Beginning March 6 — two and a half years after the Sept. 11, 2001, terrorist attacks on New York and Washington — the Navy Museum will once again be open for business on Saturdays and Sundays from 10 a.m. to 5 p.m.

The museum, which was forced to shutter its doors on weekends due to heightened post-Sept. 11 security measures at the Washington Navy Yard, has reached an arrangement with Navy Yard security to allow visitors to enter on weekends. However, individuals planning to visit then must make reservations to enter the yard by the preceding Friday at noon, by calling (202) 433-6897.

Weekend museum visitors must enter the yard at the gate at Sixth and M streets Southeast.

Photo identification is required, but parking is free. Weekday hours are 9 a.m. to 4 p.m. (until 5 p.m. April 1 to Labor Day).

— Bree Hocking