When I was at nav school a stude on another course got chopped for fiddling his astro. Basically he got a gee fix which he plotted as a three line fix, then entered plausible astro figures which replaced the garbage he had obtained when shooting his own astro. He was chopped not only because of his ineptitude but because of his lack of integrity. What really annoyed me was that instead of being out on his ear he was offered RAF Regiment. I was still wearing my Regiment flashes as I went through the course and I took great exception to the idea that somehow or other a Regiment officer didn't need the same level of integrity as a navigator. I brought this up with my course commander and asked if anything could be done, but was basically told to wind my neck in.
No idea what happened to him in the Regiment - I hope he didn't end up killing one of his own blokes because of some sin of omission which he had covered up.