The Navy ship that collided with a Navy submarine in the Strait of Hormuz in March is back under way, the Navy said Wednesday.

The USS New Orleans, an amphibious transport dock ship out of San Diego, left the Arab Shipbuilding and Repair Yard in Manama, Bahrain, Tuesday night after repairs were completed on the ship’s hull, fuel tank and ballast tanks, officials said.

The fast-attack submarine involved in the March 20 collision, USS Hartford, is en route to its home port of Groton, Conn., where it will undergo repairs to its sail, periscope and the port bow plane on the left side of the conning tower.

Engineers from U.S. Naval Sea Systems Command determined that the sub could not be repaired in Bahrain. It headed back to the United States on April 24 after completing sea trials.

The Navy reported 15 sailors from the Hartford were slightly injured in the collision. No one aboard the New Orleans was hurt, but the rupture of the ship’s fuel tank resulted in a 25,000-gallon spill of diesel fuel into the Persian Gulf.

The sub’s commanding officer, Cmdr. Ryan Brookhart, was relieved of command three weeks after the incident and replaced by Cmdr. Chris Harkins.

A safety investigation and probe by the judge advocate general of the incident was completed recently, but those reports won’t be released until they are reviewed by the 5th Fleet command, said Lt. Nathan Christensen, a spokesman for U.S. Naval Forces Central Command/5th Fleet. That review is in progress, but could take three months.

The New Orleans is part of the Boxer Amphibious Ready Group now patrolling the waters in the Middle East. The ships conduct maritime security operations designed to counter piracy, terrorism and smuggling in the region.

The USS New Orleans has around 700 Marines embarked and a permanent Navy crew of approximately 350 sailors.