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579. At mid-day in the summer, what would be the best choice in attempting to communicate, using J3E voice with a shore station some 1800 miles distant?
Higher HF bands are the optimal choice for J3E voice communication over 1800 miles at mid-day in summer due to favorable daytime ionospheric conditions for long-range sky-wave propagation; VHF and MF are unsuitable for this distance, and lower HF bands are significantly absorbed.
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