Inadequate advance notice and miscalculations of cyclone Tauktae’s ferocity and its path may have contributed to a false belief that oilfield operations in the Arabian Sea need not be paused, said top sources close to ONGC whose vessels with 700 onboard were struck by the storm. A drillship of Oil and Natural Gas Corporation (ONGC) and three barges of private contractor Afcons working on the state-owned firm’s oilfield went adrift after their anchors gave away in the storm on Monday night.