daveJB, DME was controlled and displayed to the nav studes alone. The ADF was also controlled by the nav but the pilots could see the display.
On the pilot's resettlement course - Civil IRT - they had to take a nav along to tune the ADF. The pilot had to check the beacon coding but was wholly reliant on the nav on speed of tuning etc. As I could do it pretty quickly and was not otherwise involved in teaching studes I got a good number of jollies out of it with Berlin a few times etc.
