Tower

 Tower 

1. Clearance Delivery 
- Aircraft at gate get their routes
- What squack code to put in their transponder
- which runway to go to  

2. Ground Controllers 
- Move on the ground 
- Ground Controller Radar

3. Tower Controller 
- take off and landing of aircrafts

4. Area Controller 
lateral and vertical seperation

5. Area Controller Center  ACC  
* Sectors - large volume of area
* Approach Controller 
when aircraft is about 5-7 miles of airport approach hands over aircraft tower
- Slow down aircraft
- circle Around
- Vectoring (changing headings etc)

6. ATIS 

• ATIS provides pilots with essential non-control information in busy terminal areas, reducing workload for air traffic controllers and frequency congestion.

Content:

• Airport/facility name
• Phonetic letter code (e.g., "Information Alpha") 
• Time of the latest weather observation (UTC)
• Weather information (wind direction and velocity, visibility, obstructions to vision, sky condition, temperature, dew point, altimeter setting)
• Runway in use 
• Other pertinent remarks (e.g., NOTAMs, PIREPs) 

airways 
fixes