Morse code in Cayo Largo del Sur, Cuba is coded as "UCL", and UCL in Morse code is transmitted on its radio frequency. In some countries, during periods of maintenance, the facility may radiate a T-E-S-T code () or the code may be removed which tells pilots and navigators that the station is unreliable. In Canada, the identification is removed entirely to signify the navigation aid is not to be used. In the aviation service, Morse is typically sent at a very slow speed of about 5 words per minute. In the U.S., pilots do not actually have to know Morse to
The Ultimate Alphabet less prominent than others; the hardest to spot is in the "W" painting, where he appears (representing, of course "Wilks") in a tiny cameo on a reproduction of the cover of his earlier book "Weather Works". Each letter is itself represented several times, typically in braille, morse code, semaphore, and sign language as well as in its printed form. According to Wilks the book contained depictions of 7,777 words in total, ranging from just 30 for the letter X to 1,229 for the letter S, taking a total of 18,000 hours to complete. A single object may be described by