The multiple-layer field-complex is a multi-purpose field enclosure that surrounds a spacecraft. Field-complexes could be extended to encompass a volume well beyond normal to encompass and carry other objects, although this negatively affected operating efficiency. A 21st century CE Culture field enclosure included (from innermost layer to outermost) a bumpfield, insulating, sensory, signaling and receptor, energy and traction, hullfield, outer sensory, horizon field.