I don't mind confessing that sometimes my imagination fails me, and the intent of even the most obvious concept or design fails to register in my aging brain.
What is this thing? I like its lines but I cannot tell what it is.
Okay, then. I can tell that the two "outrigger" units are for propulsion, but I'm having difficulty grasping the purpose of that center module.
It's embarrassing when a man of my years needs to be spoonfed sci-fi imagination, but there it is.