Morse code was a method of transmitting messages as a series of on-off tones. An S.O.S. was a radio transmitted distress signal, which is tapped out in morse code.
Marvin once suggested that the Krim family may use their abilities to make an object tap out a message in code.
While Colonel Wilcox was monitoring Doctor Hiram Gulliver's microwave miniaturization beams using a frequency filter, he realized there was another message coming through the signal, and even his best decoders couldn't determine what it was, they only knew that it wasn't Morse code.
- ↑ As seen in The Balloon People.
- ↑ As seen in Gulliver's Gigantic Goof (1973).