"phonetic alphabets" explains this sort of thing quite well.
One of my friends ask me a question as follow:
When watching the movie ANOTHER 48 HOURS
he found that a policeman read the numbers "DS9" in licence plate of a car as "David Sam Niner" instead of the normal pronouciation [di:] [es] [nai]
He insisted that there is a special ruler or habit for the native speakers on the 10 figures and 26 letters.
Could you please explain it for me ?
PS: Personnaly I think it is not a strict rule but just a habit for this very policeman or this very city .
I think all the policmen can unstanderd what you think if you just read the numbers in its original pronouciation.
I've found the number 9 can be read as niner but it seems that there is no rule on "david"insted of [di:] , or "sam"instead of [es]
Another question is whether it is a only mandatory rule for policmen or army ?
It seems that it is unneccesary for ordinary people to use such kind of produciation .
THANK YOU!Now it is clear for me.For us , the ordinary people , we can choose the way we prefer to , as long as there is no misunderstanding by listening.As a policeman and the like , he or she need to be obey the rule.
"Niner" is often used for the numeral nine over the radio because when the word "nine" spoken it can be mistaken for "five."
In the US, most police departments use a standardized phonetic alphabet, again because over the radio "D" might sound like "P" or "B", and it's easier to say "Adam Ocean Ida" instead of "A as in Apple, O as in Ocean, I as in Idaho...."