How do you cross CAS?

How do you cross CAS?

• A. Request a clearance from an ATS, that could be a transition or penetration or take-off clearance
• B. Descend below CAS to join a lower airspace
• C. Proceed through CAS without clearance
• D. Ask ATC to handle the entire route

Answer: (A)

Crossing controlled airspace requires ATC clearance. You must obtain a clearance from Air Traffic Services before entering the area, and ATC will issue the specific permission needed for that leg. The clearance could be a transition clearance (entering or leaving the CAS along your route), a penetration clearance (permission to fly through a defined portion of CAS), or take-off clearance (permission to depart into CAS). Once cleared, you fly the route as assigned and maintain the necessary communication and altitudes. Descending below the boundary to join lower airspace or attempting to go through CAS without clearance aren’t valid ways to cross. Merely asking ATC to handle the route doesn’t replace the need for an entry clearance—the entry into CAS must be authorized.

Crossing controlled airspace requires ATC clearance. You must obtain a clearance from Air Traffic Services before entering the area, and ATC will issue the specific permission needed for that leg. The clearance could be a transition clearance (entering or leaving the CAS along your route), a penetration clearance (permission to fly through a defined portion of CAS), or take-off clearance (permission to depart into CAS). Once cleared, you fly the route as assigned and maintain the necessary communication and altitudes.

Descending below the boundary to join lower airspace or attempting to go through CAS without clearance aren’t valid ways to cross. Merely asking ATC to handle the route doesn’t replace the need for an entry clearance—the entry into CAS must be authorized.