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-256 Braille pattern dots-256 The Braille pattern dots-256 ( ) is a 6-dot braille cell with both middle, and the bottom right dots raised, or an 8-dot braille cell with both upper-middle, and the lower-middle right dots raised. It is represented by the Unicode code point U+2832, and in Braille ASCII with the number 4. In unified international braille, the braille pattern dots-256 is used to represent punctuation, and otherwise as needed. Related to Braille pattern dots-256 are Braille patterns 2567, 2568, and 25678, which are used in 8-dot braille systems, such as Gardner-Salinas and Luxembourgish Braille. In the Japanese kantenji