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-1245 Braille pattern dots-1245 The Braille pattern dots-1245 ( ) is a 6-dot or 8-dot braille cell with the top four dots raised. It is represented by the Unicode code point U+281b, and in Braille ASCII with G. In unified international braille, the braille pattern dots-1245 is used to represent a voiced velar plosive, i.e. /g/, and is otherwise assigned as needed. It is also used for the number 7. Related to Braille pattern dots-1245 are Braille patterns 12457, 12458, and 124578, which are used in 8-dot braille systems, such as Gardner-Salinas and Luxembourgish Braille. In the Japanese kantenji braille, the