We’ve all seen it. When you click on an airport you see the basic information, along with the “Class” followed by some weird word. What does it mean? Well, ill tell you today!
Airports that are in between the altitudes of 18,000 ft and 60,000 ft are classified as class A or Alpha Airports over the altitude of 60,000 ft revert to class E or Echo
Class Bravo airports and airspace are major airports that are controlled by ATC. The roofing of Class B or Bravo are around 10,000 ft. In Denver, CO and Salt Lake City, UT the roofing is at 12,000 ft. In Phoenix, AZ, the roofing is at 9,000 ft. Aircraft must establish two-way radio communication with ATC and obtain a clearance to enter Class B airspace
Class C or Charlie is an airspace controlled by ATC with a moderate amount of traffic.
Class D or Delta is an airspace with smaller amounts of traffic. The USA modified class D so that pilots only need to be in contact with ATC to enter the airspace, instead of needing clearance.
Class E or Echo is any other uncontrolled airspace, which always uses a Unicom. Class E airspace exists in many forms, however class E airspace rarely have traffic. It can serve as a surface-based extension to Class D airspace to accommodate IFR approach/departure procedure areas. At an altitude of over 18,000 ft, the airspace turns into class A. If over 60,000 ft, the airspace reverts back to class E
The USA currently doesn’t have a class F or Foxtrot airspace.
Class G or Golf is an uncontrolled airspace, mostly used as a small airspace close to the ground.
This concludes all the Letter classes for the USA. If i have gotten any information wrong, feel free to call that out and correct me.