Accelerated Freefall (AFF) (known in Canada as Progressive Freefall) is a method of skydiving training. It has replaced static line progression as the most common method of training skydivers, though static line is still used at many smaller drop zones. This method of skydiving training is called "accelerated" because the progression is the fastest way to experience solo freefall, normally from 10,000 to 14,500 feet "Above Ground Level" (AGL).