xkcd #3307: Spectrum Allocation

Title text:

Rumor has it that they're finally auctioning off the zeppelin navigation bands, but everyone is worried that the scary boat captains will express interest.

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Source: https://xkcd.com/3307/

explainxkcd for #3307

Rumor has it that they're finally auctioning off the zeppelin navigation bands, but everyone is worried that the scary boat captains will express interest.
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[–] 18 points 1 day ago (1 child)

It’s intelligence officers broadcasting encrypted messages to operatives who can’t make contact from their post but no one can detect you receiving radio broadcasts

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