Tip:  During  the arming phase, equip your Apache helicopter with
radar-guided  AGM-114L  Hellfire  missiles instead of the laser-guided
AGM-114K  Hellfire  II.  The AGM-114L missile is specifically designed
for Lock On After Launch (LOAL) capabilities, which will enable you to
fire  at  ground units from behind cover without exposing the aircraft
to enemy fire.

     Tip:  If  you run out of air-to-air missiles, other weapons, such
as chain guns and guided missiles, can be used against both fixed-wing
and  rotary  aircraft.  Try to engage enemy aircraft from behind cover
and  at the shortest possible range, preferably just ahead or slightly
behind the aircraft using a low-angle deflection shot.