The company lost five key operational personnel when a Pawan Hans helicopter crashed in the Arabian Sea in January.

“Lot of companies world over have a policy of not allowing more than two senior executives flying together. We are also thinking of putting the same policy in operation for our offshore operations,” a senior ONGC executive said.

When on January 13 a Dauphin N3 helicopter, operated by Pawan Hans, crashed off the Mumbai coast, ONGC lost topline operational in-charges of its key Mumbai High oil and gas fields. Two pilots ferrying them to an offshore oil and gas facility were also killed in the accident, the cause of which is still being investigated.

“We lost installation/location managers and maintenance in-charges of Mumbai High North, NQ and Water Injection North (WIN) platforms in the accident,” he said adding a sixth key operational executive had dropped out of the ill-fated flight at the last moment due to ill health.

Any oil and gas field of ONGC is headed by the asset manager and installation or location managers are just below him.

The official said a decision on barring key executives from flying together is likely to be taken soon.

The Dauphin is a medium weight multi-purpose twin-engine helicopter.

Pawan Hans operates seven Dauphin N3 Helicopters for ONGC's offshore operations. These helicopters, based at Juhu airport, Mumbai and Rajahmundry, undertake passenger crew change service and production trips on a regular basis to meet the offshore requirements of the state-owned oil and gas producer.

Pawan Hans is a joint venture between the Government of India owning 51 per cent stake, and ONGC which holds the remaining 49 per cent interest.

As of January 2017, Pawan Hans has a fleet of 46 helicopters. It was incorporated to provide helicopter support services to the oil sector, services in remote and hilly areas, as well as, for charter services. In 2015, a Pawan Hans chopper had crashed off Mumbai High, the country's largest offshore oilfield 176 kilometres off the Mumbai coast. The helicopter, which was conducting night landing practice, was carrying two pilots. Only one body was found.