To complete one of the Week 4 Trade in the Dockyard challenges, you'll need to visit the Boat Ramp, Coral Cove, and Flopper's Pond! These three places are in different corners of the map, three specific points that you will have to visit. All located in the west of the map, you can, with courage, visit them all in a single game.
For this challenge, you will need to go north of Sweaty Sands, to one of the isolated islands, to find the coral cove there. Easily spotted from afar, all you have to do is head south, east of Holly Hedges, to find Flopper's Pond. once that's done, the coveted boat ramp will be located southwest of Misty Meadows.
As a reminder, it's easier to complete this challenge in Team Rumble, then with respawning, you won't have to worry about dying.