Airspace at an airport with a part-time control tower is classified as Class D airspace only

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Which cruising altitude is appropriate for VFR flight on a magnetic course of 135°?

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(Refer to figure 26, area 2.) The floor of Class B airspace at Addison Airport is

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Which is true concerning the blue and magenta colors used to depict airports on Sectional Aeronautical Charts?

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(Refer to figure 24, area 3.) What is the floor of the Savannah Class C airspace at the shelf area (outer circle)?

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