CY - 1 The CY - 1 ( Chang Ying 长樱 , " Long Tassel " , often erronesously referred as " Chian Yu " , 劍魚 , 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 . 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 . Though originally tested onboard Luda class missile destroyers and Jiangwei class missile frigates , the CY - 1 can be carried by any surface combatant with C - 801 / 802 / 803 launchers , from which the CY - 1 can be launched , thus increasing the versatility and reducing the cost . In addition , a version is further modified so that it can be launched from torpedo tubes of submarines like the C - 801 , but there is not any confirmation that this version has entered the service . In an effort to boost possible export , the CY - 1 has also been modified to carrying a various range of light torpedoes , such as that of USA , Italy , and Russian . However , there is no known export as of 2007 . The CY - 1 is also known to have been tested on the Type 039 submarine . CY - 2 . CY - 2 ( 长樱 - 2 ) is a development of CY - 1 , and it is based on C - 802 missile , sharing the same turbo jet engine . The missile is in limited service in Chinese navy after numerous tests , the last of which was the test of the air - launched version , which was successfully completed by Harbin SH - 5 in 1994 . The major improvement is the range of this weapon is tripled to , but the speed is reduced to subsonic level from the 1 . 5 Mach of CY - 1 . Just like the way CY - 1 can be stored and launched from the container / launcher of C - 801 , CY - 2 can be stored and launched from the container / launcher of C - 802 . The publicized data for CY - 2 includes : Although a development of CY - 1 , CY - 2 is not exactly the replacement of CY - 1 and the two are used concurrently by the Chinese navy . One of the reason is that due to space limitation , most of the light surface combatants of the Chinese navy cannot accommodate the large complex sonars on board larger warships . The range of smaller sonars on these light surface combatants of in Chinese navy is less than that of CY - 2 , and thus the longer range of CY - 2 can not be fully exploited if it is on board these smaller surface combatants . As a result , CY - 1 remains on board submarine chasers where rocket propelled ASW torpedoes ( or ASW rockets ) are deployed , while CY - 2 is often deployed on larger warships . Another reason for keep CY - 1 in the inventory is that CY - 1 can be put away and stored like a log without maintenance for sometime , but CY - 2 requires periodically maintenance in storage . Just like CY - 1 , CY - 2 is also frequently but erroneously referred as an ASW missile , while in reality it is not , because there is not any guidance at the stage of aerial flight . Developer has claimed that CY - 2 can also be armed with a depth charge instead of a lightweight torpedo , but there is no indication of such version has ever entered Chinese service . There are claims of CY - 2 being test fired by Chinese submarines , but there is no confirmation that CY - 2 has been deployed on Chinese submarines due to lack of information . CY - 3 . The latest member of Chinese CY - series ASW weaponry is CY - 3 ( 长樱 - 3 ) , which is a development of CY - 2 . Like CY - 2 , CY - 3 can be launched from a variety of platforms , including aircraft , surface ships , submarines , land vehicles , and coastal shore batteries . However , despite the successful completion of the development and receiving state certification for service , only very limited number are in service with Chinese navy , mostly for long term evaluation purposes . CY - 3 is facing stiff competition from another Chinese missile CJ - 1 , which is also under Chinese naval evaluation , and the final selection has not been decided yet . CY - 3 is basically a CY - 2 with one - way data link added , so that targeting information can be received from platforms such as aircraft and surface ships . This is considered helpful when targeting information is changed after the weapon is launched , as in the case of the targeting information being updated : Several attack plans are pre - programmed in the computer on board the torpedo carried by the weapon , and when target update occurs , the new information is passed on the weapon , so that the torpedo carried can switch to the best attack plan from the original one selected prior to the update .