We Canadians seem to get as much mileage out of the letter "C" as our American neighbours do out of that "M" as a designator

"C-2" in my day meant a 7.62mm rifle or one of the "new" Leopard Tanks. Our soldiers are carrying what is basically the M-16 but is referred to nowadays as a "C-6" or "C-7" and our new Leos are (I believe) also designated"C-6" 's...

Obvious where the "C" comes from -but it's still confusing!

(The Iron Dahlia, by the way, was/is a huge fan of "The Prisoner" ! )