A joke from the same family involves a pilot who gets lost in IMC conditions, and his radio is dead. Suddenly, looming out of the gloom is an office building with an open window. An employee spots the plane going by and waves. The pilot circles around and shouts "Where am I?"

The employee shouts back "In an airplane!" The pilot nods, sets a course, and navigates precisely 11 nautical miles NNE, and descends. Sure enough, a runway appears and he lands perfectly. Of course, he's debriefed about the incident. "How, " the investigator asks, "Did you find the airport?"

The pilot recounts the shouted conversation. "My question was answered in a way that was absolutely correct but useless for any practical purpose. I reasoned that I was talking to Microsoft Tech Support at their HQ, and I could dead reckon to Redmond Municipal Airport from there."