As the author points out in the sibling comment, that's not a containership. It's an FPSO on top of a heavy-lift ship. An FPSO is basically a floating oil refinery, which is what the maze of piping and equipment is for. AFAIA, the vessel itself has no propulsion (which is why it's on top of the heavy-lift ship) and is just a large floating tub—You can't get much simpler than that.