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- -- card: 53104 from stack: in
- -- bmap block id: 0
- -- flags: 4000
- -- background id: 7720
- -- name: #173
- ----- HyperTalk script -----
- on openCard
- global group,rightone
- put 18 into group
- put "D" into rightone
- pass openCard
- end openCard
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- -- part contents for background part 20
- ----- text -----
- Question #18
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- -- part contents for background part 1
- ----- text -----
- 4BD-4.6 What type of antenna is most useful for sky-wave reception in radio direction finding?
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- -- part contents for background part 11
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- A log-periodic dipole array
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- -- part contents for background part 27
- ----- text -----
- An isotropic antenna
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- -- part contents for background part 28
- ----- text -----
- A circularly polarized antenna
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- -- part contents for background part 29
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- An Adcock antenna
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- -- part contents for background part 43
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- Correct answer is D