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-125 Braille pattern dots-125 The Braille pattern dots-125 ( ) is a 6-dot braille cell with the top left and both middle dots raised, or an 8-dot braille cell with the top left and both upper-middle dots raised. It is represented by the Unicode code point U+2813, and in Braille ASCII with H. In unified international braille, the braille pattern dots-125 is used to represent guttural fricatives and approximants, such as /h/, /ħ/, or /ɦ/, and is otherwise assigned as needed. It is also used for the number 8. Related to Braille pattern dots-125 are Braille patterns 1257, 1258, and 12578,