The Nirbhay cruise missile development programme was first reported in India in September 2007, but is believed to have started in 2005. The missile has been described as being similar to the US RGM-109 Tomahawk and the Russian Club (SS-N-27), and is being developed by the DRDO in Hyderabad. There are expected to be several versions of the missile, starting with a ground-launched version, and then followed by submarine- and air-launched versions. The Nirbhay missile is believed to have a length of 6.0 m, a body diameter of 0.5 m and a launch weight of 1,500 to 1,600 kg. It is believed to have a payload of 450 kg, which would suggest an HE, submunitions or small nuclear warhead, possibly in the 12 kT range. Guidance is reported to be Inertial Navigation System/Global Positioning System (INS/GPS) with an active radar terminal seeker. The missile is launched using a solid propellant boost motor, which is jettisoned after use, and a turbojet motor takes over for the subsonic cruise and terminal phases. It is believed that assistance has been provided with the turbojet engine by a Russian company, and that this engine is similar to the TRDD-50. A cruise speed of between M0.8 and M0.9 has been reported. The maximum range is believed to be between 800 and 1,000 km. A Transporter-Erector-Launcher (TEL) vehicle is reported to be in development by the Research and Development Establishment (Engineering) at Pune.Unconfirmed reports suggest that flight tests started in 2007, and that the Nirbhay missile