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National airspace system

Objective

The student should have an understanding of the national airspace system, and be able to apply it to a cross-country flight or sectional chart.

Elements

  • airspace classes
  • special-use airspace
  • chart appearance

Schedule

Introduction 05
Main body 25
Application 05
Conclusion 05
Total 40 minutes

Equipment

Instructor actions

Using lecture and guided discussion techniques, introduce the student to the national airspace system and establish an understanding of the different types and restrictions. With a chart or FliteStar planning software, introduce unfamiliar areas and use the airspace to create scenarios.

Student actions

Read and complete the assigned homework; actively listen to the lecture and guided discussion, and participate in the scenario-based activity.

Completion standards

The student should be able to identify various airspace, features, and the associated limitations with limited instructor guidance.

Teaching outline

  • controlled vs uncontrolled
    • atc service provided in controlled only
  • with overlapping airspace, the more restrictive airspace applies
  • VFR cruising altitudes
Controlled airspace
  • Class A
    • 18,000 – 60,000 ft msl
    • contains all jetways
    • IFR flights only
    • must be cleared to enter
    • mode c required
  • Class B
    • busiest airports, custom inverted wedding cake layout
    • sfc – 10,000 ft msl, 20 nm radius in most cases
    • must be cleared to enter
    • VFR: 3 sm, clear of clouds
    • mode c required (30 nm veil)
    • pilot certificate or appropriate endorsements
  • Class C
    • congested airports, one-step inverted wedding cake
    • sfc – 4,000 ft agl, 5 nm radius
    • 1,200 – 4,000 ft agl, 10 nm radius
    • two-way radio communication required to enter
    • mode c required (30 nm veil)
    • VFR: 3 sm, 500 ft below, 1,000 ft above, 2,000 ft horizontal
  • Class D
    • general airports
    • sfc – 2,500 ft agl, 4 nm radius
    • two-way radio communication required to enter
    • VFR: 3 sm, 500 ft below, 1,000 ft above, 2,000 ft horizontal
  • Class E
    • all other controlled airspace
    • starts at a variety of altitudes including the surface, with a limit of 18,000 ft msl
    • surrounds airports with IFR operations but no tower
    • VFR below 10,000 ft msl: 3 sm, 500 ft below, 1,000 ft above, 2,000 ft horizontal
    • VFR above 10,000 ft msl: 5 sm, 1,000 ft below, 1,000 ft above, 1 sm horizontal
Class G (uncontrolled) airspace
  • 1,200 ft agl and below
  • can extend up to 14,500 ft msl
  • typically reaches 10,000 ft msl
  • VFR weather minimums:
    • 1,200 ft agl or less: 1 sm, clear of clouds (day) or 3+5/1/2 (night)
    • 1,200 ft agl – 10,000 ft msl: 1+5/1/2 (day) or 3+5/1/2 (night)
    • 1,200+ ft agl + 10,000+ ft msl: 5+1/1/1 (day and night)
  • no flight plan required for IFR flights that remain wholly within Class G
Special-use airspace
  • prohibited
  • warning – coastal, 3 nm
  • restricted areas – permission required
  • military operations areas (MOAs)
  • alert areas – high volume training
  • controlled firing areas – not depicted, but activity ceases if aircraft overfly
Other airspace
  • temporary flight restrictions (TFRs)
  • military training routes (MTRs)

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