"Ron Garret" wrote in message
...

One could just as easily decide that the number 0 is not used in
aircraft identifiers to avoid confusion with the letter O. Nothing
would actually have to change.


One is not free to decide that. The letters I and O are not used for
aircraft registration in the US. FAR 47.15(b) would have to change.


§ 47.15 Identification number.

(b) A U.S. identification number may not exceed five symbols in addition
to
the prefix letter "N". These symbols may be all numbers (N10000), one to
four numbers and one suffix letter (N 1000A), or one to three numbers and
two suffix letters (N 100AB). The letters "I" and "O" may not be used. The
first zero in a number must always be preceded by at least one of the
numbers 1 through 9.



I don't think so, but the VNY controllers don't call out the aircraft
type. They always open with "November".


You are free to open with the type regardless what the controller does.