OVERVIEW: The Yu‑11 is a Chinese lightweight acoustic‑homing torpedo introduced in the 2010s. It serves as the principal anti‑submarine weapon of PLAN surface ships, helicopters, and maritime patrol aircraft.

DETAILS: “Yu” (鱼) denotes “fish” in Chinese torpedo nomenclature; “11” is its series identifier. The Yu‑11 entered service in the 2010s and was publicly identified in July 2015. Measuring approximately 3 m in length with a 324 mm diameter, it employs a pump‑jet propulsion system, which reduces acoustic signature and allows operation below 600 m depth. Its guidance is confirmed as active/passive acoustic homing only.

TYPE: Lightweight Anti‑Submarine Warfare Torpedo

FUNCTION: Launched from surface vessels, helicopters, or maritime patrol aircraft, the Yu‑11 uses its onboard acoustic seeker to detect and engage submarines underwater. Its pump‑jet propulsion enhances stealth by minimizing noise.

NOTE:
IOC: 2010s (publicly identified in 2015)
Manufacturer: China Shipbuilding Industry Corporation (CSIC)
Operators: China
Platforms: Surface vessels, helicopters, maritime patrol aircraft

SOURCE:
Wikipedia: https://en.wikipedia.org/wiki/Yu-11_torpedo ; Military Periscope overview: https://www.militaryperiscope.com/weapons/naval-minestorpedoes/torpedoes/yu-11-lightweight-torpedo/overview/ ; The National Interest “Here’s Everything We Know About the Torpedoes…” March 2020: https://nationalinterest.org/blog/buzz/heres-everything-we-know-about-torpedoes-used-chinese-navy-137747/