water like the , the status of the missile is in question because nothing is heard about it entering mass production. The CY-1 ASW missile has a maximum range of 18 km (10 nm). Sensors The main sensor is the medium-frequency sonar mounted in the bow of the submarine, with passive and active modes, which is used for both search and attack. In addition, the system offers a method of underwater communications, and also functions as a torpedo approach warning system. This sonar is the Chinese development of French Thomson-CSF TSM-2233 sonar, and is capable of simultaneously tracking 4 to 12 targets depending on the function it is used for. To enhance passive search capabilities, a low frequency sonar of French Thomson-CSF TSM-2255 design is mounted on the flanks of the hull, with a maximum range in excess of 30 km and capable of simultaneously tracking four targets. The system is further enhanced with the integration of a domestic Chinese passive ranging sonar on board, designated as H/SQG-04 sonar. For surface search, a small I-band radar is fitted. This class is the first Chinese submarine to be fitted with an integrated electronic support measures / radio direction finder / radar warning receiver system designated as SRW209 Submarine Radar Reconnaissance Equipment, which works at S - Ku bands with 100% detection rate. The SRW209 is fully automatic and can be either operated by a single operator with a console with a color CRT (which can be replaced by LCD) display console, or linked to the combat data system, which is capable of tracking multiple targets. Notable incidents On October 26, 2006, a Chinese Song class submarine "popped up" and "surfaced within firing range of its torpedoes and missiles before being detected" within of the carrier while she was operating in the East China Sea between Japan and Taiwan. It was spotted by an F/A-18C aviator and confirmed by the crew of an EA-6B from the Kitty Hawks Air Wing. Export potential - China offered the 039 submarine for sale to Thailand in 2007. However, the Royal Thai Navy lacks the infrastructure to support submarine this time. Thailand later ordered S26T submarine, a export version of the Type 039A . See also People's Liberation Army Navy Submarine Force List of submarine classes in service Hai Lung-class submarine Harushio-class submarine Dolphin-class submarine Walrus-class submarine Upholder/Victoria-class submarine Collins-class submarine Lada-class submarine S-80-class submarine References