 | HY-1 Credit - © Mark Wade
| Anti-ship missile. Year: 1970. IOC: 1970. Country: China. Department of Defence Designation: CSS-C-1. ASCC Reporting Name: Scrubbrush. Alternate Designation: SY-1. The first test launch was made in December 1966, but failed due to radar system problems. The second test did not come until three years of redesign and tests were completed, in October 1970. Derivative of Soviet P-15 Styx. HY-1 is coastal defense version, SY-1 is the ship-launched version. Location: Exective-Third Research Academy; Sales-China National Precision Machinery Import & Export Corp. Total Mass: 2,270 kg (5,000 lb). Core Diameter: 0.76 m (2.50 ft). Total Length: 5.80 m (19.00 ft). Span: 2.41 m (7.90 ft). Standard warhead mass: 400 kg (880 lb). Maximum range: 40 km (24 mi). Boost Propulsion: Solid rocket. Cruise Propulsion: Storable liquid rocket. Guidance: Active Radar Homing. Model: SY-1. Anti-ship missile. Country: China. Department of Defence Designation: CSS-N-2. ASCC Reporting Name: Silkworm. Ship-launched version. HY-1 Chronology 1965 April 1 - Launch Vehicle: HY-1. - HY missile development Nation: China. Shenguan is authorised to develop and produce a missile based on the Soviet P-15 ('Styx') cruise missile (later designated Haiyang).
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