Chapter 18. Class E AirspaceSection 1. General18-1-1. INTRODUCTION18-1-2. CLASS E SURFACE AREAS18-1-3. DESIGNATIONSection 2. Transitional Airspace18-2-1. PURPOSE18-2-2. 700/1,200-FOOT CLASS E AIRSPACE18-2-3. 700-FOOT CLASS E AIRSPACE18-2-4. 1,200-FOOT CLASS E AIRSPACE18-2-5. CLASS E AIRSPACE FLOORS ABOVE 1,200 FEET18-2-6. COORDINATION OF MISSED APPROACH ALTITUDESSection 3. Transitional Airspace Area Criteria18-3-1. DEPARTURE AREA18-3-2. LENGTHY DEPARTURE CLASS E AIRSPACE EXTENSIONS18-3-3. ARRIVAL AREA18-3-4. ARRIVAL EXTENSION18-3-5. PROCEDURE TURN PROTECTION18-3-6. DETERMINING BASE ALTITUDES