Leave the Katerina's, but before you climb up the ladder you must go right and then down. After using the stairs you find yourself near rubble that is being cleaned up by Youkol. There, you can find Kurk - speak with him (Available brainwidth achievement).
Go to the ladder and, by using the cart, reach the cart's starting point. Exit the cart, walk down from the platform and go to the building on the left. Go through the workshop and exit on the other side - you'll be on the broken pier with tracks, at the end of which awaits Oscar, ready to tug the boat with the tractor. Talk to him (when Oscar mentions the issue of power in the park, which by that time will have been long before solved by Kate, you will get the achievement Tripping).
Through the makeshift bridge that has connected the pier in the meantime, approach the Youkols standing near the ship. Look at the line coiled around the mooring and talk to Bouruth. When the Youkols attach the rope to the tractor, go to the automaton and tell it to start tugging. Unfortunately, this won't work.