The P-8I Poseidon is a long-range maritime patrol aircraft used by Indian Navy, derived from Boeing's 737, serving as a platform for anti-submarine (ASW) and anti-surface warfare (ASuW), intelligence, surveillance, and reconnaissance (ISR) in the Indian Ocean Region. Nicknamed a "flying destroyer," it features advanced sensors, radars, sonobuoys, and weapons like Harpoon missiles and torpedoes.