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They say they have found four basic components they think make up this phonetic alphabet.

The description of what the researchers termed a “sperm whale phonetic alphabet” opens the possibility of conveying a much larger variety of information.

On Tuesday, the scientists reported that the whales use a much richer set of sounds than previously known, which they called a “sperm whale phonetic alphabet.”

For much of the show’s run, various minor nurse characters were so interchangeable that they were repeatedly named “Able” and “Baker” — literally, “A” and “B” in an older version of the military phonetic alphabet.

Just type “ICS” in the search function to read about the ways signals can be sent, and to see flag images, their meanings, associated letters and phonetic alphabet letters.