Best ways to recognize if friendly or enemy aircraft

[fruitbat]

Originally Posted by MiloMorai

Consider the 'dot' to be unfriendly and take appropriate action until you are sure of its ID.

This, but also tracer colour is an excellent give away when entering the combat area, also after many hours, you can begin to recognise the LOD stages of various plane types, some such as the 109 are instantly recognisable.