Clearance when ATS becomes active
Hey guys, could be a dumb question but it could be a situation i am faced with in the near future:
Obviously flying through military airspace requires a clearance when the tower is open, otherwise it is just a CTAF outside these hours. However, what is the procedure if the area becomes active when you're overhead? Do they announce it on the CTAF then you contact clearance delivery or what is the procedure?
Thx guys.