The term ATSEP is used to describe “engineering and technical personnel undertaking operational safety related tasks”.

ATSEP training is divided into three phases:

• Initial Training: Training that precedes the System/Equipment Rating Training. It includes Basic Training and Qualification Training.
• System/Equipment Rating Training: Training designed to impart system/equipment-related knowledge and skills leading towards operational competence.

Continuation Training: Training designed to augment existing knowledge and skills and/or to prepare for new technologies. This training is given to operationally competent personnel and it includes Refresher, Emergency and Conversion training.