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
Braille pattern dots-35 Braille pattern dots-35 The Braille pattern dots-35 ( ) is a 6-dot braille cell with the bottom left and middle right dots raised, or an 8-dot braille cell with the lower-middle left and upper-middle right dots raised. It is represented by the Unicode code point U+2814, and in Braille ASCII with the number 9. In unified international braille, the braille pattern dots-35 is used to represent unrounded, close or near-close, front to central vowel, such as /i/, /ɪ/, /ɪ̈/, or /ɨ/ when multiple letters correspond to these values, and is otherwise assigned as needed. Related to Braille pattern dots-35 are