I can`t comment on the present day description but I was an ATCA2 back in the sixties.
I was involved as a simulator assistant during the training of `D` men to do radar, prior to the introduction of the `Mediator` system.
My position remained as a fully qualifed ATCA2 with all the appropriate pay and conditions that applied to that post.
My duties, along with the other 3 ATCA2`s, was to run the simulator, producing the radar traffic for the simulation.
West Drayton had a simulator section but I imagine that has now moved to Swanick.
Dave