods for comparing CO₂ and non-CO₂ effects
The most credible programmes will treat contrail avoidance as a controlled operational capability, not a single optimisation switch.