After receiving this mission from Copeland, follow the mission marker to reach the Cascade Radio Tower Ambush Camp. There are human enemies occupying this area so you’ll need to get off your Motorcycle from a distance; otherwise, they’ll immediately be aware of your presence. If that happens, find cover and let them come to you. Pick them off one by one and don’t approach the Camp until you’ve dealt with the initial wave of enemies that are aware for your presence. Don’t forget to mark your targets before going in.
There’s a total of 10 enemies inside the Camp, each with their own positions and patrols. Your crossbow should be able to kill enemies with one shot silently so use that to maintain stealth. There’s a way around the Radio tower fences to the northeast. Circle around there so you can sneak inside the compound, giving you a chance to eliminate the enemies inside stealthily.
Next, you have to Repair the tower’s power supply. Find the generator that needs to be repaired. You’ll need three scraps to repair it completely. There are several scraps scattered around the area in case you don’t have enough.
Finally, you have to find the underground Bunker’s entrance. Head inside the maintenance shed and find the bunker hatch on the floor in front of the shed’s door. Climb down and study the Map to complete the mission.