It is designed as an aid for trainers , assessors and candidates for the APF Accelerated Freefall Instructor endorsement .
It is should be used only in conjunction with a training course conducted by a highly experienced AFF instructor .
It is designed as an aid for trainers , assessors and candidates for the APF Accelerated Freefall Instructor endorsement , and should be used only in conjunction with a training course conducted by a highly experienced AFF instructor .