In one of his last ceremonial duties as the Naval Support Activity’s final commanding officer, Capt. Brian Harrison encased the service’s blue flag in a sock-like sleeve Friday morning, bringing to a close a 110-year naval presence in the Crescent City and an end to his three-year tour as skipper of the installation he knew as a child growing up in Algiers. As a Marine Corps band ensemble played “Auld Lang Syne,’’ a Navy color guard carrying that flag solemnly marched away. And shortly afterward, Lt. Col. Todd Ford and Sgt. Maj. Chris Bloebaum, commanding officer and the highest-ranking of...