Following the September 11 attacks in New York City, many people were unable to leave Lower Manhattan due to the closure of bridges and tunnels and mass transportation. Within minutes of the first plane hitting the first tower, multiple fireboats from the New York City Fire Department rushed to the scene. The United States Coast Guard coordinated a large convoy of merchant ships, tugboats, and ferries to evacuate the stranded and injured victims.

USCGS Katherine Walker (WLM-552) is a Keeper-class coastal buoy tender of the United States Coast Guard. Launched in 1996, she has spent her entire career homeported at Bayonne, New Jersey. Her primary mission is to maintain 335 aids to navigation in New York Harbor, Long Island Sound, and surrounding waters. She is assigned to the First Coast Guard District.