Below Radar should be a feature at launch

Below radar will help balance the effectiveness of anti-air missiles.

Since flying at low altitude takes far more skill than pointing a launcher in the general direction of an aircraft, below radar should be effective against both infantry and vehicle lockons. This will prevent AA missile spam, while still effectively denying aircraft airspace (i.e. deter aircraft). This will also improve the skill ceiling for dogfights, which will be less reliant on missiles.

Lastly, considering that it is considerably harder to fly low in a jet compared to a chopper, I think we need aircraft-specific below radar distances. I think the distance should be 20 m for agile choppers; 30 m for transport helicopters; about 50 m for jets.