Final answer:
The Astronomical Data Services website from the U.S. Naval Observatory provides essential online resources for the Air Force and its users at a single location.
Step-by-step explanation:
The tool that provides essential online resources for the Air Force and its users at a single location is the Astronomical Data Services website from the U.S. Naval Observatory. This website offers information about Earth, the Moon, and the sky, along with tables and online calculators. It is a valuable resource for the Air Force and its users to access relevant data and tools.