The USS Hartford and USS New Orleans collision was a collision between the United States Navy Los Angeles-class submarine USS Hartford and the United States Navy San Antonio-class amphibious transport dock USS New Orleans on 20 March 2009. It occurred in the Strait of Hormuz, between Iran, the United Arab Emirates, and Musandam, an exclave of Oman. Both ships incurred millions of dollars' worth of damage in the collision which required repair in drydock.