Press C again to switch to thermal vision,

targeting the four aircraft at the ground airfield
After firing the missiles, you have to keep aiming at the target to hit it. After destroying all of them, two more will appear, again destroy them and wait for new orders. Right click to zoom in and see a few cars and a helicopter at the airport, wait for the attack order and press 3, then press left to mark the enemy's position, within three seconds a bomber will come and take out the enemy, those that are not dead call the bomber again and you're done. Once the targets are taken care of, complete the mission. When you return to the ship, it will be night time, so turn on your night vision system and return to the carrier and pass the level.