---
title: "ATCO.C.035 Application for synthetic training device instructor endorsement — ANNEX I – PART ATCO – REQUIREMENTS FOR THE LICENSING OF AIR TRAFFIC CONTROLLERS, ATCO · Avioverse"
description: "Applicants for the issue of an STDI endorsement shall: have exercised the privileges of an air traffic controller licence in any rating for at least two…"
url: "https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-035"
---

# ATCO.C.035 Application for synthetic training device instructor endorsement

ANNEX I – PART ATCO – REQUIREMENTS FOR THE LICENSING OF AIR TRAFFIC CONTROLLERS · Regulation (EU) 2015/340 · EAR revision 14 Jun 2024

IR Implementing rule

## ATCO.C.035 Application for synthetic training device instructor endorsement

Applicants for the issue of an STDI endorsement shall:

(a) have exercised the privileges of an air traffic controller [licence](https://avioverse.aero/glossary/easa/licence) in any [rating](https://avioverse.aero/glossary/easa/rating) for at least two years; and

(b) within the year preceding the application have successfully completed a practical instructional techniques course during which the required knowledge and pedagogical skills are taught using theoretical and practical methods and have been appropriately assessed.

\[applicable until 3 August 2024 - Regulation (EU) 2015/340]

Applicants for the issue of an STDI endorsement shall:

(a) have exercised the privileges of an air traffic controller licence in any rating for at least 2 years. This period may be shortened to not less than 1 year by the competent authority when requested by the [training organisation](https://avioverse.aero/glossary/easa/training-organisation); and

(b) within the 12 months preceding the application, have successfully completed a practical instructional techniques course during which the required knowledge and pedagogical skills are taught using theoretical and practical methods and have been appropriately assessed.

\[applicable from 4 August 2024 - Implementing Regulation (EU) 2023/893]

IR · ATCO.C.035 — Regulation (EU) 2015/340 · Regulation (EU) 2023/893 · ATCO Easy Access Rules · EAR revision 14 Jun 2024

GM Guidance material

## GM1 ATCO.C.035(a) Application for synthetic training device instructor (STDI) endorsement

SHORTENING OF THE [LICENCE](https://avioverse.aero/glossary/easa/licence) EXPERIENCE REQUIREMENT FOR STDIs

When assessing a [training organisation](https://avioverse.aero/glossary/easa/training-organisation)’s request for the shortening of the licence experience requirement for STDIs, competent authorities should take into account the complexity of the training expected to be delivered by the potential STDI and the impact on the continuity of the provision of training.

\[applicable from 4 August 2024 - ED Decision 2023/011/R]

GM · GM1 ATCO.C.035(a) — Regulation (EU) 2015/340 · ED Decision 2023/011/R · ATCO Easy Access Rules · EAR revision 14 Jun 2024

[All rules in SUBPART C – REQUIREMENTS FOR INSTRUCTORS AND ASSESSORS](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c)

Consolidated from the EASA Easy Access Rules (revision 14 Jun 2024, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.