Airspace

Chapter 20. Air Navigational Routes
Section 1. General
20-1-1. Purpose	20-1-6. Changeover Points
20-1-2. Controlled Airspace	20-1-7. Base Altitudes
20-1-3. When To Designate Air Navigational Routes	20-1-8. Minimum En Route Altitudes (MEA)
20-1-4. Responsibilities	20-1-9. Procedural Requirements
20-1-5. Route Identification	20-1-10. Action To Raise Base of Transitional Areas
Section 2. Flight Inspection Requirements
20-2-1. Request for Flight Inspection Data	20-2-3. Flight Inspection Requests
20-2-2. Flight Inspection Data Distribution	20-2-4. Flight Inspection Report
Section 3. Low/Medium Frequency and VOR Airways
20-3-1. NAVAID Spacing	20-3-3. Width Reductions
20-3-2. Vertical and Lateral Extent
Section 4. Jet Routes
20-4-1. Designation	20-4-3. Jet Route Width
20-4-2. NAVAID Spacing
Section 5. Area Navigation Routes
20-5-1. Discussion	20-5-3. Lateral Protected Airspace Criteria for RNAV En Route Segments
20-5-2. Waypoint Criteria	20-5-4. En Route Turn Protection Criteria

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