Oil explorer ONGC's 'Olinda Star' oil rig off the coast of Andhra Pradesh has tilted due to the severe cyclone Phethai. ONGC evacuated all 111 crew members from the rig on December 14 and 15 following forecast of Phethai. "Indian Navy provided magnificent support to take experts to the rig," ONGC said, adding the rig is being brought to stability.