When mounted on a cart using the Cart Assembler, the Chunk Loader will keep a 3x3 square of chunks immediately surrounding the cart loaded. This can be helpful when the cart is working while the player is not nearby. If the cart is in an unloaded chunk, it won't do any work. It consumes fuel from the cart's engine module while active. The Chunk Loader is activated and deactivated by clicking the button in the Chunk Loader GUI.