I've been in one of these! The South Australian Air Training Corps (now the Air Cadets) had (maybe still has) an operational one in the mid 1990's, and we got to have a go! All the instruments worked, it was great fun. They told us that one pilot was shot down in one of these. A stray bullet, I can't recall if it was friendly fire or hostile. I assume it was just a story they told us cadets. The triangle thing they have on the desk can be put down, and it will wander around the map with its wheels telling the Instructor where you are, and they can talk to you through a headset to say "Your position is this, I want you to change head to Y, speed to Z, etc".,(reply>), @Aldefredger Indeed. The big lesson I remember being pushed was to trust the instruments. Still a valuable lesson today.,(reply>), or, more interestingly as i saw in a ww2 training film, they can ask the pilot where they think they are and check their navigation against the triangle to tell them where they made mistakes