wearing an Aircrew Brevet
But why would they wear a patent, certificate, ticket or diploma?
https://www.wordhippo.com/what-is/th...rd-brevet.html
PS. On a less flippant tack... The way that PJIs got around this, that may also be JNCOs, is to be deemed ‘Honorary Aircrew’ as per various King’s and Queen’s Regulations. That way, they could be deemed as Aircrew as the ‘Commander in Chief’ (HMTQ) has deemed it so. However, we then get into MERTs and Aeromed personnel that should also deserve such recognition too for operating equipment on an aircraft in a particular role fit??