CY-1

CY-1
Type	ASW weapon
Place of origin	China
Service history
In service	late 1980s – present
Used by	China
Production history
Produced	late 1980s
Specifications
Weight	≈0.6 ton
Length	≈1.2 meter
Diameter	≈0.4 meter
Warhead	light torpedo
Detonation mechanism	Semi-armor-piercing
Engine	rocket motor
Wingspan	1.2 meter
Propellant	solid fuel
Operational range	≈20 km
Speed	supersonic
Guidance system	inertial in flight, passive / active sonar in water
Launch platform	Air, surface & submerged

The CY-1 (Chang Ying 长缨, Long Tassel, often erronesously referred as Chian Yu, 剑鱼, or Swordfish) is a Chinese anti-submarine rocket carried on a variety of surface platforms, including the Luda class missile destroyers and Jiangwei class missile frigates. A series of CY ASW missiles have been developed based on CY-1. To date only a small number of CY-1 is known to have been produced and deployed on trial basis, despite the fact that it had first appeared on the defense exhibitions held in China in the late 1980s.

The CY-1 is believed to similar in operation to the U.S. Navy ASROC. There is little information available regarding the development history, performance, and exact status of the missile, but it is understood that a few of the missiles were deployed on the PLA Navy Type 051 (Luda class) destroyers and Type 052H2G (Jiangwei-I class) frigates. The CY-1 is basically an anti-submarine torpedo of either the ET52 or Yu-7 class, delivered by a ballistic rocket. The delivery vehicle features four small stabilising fins and four control surfaces, and is powered by a solid-fuel rocket motor. The maximum range claimed by the developer was 10 nautical miles (or 18 km).

Based on the limited information released by the manufacturers as well as the Chinese own claim, the CY-1 is not an ASW missile as it is often referred, because one of the requirement for missile is to have guidance in its flight, and this is exactly what CY-1 lacks. The missile is fired into the general direction of the target submarine as an unguided rocket, and the guidance does not kick in until after the payload, namely, the torpedo has entered water. As a result, the official Chinese term of Rocket propelled (ASW) torpedo is a much more accurate description for this weapon. When the payload is a depth charge instead of the torpedo, the weapon is referred as (long range) ASW rocket.