Radio codes. Used by police. 10-20 means one's location.
Police Radio Codes
Student or Learner
What does 'What's his twenty?' mean? Why is twenty used here?
"What's his twenty right now?" "He's
just up the road, in the turnoff to the water tank...
Thank you in advance.
This is a great answer. I can't thank you enough, SoothingDave.