Class A Airspace - ATP Flight School

Question 1

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Vertical extent of Class A airspace

Answer 1

From 18,000’ MSL up to and including FL 600

Question 2

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Lateral extent of Class A airspace

Answer 2

Covers the entire US except for Hawaii and a small part of Alaska; extends 12 NM offshore

Question 3

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Entry requirements for Class A airspace

Answer 3

Must have an IFR clearance from ATC

Question 4

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Communications requirements in Class A airspace

Answer 4

Maintain two-way radio communications with ATC

Question 5

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Equipment requirements in Class A airspace

Answer 5

Mode C transponder; two-way radio; all equipment required for IFR flight

Question 6

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Pilot certification requirements in Class A airspace

Answer 6

Private pilot with instrument rating

Question 7

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Traffic separation provided by ATC in Class A airspace

Answer 7

IFR/IFR (no VFR traffic allowed)

Question 8

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Altimeter setting(s) used in Class A airspace

Answer 8

All aircraft set their altimeters to 29.92” Hg (standard pressure)

Question 9

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Why do aircraft in Class A use 29.92” instead of a local altimeter setting?

Answer 9

No terrain or obstructions to avoid in Class A, only other aircraft, so flying exact MSL or AGL altitudes isn’t important. Easier to keep everyone at the right altitude if everyone uses the same altimeter setting.

Question 10

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Basic VFR weather minimums, Class A

Answer 10

VFR weather minimums not applicable