2x Grenage Launchers:
To understand this, you pretty much have to know the level. When you start, go along the path until it curves to the right. Keep going straigh, sort of along the tree line. Keep going until you see a cabin that's facing mostly towards the trees. You can't miss it. Open th door and kill the officer. A Guard should rush you, but dispose of of him quickly. Pick up the "Large Key" that the officer dropped, as well as the grenade launcher that's in there. Upon exiting the house, go back the way you came, though bearing a little to the right. You should chance upon two cabins facing each other. The one closest to you is guarded by two guards and several fuel cans. Keep going past it to the one at the treeline. Enter it and on the table will be the safe key. Exit the house and kill any guards who fire at you with your pp7. Once you exit the house, run fairly straight and you should se the satellite. Go inside and run up the stairs. Go to the door ahead of you, not to your right. Run in and press "B" on the computer to power down the Communications Dish. Exit the room and run down the stairs and out of the satellite. Once you exit, there should be a path to the left. Turn 180 degrees and follow it till you get to the fenced in area. enter the fenced area and go in the building to your immediate left. Retreive the bunker plans from the safe. Exit the building and take a right when you exit the fenced area so that you're headed towards to the satellite. Keep going straight and you should run off the path. Keep going until you see a clearing on your left where the ventilation tower is. Stay up on the bank and shoot a grenade on top of the tower. This destroys all of the lock on the ventilation tower. Climb up the tower and drop through the opening.