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The S3V Zagon is a guided but un-propelled depth charge developed by the Russian firm Tactical Missiles Corporation. It was first unveilled at the 1992 MAKS Airshow as part of a marketing effort which resulted in China purchasing the weapon.
The S3V is an aerially deployed weapon, with a parachute system detached at the moment of splashdown. The sonar mounted in the nose is activated upon entering the water, searching for hostile submarines. It directs its control surfaces to maneuver the depth charge toward the target once it is located and identified. The developer has claimed that the S3V is around 1.2 to 1.6 times more effective than conventional unguided depth charges in shallow water (≤ 200 meters) and around 4 to 8 times more effective in deep water (up to 600 meters). The weapon is usually deployed by Tu-142, Il-38 and Ka-27/28 aircraft.
- Length: 1.3 meters
- Diameter: 211 mm
- Weight: 94 kg
- Warhead: 19 kg
- Minimum depth required: 150 meters
- Maximum operational depth: > 600 meters
- Rate of descent: 16.2 meters per second
- Angle of attack/descent: 60 to 90 degrees
- Worst conditions allowed for aerial deployment: sea state 6
- Sonar lock-on radius: 120 meters
- Deployment platform: Fixed and rotary-wing aircraft