GM1 ATCO.D.080(b)(3) Refresher training ED Decision 2023/011/R TRAINING IN TEAM RESOURCE MANAGEMENT (TRM) Guidance on team resource management can be found in the Network Manager document ‘Team Resource Management — Guidelines for the Implementation and Enhancement of TRM’, edition 1.0 of 26 April 2021, and associated Annex A to TRM Guidance Material - TRM Modules | SKYbrary Aviation Safety and Annex B to TRM Guidance Material - Facilitator Competence and Training | SKYbrary Aviation Safety)....