Phase 1 Clear the south-west partYou have to use your green beret . Run to the walls west of him (take a look here), [aim mouse, double click] , shoot [g, click] once to attract the guard who is walking at the west part of your map and kill him with your gun [aim mouse, single click three times] .
Phase 2 Get the boat
Use your marine . Run [aim mouse, double click] forward and hide behind the rock in front of you. Fire a shot [g, click] and shoot [aim mouse, single click three times] the guard who will come to take a look (take a look here. ) Further to the north, there is another rock where you can hide. Run [aim mouse, double click] to that spot, fire a shot[g, click] and shoot [aim mouse, single click three times] the two guards who will come to take a look (take a look here.) Get the boat [h, aim boat, double click], dive [go to shallow water, d] and go to the dock where your green beret and driver are waiting. Go to shallow water, surface [d] and inflate [t] your boat. Select all your men [draw a box around them while holding your right mouse button] and send them in the boat [aim boat, double click].
Phase 3 Land your man and `finishing touch'Use your marine  to row your boat the northern island (stay at the west side; take a look at this map. ) Unload your driver [5, press photograph on backpack]. Do the same for your green beret . Run with your driver [5, double click] and hide on the south end of the barracks. (take a look here.) Wait until the patrol walks past you and shoot them down with your machine gun [m, aim mouse, click]. Use your green beret  to kill the machine gunner [x, aim, double click] get a barrel [h, aim, double click] put it near the relay station (point X at this map ) [aim, click, wait until he arrives with barrel, right mouse] run [aim, double click] to a safe distance (point Y at this map ) and shoot [g, aim, click] the barrel.