CMNDR Navy Region Mid Atlantic (U.S. Navy) The Commander, Navy Region Mid-Atlantic (CNR MIDLANT) is a U.S. Navy organization responsible for providing naval forces and support to the mid-Atlantic region. This region encompasses thirteen states along the eastern seaboard of the United States, from New York down to Florida, including the District of Columbia and Puerto Rico. The CNR MIDLANT oversees a wide range of operational, training, and logistical activities for the U.S. Navy within its area of responsibility. It also maintains close relationships with regional civilian authorities and other military branches to ensure coordinated responses during emergencies or crises.