Back in the 70's I was a member of the Air Cadets adult staff and attended a navigation course at RAF Finningley,
At the end of the week all 20 of us were taken to the Dominie simulator to check out our DR work.
"Fly to position x, then to go to airfield y" was the instruction given to us. "x" was a lat/long out in the North Sea. All we got was a forecast wind and sent on our way.
I made a silly mistake on the first leg on my timings and while on track OK I turned for the second leg a few minutes early. However the instructors were somewhat puzzled that I hit the airfield spot on. Forgot to tell them I had used the base TACAN.
Only did two adult courses with the cadets, the other being on radio and radar at RAF Cosford. Both excellence weeks and the nav course also helped when I went for an interview for an civil airline ops job.