"Maxprop" wrote:

It isn't. US aircraft have 'N numbers', generally an N followed by four
numbers and a letter, or five numbers. Of course the vanity N numbers are
everywhere these days as well. For example, John Doe might have N44JD on
his Pitts Special.

You seem to know a lot about tail numbers for a doctor and sailor. :-)
I'm not surprised, many doctors have airplanes. I've seen tail numbers like
N1 and N1G before. The more simple, the harder they are to get possession
of.

LP