Ghosts can request EMP attacks from overhead Science Vessels by using the EMP channel of the C-20A's targeting system. When in Sniper Mode, highlight a target by centering it in view. Press the L-Trigger to initiate coordinate information upload. When upload is complete, press R-Trigger to initiate the attack and close the channel. EMP generates a massive, short-ranged electromagnetic pulse, disabling shields and reducing the energy of nearby units.