I mentioned in a previous post that I was writing something involving conversations between police officers. I contacted the Vancouver Police Department media office to get details on what exactly what was said in certain circumstances. I was sent the following very helpful e-mail as a response. Completely unrelated to this, I'm drawn to painting lately. I may dabble in that a bit more in future.
Hello, Pat.
As a former police dispatcher, I think I'm qualified to answer your
questions.
First of all, all police units are assigned a call sign. It's usually a
combination of a letter and a number. For example, C4 (pronounced
phonetically as Charlie-Four) or 3B14 (Three-Bravo-Fourteen). Anytime a
dispatcher calls them, they use the name and anytime the officer calls
dispatch, they identify themselves with the name. So the dispatcher
would be likely to say something like, "Charlie-Four, what is your
location?" More often, police and dispatchers use the world "twenty"
for location, as in "What's your twenty?" It refers to a 10-code
sometimes used in policing and 10-20 is location. "Location" is also
used and might be better understood by your readers.
Whenever we have a serious incident, like a police shooting, there is a
tone alert that sounds over all the radio channels called a warble. It
alerts all the units that something serious is happening. The
dispatcher would then say something like, "All units. Shots fired.
Officer down. Rideau and Howe. Units responding?" and then the units
responding would reply. "3B12. I'm at Main and 10th," might be a reply.
The unit identifies himself and gives his present location so the other
officers and the dispatcher know where he is coming from and his
approximate time to get there. The other units responding would also
answer the same.
As for descriptions, the officer would likely say, "3B12. We're looking
for Jerome Ashton, black male, early 20s." He might also add, "He was
last seen on foot, eastbound on Howe."
Also, the international phonetic alphabet is used frequently and always
in the car's call sign. If you don't know it, you can likely find it on
the internet.
I hope that helps.
Laurel Kennedy
Communications Coordinator
Public Affairs & Marketing
Vancouver Police Department
604-717-2680
laurel.kennedy@vpd.ca