The Indian Army’s Strategic Forces Command (SFA) has successfully test-fired Agni-IV, the nuclear-capable strategic ballistic missile, from Abdul Kalam Island.

As part of a user trial, the missile was flight-tested from launch complex-4 of the island’s integrated test range (ITR).

The surface-to-surface Agni-IV missile is a two-stage weapon system, which can hit a target at a distance of 4,000km.

"The sophisticated surface-to-surface missile is equipped with modern and compact avionics."

The 20m-long missile weighs 17t, and is installed with a fifth-generation on-board computer and distributed architecture.

Speaking to the Press Trust of India (PTI), Defence Research and Development Organisation (DRDO) sources said: "The sophisticated surface-to-surface missile is equipped with modern and compact avionics to provide a high level of reliability."

The Agni-IV missile includes guidance and correction features for in-flight disturbances.

A ring laser inertial navigation system (RINS) and micro navigation system (MINGS) enable the missile to reach its target within two-digit accuracy.

The missile’s heat shield can withstand temperatures of around 4,000°C, allowing interior avionics to function normally at a temperature less than 50°C.

In December 2014, the army successfully conducted the first user trial of the Agni-IV from Wheeler Island.

The first two Agni-IV developmental launches were conducted from the same location in November 2011 and September 2012.

In April, SFA successfully test launched the nuclear-capable Agni-III surface-to-surface missile.