Same thing here in German military where instead of saying "zwei" because it might sound like "drei", you say "zwo".
It's quite useful even though its a small problem compared to all those problems which happen because of the way you read numbers above 20. "Twenty one" becomes "one and twenty". It's not as bad as French but still a pain and I've seen Germans mixing it up also.
It's quite useful even though its a small problem compared to all those problems which happen because of the way you read numbers above 20. "Twenty one" becomes "one and twenty". It's not as bad as French but still a pain and I've seen Germans mixing it up also.