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GATCSA may like to know how the working time regulations are implemented at a UK centre.
The controller's console incorporates a card slot, into which the controller places his/her identity pass; this can be monitored at the supervisor's workstation to facilitate timely relief and efficient use of staff resources. An additional slot can be used for a trainee's pass and thus training hours and instructor hours can be similarly recorded.
The relief controller simply removes one pass and replaces it with his/her own as part of the handover process. An additional benefit allows easy [and discreet] identification of staff in event of an incident .