When playing as gunner, pilot flight activities does not match what is required out of weaponry selected by the player.
When switched to automatic cannon, the pilot does not slow down and stabilize for gunner to make accurate shots. When switched to "dumb" missiles, the gunner is at the random mercy of the pilot who never aims the vehicle toward the general direction of the targets (indicated by the very pilot himself!). Air to air combat can be difficult, as the pilot never tends to break from his semi-predetermined flight path to allow the gunner to make a "lock" on the enemy aircraft.