On a map its called a key
The primary responsibility of air traffic controllers is the separation of aircraft. They control traffic in and around airports and in the terminal and en route airspace in between. Controllers speak directly with pilots, notifying them of traffic or weather in there vicinity.
Answer:
I have no idea I'm sorrrrrrry
Answer: copy and paste this link its the answers to all your questions
https://www.dvrhs.org/cms/lib2/NJ01001243/Centricity/Domain/132/Exploration%20Atlas%20Answers.pdf
Explanation:
Mrk me brainliest plz