Turn to the West and set off along the nearby ropes. Jump to the next rope and use that to quickly to the street level of the nearby bridge. Rush across the street to the far side of the bridge. Ignore any Extremist you encounter and just run straight across the bridge.
Run out through the opening on the opposite end of the bridge onto the wooden beam. Jump just to the left, aiming for the the boat just below you to the left. Keep going to the West along the river. Jump from boat to boat. When you are jumping for the fourth boat, be careful, this can be a tricky jump. Aim for the rudder if nothing else. After that you will pass under a bridge.
Head over to the right, following the dock on the bank of the river. Run through the two people in the front of you and just stay on the bank. A crate will fall in front of you. Just climb on over it. On the other side of that fallen crate you can spot a lift in front of you. Head over to it and use to get a boost up to near street level.
Keep pace with the barge as you run along the side of the wall. You just need to make it to the next bridge to complete this objective. Once on the far side of it another cutscene will run.
- Don't touch the water
- Don't trigger any alarms