An Italian seafood restaurant on the Georgetown waterfront...............which even has a small boardwalk...................

Master clocks............for master masons...........

The United States Naval Observatory (USNO) is one of the oldest scientific agencies in the United States, with a primary mission^[1] to produce Positioning, Navigation and Timing (PNT)^[2] for the United States Navy and the United States Department of Defense. Located in Northwest Washington, D.C. at the Northwestern end of Embassy Row, it is one of the pre-1900 astronomical observatories located in an urban area; at the time of its construction, it was far from thelight pollution thrown off by the (then-smaller) city center. The USNO operates the "Master Clock",^[3] which provides precise time to the GPS satellite constellation run by the United States Air Force. The USNO performs radio VLBI-based positions of quasars with numerous global collaborators, in order to produce Earth Orientation parameters.

Aside from its scientific mission, since 1974, the official residence of the Vice President of the United States has been Number One Observatory Circle, a house on the grounds of the Naval Observatory.

Clocks...............................clock makers.......like Ben Banneker.......who made the USA's 1st clock.........to navigation...........to time and navigation...........a 2nd story air and space exhibit................the official clock is on this...................atomic clocks.........

1. he United States Naval Observatory is one of the oldest scientific agencies in the United States, with a primary mission to produce Positioning, Navigation and Timing for the United States Navy and the United States Department of Defense. Wikipedia
3. Address: 3450 Massachusetts Ave NW, Washington, DC 20392
5. Phone: (202) 762-1467
6. Hours: 

     

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P. Langley was also a major impetus to make telescopes..............to observe the stars.........this is in nw dc.............and where the vice pres. lives..........