When I went through Nav training at Finningley, many years ago, proudly displayed on a wall in the nav school was the nav log as written by a 617 Sqn nav on the night of the Dams Raid. I can't remember whether it was actually Gibsons nav or not.
There was a small card under it describing it, and with the caption of something like...'an example of logging under pressure'.
I'm not sure if it made it to Cranwell when Finningley closed!
From what I can remember it wasn't written in crayon.