Step 1 : Introduction to the question "3. NATO's C is widely known as it's a popular name. Which one?"
...1. Charlie 2. Chuck 3. Chester 4. Conrad Charlie it is. Conrad would not work well as it's possible to mistake the N sound for an M sound. The word for help is 'mayday' from the french 'm'aidez' = help me. During the Vietnam war, the North Vietnamese were often referred to as V.C., short for Viet Cong. The C in V.C. was Charlie, which became a nickname for the opposition.