The term most commonly refers to a large, crewed, autonomous vessel. It is also sometimes used historically or colloquially to refer to remotely operated vehicles and robots, as well as medium-sized or smaller vessels, such as the midget submarine and the wet sub.
Alexandria is part of Virginia's 8th congressional district, represented by Democrat and Alexandria resident Don Beyer, elected in 2014. The state's senior member of the United States Senate is Democrat Mark Warner, elected in 2008.
It is the 7th largest and highest-income independent city in Virginia. A portion of adjacent Fairfax County is named Alexandria, but it is under the jurisdiction of Fairfax County and separate from the city; the city is sometimes referred to as the City of Alexandria or Alexandria City to avoid confusion.