1. Destroy the radio
2. Activate the lighthouse
O b j e c t i v e 1:
Grab the 100 health in the first open doorway and enter the door to the left of the entrance. Three guards and your objective are located in there. Toss in a grenade, shoot those that don't get any (haha you perv's). Destroy the radio.
O b j e c t i v e 2:
Some guards might hear you and come running down the hall, if they do blow them back to the cave from which they came. There are a few doors and another hallway to be explored, but those only offer enemies to kill and binoculars. So if you don't want to waste your time, go down the main hall and turn right, and head down with the elevator. When presented with the option to press down again DO NOT. There are a ton of mechanics and guards down there, and two on the floor your on. Pick off as many you can from above, using the crates as cover, then go down again and kill off the rest. There's a health in the office below. Get it if you want, then move on out to the road.
Ahh...the nice peaceful sound of the ocean accompanied by savage gunfire...doesn't it just make your day? Take out the two guards around the second corner. There are some sentries in the distance who are near the lighthouse, try and get what you can, but otherwise crouch near the mini wall and advance towards the lookout tower. You should be attracting heavy fire, so do try and stay low.
Fight your way towards the lookout tower and use it to take out the remaining guards. Then go into the lighthouse and move up the stairs(there is a 50 or 100 health under the stairwell...can't remember which). Up top there's some idiot throwing grenades at himself. If he didn't already kill himself, do so and flip the switch.
O b j e c t i v e 3:
Make your way back down to the bottom to the peephole facing the outside entrance. There is a truck of backup crew in the short distance, so shoot out the engine when it gets close enough to see from your peephole and take out all remaining. Once that's over, get outside and turn right. Your rides here. Level complete.