Chennai, March 16 -- The Cryogenic Upper Stage engine of ISRO's LVM3 launch vehicle was flagged off to SHAR Range, Sriharikota, on Saturday for the upcoming launch of US satellite Blue Bird-2 that would enable individuals to make calls using smartphones from space.

In an update on Sunday, ISRO said Chairman Dr V Narayanan flagged off the Cryogenic Upper Stage (C25) of ISRO's LVM3 launch vehicle on March 15, 2025, from the ISRO Propulsion Complex (IPRC), Mahendragiri in Tamil Nadu, to the launch complex at Sriharikota.

Directors of ISRO Propulsion Complex (IPRC), Liquid Propulsion System Centre (LPSC), and Satish Dhawan Space Centre (SDSC SHAR) also participated in the flag off ceremony.

This stage has been integrated at IPRC an...