coconut telegraph
n.— «SSB networks are simply an organized meeting place on a particular radio frequency at an established time, where an unlimited number of boaters can meet and share the latest weather forecasts and local news. Nets are usually controlled by one person, who acts something like a telephone operator to direct the flow of callers. This method of sharing information is sometimes called the “coconut telegraph.”» —“Cruisers Stay in Contact on the ’Coconut Telegraph'” by Pat Rains The Log (Irvine, California) April 29, 2009. (source: Double-Tongued Dictionary)
Further reading
Mary Beth in Greenville, South Carolina, wonders: Why do we say four-oh-nine for the number 409 instead of four-zero-nine or four-aught-nine? What are the rules for saying either zero or oh or aught or ought to indicate that arithmetical symbol...
Astronauts returning from space say they experience what’s called the overview effect, a new understanding of the fragility of our planet and our need to reflect on what humans all share as a species. A book about the end of the universe...