That is great it has explained so much to me that I have never understood. In October 1978 20 y/o Frederick Valentich disappeared over the Bass Strait, Australia. The Authorities always said he suffered disorientation others said a UFO. A young trainee pilot flying solo at night would be a dangerous combination. Thanks Tom.,(reply>), @Robert Fletcher it is even for a not trainee with a huge gliding experience (ten years of flying for example) really hard flying at night without artificial horizon and the other instruments, besides the fact it is illegal for VFR