Chapter 18. Class E Airspace ▶ Section 1. General 18-1-1. INTRODUCTION 18-1-2. CLASS E SURFACE AREAS 18-1-3. DESIGNATION ▶ Section 2. Transitional Airspace 18-2-1. PURPOSE 18-2-2. 700/1,200-FOOT CLASS E AIRSPACE 18-2-3. 700-FOOT CLASS E AIRSPACE 18-2-4. 1,200-FOOT CLASS E AIRSPACE 18-2-5. CLASS E AIRSPACE FLOORS ABOVE 1,200 FEET 18-2-6. COORDINATION OF MISSED APPROACH ALTITUDES ▶ Section 3. Transitional Airspace Area Criteria 18-3-1. DEPARTURE AREA 18-3-2. LENGTHY DEPARTURE CLASS E AIRSPACE EXTENSIONS 18-3-3. ARRIVAL AREA 18-3-4. ARRIVAL EXTENSION 18-3-5. PROCEDURE TURN PROTECTION 18-3-6. DETERMINING BASE ALTITUDES