WWII planes didn't have a targetting system, just human eyesight so I guess the developers didn't want to make the game too inaccurate with a complex HUD style targetting system but wanted to make something available so it wasn't too hard to play. If you use Sim mode you have no targetting at all!
true the first target system was developed for korea and it showed u how to lad a target
btw my country keeps raining lol