If the departure path is obstacle free ... in increments to avoid any abrupt loss of lift. Soft field conditions include grass, gravel, mud, sand, or any surface prone to increased rolling ...

Question: If flaps don’t increase lift, then why is a small amount of flaps used in soft-field takeoffs for some aircraft? Answer: Who said flaps don’t increase lift? Flaps do increase lift.

While taxiing for take off on the runway, the aircraft's wheels veered off the tarmac and was stuck in the soft mud in a field beside the runway, the airlines said. "IndiGo flight 6E-757 operating ...