Aircraft saved by rudimentary Astro?
I'm due to give a talk on Aviation Astro Navigation and would like to introduce it with the story of the airliner which received a distress message from a lost single pilot aircraft. The airliner crew established the position of the lost aircraft by means of very rudimentary astro using the altitude of the sun measured with a thumb and its azimuth. But I can't recall any of the interesting details such as when, where, who etc. Can anybody help?