U.S. Naval Observatory
- America's official timekeeper, providing accurate spoken time based on the USNO Atomic Clock, GPS, Loran and Omega time information, U.S. time zone conversions, and other pertinent timekeeping information.
- http://tycho.usno.navy.mil/

Surface Combat Systems Center, Wallops Island, VA
- Provide surface combat systems to support Fleet operations, testing, training, engineering, and development in a maritime environment.
- http://www.scsc.navy.mil/