As thousands of passengers faced a harrowing time at airports across the country, Civil Aviation Minister Ram Mohan Naidu said in a statement that “we expect that flight schedules will begin to stabilise and return to normal by tomorrow.

Kavach 4.0 features higher location accuracy, improved yard signal information, OFC-based station interface and direct interface to electronic interlocking integration to enhance passenger safety.

IndiGo’s recent struggles have sparked concerns about the airline’s future, with many recalling the downfall of other Indian carriers. The airlines’ current turbulence has reminded many of India’s aviation industry’s pattern over the past 25 years. Time and again, airlines have dominated during their glory years and eventually lost once they collapse. Here are nine airlines that have ceased operations, failed to adapt to changing market conditions and...