Head to Derrick's icon and step into the marker. Take Derrick's boat to the meeting point then follow Kim's boat.
Keep close to the boat because several enemy boats will turn up to shoot at him. Driveby shoot the enemy boats to keep them from killing Kim and Derrick.
After you've taken out a few boats a helicopter will turn up and Derrick will ask you to take it out with a rocket launcher. Follow the on-screen instructions to stand up and aim at the helicopter. Aim a little in front of the helicopter's flight path if it's still moving, as it can take few seconds for your rocket to hit depending on how far you are from the helicopter.
Once the helicopter goes down take out the remaining boats then follow Kim to his final destination.
Go down the steps by the road where you are dropped off to the rusty boat docked on the jetty below. There's a pidgeon perched in the cabin.
Go back up to street level and head northwest along Lampoc Avenue past Burger Shot to just past Worm Street. On the south side of Lampoc there's a junk yard. Snipe the pidgeon on top of the northeast corner of the building at the back of the junkyard.
Next: Tunnel of Death
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