Summary

Donald Keyhoe,  The Flying Saucers are Real

“ Our explorers would have no idea of what awaits them. The planet might be uninhabited. It might be peopled by a fiercely barbarous race. Or it might have a civilization far in advance of the Earth.
The explorers would first try to get a general idea of the whole planet. Then they would attempt to examine the most densely populated areas, types of armament, any aircraft likely to attack them. Combing the radio spectrum, they would pick up and record sounds and signals in order to decipher the language. As on the Earth, they might hear a hodgepodge of tongues.
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Source: Wikisource

Donald Keyhoe,  The Flying Saucers are Real

“ Assuming the attainment of as much as half the limiting speed, our space explorers will have to dedicate at least thirty-two years to the hazardous, lonely round trip. However, there has never been a lack of volunteers for grand undertakings in the history of man.
No one expects the attempt to be made until we have a space vehicle able to make the round trip and report back. One-way trips would tell the Earth nothing.
The most likely step will be to establish a space base which will circle the chosen planet in an orbit, like the proposed Earth satellite.
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Source: Wikisource

Donald Keyhoe,  The Flying Saucers are Real

“ A manned space craft might make a survey at night, or in daytime with clouds near by to shield it. By hovering over the planet's aircraft bases, the explorers would get most of the picture -- and also decide whether the bases were suitable for their own use later.
IF THE appearance of our "observer" units and space craft caused too violent reactions on the planet, the explorers would probably withdraw to their orbiting space vehicle and either wait for a lull or else start the long trip back to Earth.
”
Source: Wikisource

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