Naval Facilities Engineering Systems Command

The Naval Sea Systems Command (NAVSEA) is the largest of the United States Navy's five "systems commands," or materiel (not to be confused with "material") organizations. From a physical perspective, NAVSEA has four shipyards for shipbuilding, conversion, and repair, ten "warfare centers" (two undersea and eight surface), the NAVSEA headquarters, located at the Washington Navy Yard, in Washington D.C., and other locations in 15 states and 3 overseas continents. NAVSEA's primary objective is to engineer, build, buy, and maintain the U.S. Navy's fleet of ships and its combat systems. NAVSEA's budget of almost $30 billion accounts for nearly one quarter of the Navy's entire budget, with more than 80,200 personnel and 150 acquisition programs under its oversight.

Trieste is a Swiss-designed, Italian-built deep-diving research bathyscaphe which reached a record depth of about 10,911 metres (35,797 ft) in the Challenger Deep of the Mariana Trench near Guam in the Pacific. On 23 January 1960, Jacques Piccard (son of the boat's designer Auguste Piccard) and US Navy Lieutenant Don Walsh achieved the goal of Project Nekton. It was the first crewed vessel to reach the bottom of the Challenger Deep.

The National Museum of the United States Navy, or U.S. Navy Museum for short, is the flagship museum of the United States Navy and is located in the former Breech Mechanism Shop of the old Naval Gun Factory on the grounds of the Washington Navy Yard in Washington, D.C., United States. The U.S. Navy Museum is one of ten official Navy museums, and is part of the Naval History & Heritage Command, the official history program of the United States Navy.

The Commandant's Office in the Washington Navy Yard, also known as Building One, Quarters J, or the Middendorf Building is the U.S. Navy's oldest active office building, which historically housed the offices of the Commandant and other officers of the Washington Navy Yard in Washington, D.C. It sits at the south end of Dahlgren Avenue, the Yard's main road, two blocks south of the Latrobe Gate near the Anacostia River. After a renovation in 1993, it became offices for the Naval Historical Center. Since 2005, the building has been restored to its historical use as the office of the Commandant. It was likely built from 1837 to 1838 and first appeared on a Yard map in 1842. In 1973 it was listed on the National Register of Historic Places.

Naval District Washington is one of eleven current naval regions responsible to Commander, Navy Installations Command for the operation and management of Naval shore installations in the Washington D.C. Metropolitan Area. The Commandant is currently the only remaining Naval Districts from the 1900s era, making it, by default the oldest of the current naval regions. The Commandant is headquartered at the Washington Navy Yard only a few yards away from the Commander, Navy Installations Command headquarters.

The Washington Navy Yard labor strike of 1835 is considered the first strike of federal civilian employees. The strike began on Wednesday July 31, 1835, and ended August 15, 1835. The strike supported the movement advocating a ten-hour workday and redressing grievances such as newly imposed lunch-hour regulations. The strike failed in its objectives for two reasons, the Secretary of the Navy refused to change the shipyard working hours and the loss of public support due to the involvement of large numbers of mechanics and laborers in the race riot popularly known as the Snow Riot or Snow Storm.

The Washington Navy Yard (WNY) is the former shipyard and ordnance plant of the United States Navy in Southeast Washington, D.C. It is the oldest shore establishment of the U.S. Navy. The Yard currently serves as a ceremonial and administrative center for the U.S. Navy, home to the Chief of Naval Operations, and is headquarters for the Naval Sea Systems Command, Naval Reactors, Naval Facilities Engineering Systems Command, Naval History and Heritage Command, the National Museum of the United States Navy, the U.S. Navy Judge Advocate General's Corps, Marine Corps Institute, the United States Navy Band, and other more classified facilities. In 1998, the yard was listed as a Superfund site due to environmental contamination.

The Navy Department Library is the official library of the United States Department of the Navy. Located at the Washington Navy Yard in Washington, D.C., it is a part of the Naval History and Heritage Command.

The Officers Quarters are fifteen residences located in eight historic buildings in the Washington Navy Yard. Each individual residence is labelled with a single letter such as Quarters A or Quarters B. They were built at different times but continue to serve as housing for senior officers of the United States Navy.

Tingey House, officially known as Quarters A, is the official residence of the Chief of Naval Operations of the United States Navy. Built in 1804, it is located at the Washington Navy Yard in Washington, D.C., and is part of the Yard's historic Officers Quarters. The residence is known as Tingey House in honor of its first resident, former U.S. Navy officer Thomas Tingey. According to popular legend, Tingey's ghost haunts the property.

The Latrobe Gate (also known as Main Gate, Washington Navy Yard) is a historic gatehouse located at the Washington Navy Yard in Southeast Washington, D.C. Built in 1806 and substantially altered in 1881, the ceremonial entrance to the U.S. Navy's oldest shore establishment is an example of Greek Revival and Italianate architecture. It was designed by the second Architect of the Capitol Benjamin Henry Latrobe, whose works include St. John's Episcopal Church, the Baltimore Basilica, and the United States Capitol. The Latrobe Gate is one of the nation's oldest extant examples of Greek Revival architecture. It was added to the National Register of Historic Places on August 14, 1973, and is a contributing property to the Washington Navy Yard's status as a National Historic Landmark.

The Washington Navy Yard shooting occurred on September 16, 2013, when 34-year-old Aaron Alexis fatally shot 12 people and injured three others in a mass shooting at the headquarters of the Naval Sea Systems Command (NAVSEA) inside the Washington Navy Yard in southeast Washington, D.C. The attack took place in the Navy Yard's Building 197; it began around 8:16 a.m. EDT and ended when police killed Alexis around 9:25 a.m. It is the deadliest mass shooting in Washington, D.C. history, as well as the second deadliest mass murder on a U.S. military base, behind the 2009 Fort Hood shooting.