Where do Navs go
I completed a National Service nav course after failing an airframe drivers course.
Afterwards I found that if I had passed the drivers course the possible directions were Meteor or Shackleton, and having tried to fly an Oxford rather than a Harvard, Shackelton was the more probable. I did not fancy being a Nav in a Shack or in a Meteor NF11 either
I knew someone who did 20 hour patrols in a Shack, and he was never the same again. So I went back to civvy and spent the next 25 years designing aircraft equipment.