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5. Use the information you studied in Unit 006-3B to answer at of the following 16
questions correctly.

a. What does air-to-air visibility refer to?

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b. What does air-to-ground visibility refer to?

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c. What does horizontal surface visibility refer to?

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d. What does vertical visibility refer to?

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e. What are the general characteristics of stable air as to visibility?

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f. What are the general characteristics of unstable air as to visibility?

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g. What are the three types of solid particles that are often lifted from the surface and

blown by winds so that they restrict visibility?

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