On September 11, 2001, "Fire Fighter" along with the rest of the FDNY Marine Units, responded to the terrorist attack on the World Trade Center and took up a station at the foot of Albany Street in Battery Park City and began pumping at her maximum capacity to supply water to landside units fighting fires in the still-standing towers. Following the collapse of both buildings and resultant failure of the majority of the water mains serving lower Manhattan, "Fire Fighter" and the rest of the FDNY Marine Units became the sole source of water for firefighting efforts at Ground Zero, a duty which "Fire Fighter" maintained for a period of three weeks until sufficient repairs were completed on landside water mains to permit her release from what had become her longest emergency response call. Following a shipyard period in 2003 to rebuild her worn-out engines, the "Fire Fighter" resumed her post and continued to respond to marine emergencies, including a gasoline barge explosion in Port Mobil, Staten Island, in February 2003, and to the Crash of US Airways Flight 1549 on the Hudson River in 2009.