Air traffic safety electronics personnel (ATSEP) are personnel proven competent in the installation, operation and/or maintenance of communications, navigation, surveillance/air traffic management (CNS/ATM) systems. Minimum entry requirement for ATSEP is a National Diploma in Electrical Engineering (Light current / Computer System). According to ICAO Document 10057, training of ATSEP must be organized in phases as shown below. This training should also be aligned to the training objectives outlined in this document for compliance and optimal competency.

• Phase 0: Selection: The selection process is not a training phase. However, this is the phase where an ANSP is required to select candidates in line with ATSEP profiles and activities.
• Phase 1: Initial training: Initial training is designed to provide underpinning knowledge and skills and is delivered in two parts: basic training applicable to all ATSEPs and qualification training specific to ATSEP profiles.
• Phase 2: Unit training: After successfully completing the initial training phase, ATSEPs undergo unit training. This phase is oriented to the activities an ATSEP will perform in a specific environment. Unit training addresses theoretical and practical issues from equipment-specific and/or site-specific perspectives. It includes on-the-job training (OJT). It is in this phase that ATSEP competencies are developed and assessed.
• Phase 3: Continuation training: The continuation training phase is designed to maintain competencies and prepare for system upgrades and/or modifications. It includes refresher, emergency and conversion training. To maintain competency, an ATSEP must go through the continuation training phase.
• Phase 4: Development training: This phase focuses on the development of additional competencies required by a change to or an evolution of an ATSEP’s profile