Questions on how devices work

[Dinglir]

Placing these questions in the Scenraio Design Section as I really do not know where else to put them

I have been unable to find how the following device attributes relates to anyhing going on in game:

1) Aircraft weapon facing. When, where and how is this used in game?
2) Aircraft Type. How is this used, ie is there a to hit modifier based on target type and Aircraft type "match" (ie Tactical Bomber's are more likely to hit ground targets than Level Bombers)? Is the target type selected based on this attribute (ie is an AT gun more likely to fire on a tank than on an infantry element)?
3) Device Type on Ground elements. As above. What, How, When?
4) HEAT and HVAP. How is it decided if a device (say the RS-82 rocket) uses standard values or one of these to when they hit a target?

[panzer886]

1. I bellieve that this is only a information and is not used actually in the modifier, it shows you only the direction of the fire.
2. From what I understand the tactical bomber (es. Stuka) will be more succesfull in targeting and destroy a AT gun position/mgnest/AFV/as they very precise. The level bomber can do dammage on a arfield or infantry not as much effective on AFV because of the poor precision.