Fleet Air Reconnaissance Squadron 5 (VQ-5) was a former squadron of the U.S. Navy that was established on 15 August 1991. During its short-lived career, it was one of two squadrons assigned in the U.S. Navy to operate the ES-3A Shadow, which was a specialised version of the S-3 Viking used for over-horizon tracking and electronic intelligence.

The Lockheed S-3 Viking is a four-crew, twin-engine turbofan-powered jet aircraft designed and produced by the American aerospace manufacturer Lockheed Corporation. Because of its characteristic sound, it was nicknamed the "War Hoover" after the vacuum cleaner brand.