Final answer:
The support system includes all the equipment used to make an aeronautical system operational in its intended environment.
Step-by-step explanation:
The equipment used to make an aeronautical system or end item operational in its intended environment is called the support system. This includes all the components and tools necessary to maintain and operate the system, such as ground support equipment, maintenance tools, and communication systems.
For example, in the aviation industry, the support system includes items like aircraft ground power units, aircraft tugs, fuel trucks, and air traffic control communication systems. These equipment ensure that the aircraft can function properly and safely in its operational environment.