Posted for Steve Reeves <sreeves@sc.rr.com>:

 I thought the whole point of doing the double-speak was to inform a pilot
tuning into the freq in the middle of the transmission.  I don't do it all the
time, but must admit I do it occasionally as that was the way I was taught.
 
 Steve Reeves
 Glasair 1FT38SR
 987 hrs