That’s all true. And handheld radios have amazing capabilities today for those very brief messages.
https://www.google.com/search?q=chinese+radio+baofeng&rlz=1C1CHFX_enUS586US587&sxsrf=ACYBGNQG4xQqhWWSLxtkQU2G7ze93FpIIA:1578141080789&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjEmprU-enmAhWFbs0KHefNBcYQ_AUoAnoECAwQBA&biw=2133&bih=1076
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