tests to qualify a crew escape system. After a smooth countdown of five hours, the crew escape system, along with the simulated crew module with a mass of 12.6 tonnes, lifted off at 07.00 AM (IST) at the opening of the launch window from its pad at Satish Dhawan Space Centre, Sriharikota. The test was over in 259 seconds, during which the crew escape system along with crew module soared skyward, then arced over the Bay of Bengal and floated back to Earth under its parachutes about 2.9 km from Sriharikota. See also Soyuz T-10-1, a Soyuz mission which ended with the use of the launch escape system References Human spaceflight Safety engineering