a configurable robotic apparatus and system is disclosed that is remotely operable in difficult , hazardous , subterranean , or submerged environs . the apparatus merges diverse disciplines to effect inspecting , cleaning , treating , repairing or otherwise maintaining a wide variety of materials and conditions . deployment environments include power , municipal water and wastewater plants , surface and submerged infrastructures , and like industrial applications . extensible and articulating modules , configurable through standardized and interchangeable connectors , provide unique flexibility , scalability and versatility to accommodate a wide range of shapes , surfaces , and obstacles . in - module intelligence and instrumentation eliminates the need for constant manual control through autonomous operation capable of simultaneous optimization and synchronization of multiple work processes , but manual override and remote control is provided to overcome unanticipated limitations . benefits include improved efficiency , cost , and safety over prior art . high - performance , one - pass operation reduces facility downtime while incorporating environmentally responsible debris recovery .