Question: 601 Lobos is a squadron of the Portuguese Air Force that operates an aircraft that is easily distinguished by its distinctive tail stinger or "MAD Boom", used for what?
Sentence (from "Lockheed P-3 Orion"): The Lockheed P-3 Orion is a four-engine turboprop anti-submarine and maritime surveillance aircraft developed for the United States Navy and introduced in the 1960s.
Relevant evidence: Yes