From the start of this level, jump in the rowing boat and head towards the large black cargo ship in the distance. This may take a bit of getting used to as it controls badly. This will unlock an achievement for this action.
Once on the cargo ship, head up towards the control room where there are 2 levers to control this ship.
If they are both forward the ship goes forward.
If they are both backward the ship goes backward.
Left lever back, right lever forward turns left.
Left lever forward, right lever back turns right.
Send the ship forward towards the docks. You can't miss it. Once you're relatively close begin turning the ship around so you can position yourself to reverse in. It isn't as hard as the rowing boat, but can't be mildly tricky to align it correctly.
As soon as you have reversed all the way in the achievement will unlock.
Also worth noting that when adjusting the levers I unlocked the Heavy Lifting achievement as it seems to register that I'm carrying something. You can also unlock the Sail Away achievement quickly here by moving backwards and forwards.