India has reportedly conducted a successful test-firing of the K-4 submarine-launched ballistic missile, at its full range from a submerged platform in the Bay of Bengal off the Visakhapatnam coast.
According to a report by the Indian Express, the K4 missile was launched from a replica of a submarine submerged at a depth of 9m in the water.
Some of the critical parameters concerning the missile were reported to have been met during the exercise.
An anonymous DRDO source was quoted by The New Indian Express as saying: "The K-4 missile was fired at a depressed trajectory.
"Starting from successfully clearing the launch tube and breaking the water surface to stage separation and maintaining the ballistic trajectory, the missile achieved all parameters before zeroing in on the pre-designated target with high accuracy."
Developed by India's Defence Research & Development Organisation (DRDO), the 10m-long two-stage missile has a launch weight of 20t and can hit a target at a distance of 3,500km.
A report by The Diplomat stated that the missile is equipped with a capacity to carry a nuclear or conventional payload of more than 2,000kg.
It features a ringer laser gyro inertial navigation system and can cruise at hypersonic speed with a weaving system in three dimensions while it approaches a target.
According to DRDO officials, the new missile is set to undergo two more developmental trials prior to its test-firing aboard India's indigenously developed ballistic missile nuclear submarine (SSBN) INS Arihant.
DRDO is also reportedly developing the K-5 missile, which is said to have a strike range of more than 5,000km.
This month, India successfully tested the nuclear-capable intermediate range Agni-I ballistic missile off the Odisha coast, as part of a user trial conducted by the Indian Army.