Groton — The Historic Ship Nautilus and Submarine Force Library and Museum will be closed on Mondays because of the furloughs for civilians who work for the Department of Defense.

The Defense Department is furloughing most of its civilian personnel because automatic spending cuts, known as sequestration, took effect March 1. Under the current plan, employees have to take one day off each week for 11 weeks, from July 8 through the end of the fiscal year.

The Nautilus and the museum will close on Mondays, in addition to its routine closures on Tuesdays, from the week of July 8 until further notice, the Navy said Thursday.

All of the museums that fall within the Naval History and Heritage Command are closing for a day each week because of the furloughs.