Businesses in this category hire out waterborne vessels designed to operate without people on board. These may be remotely controlled or capable of following programmed routes, and can range from small uncrewed surface craft to larger specialist vessels. Hire is generally for a defined period or project, with the customer responsible for operating the vessel unless support is included in the agreement. Typical uses include marine surveys, hydrographic mapping, environmental monitoring, research, infrastructure inspection and trials of maritime technology. Rental may include navigation and control systems, sensors, communications equipment or other mission-specific payloads. Providers may also arrange delivery, setup, maintenance, operator familiarisation and technical support; the scope varies according to the vessel and the intended work.