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-235 Braille pattern dots-235 The Braille pattern dots-235 ( ) is a 6-dot braille cell with dots raised, or an 8-dot braille cell with raised. It is represented by the Unicode code point U+2816, and in Braille ASCII with the number 6. In unified international braille, the braille pattern dots-235 is used to represent an exclamation point, other punctuation, and otherwise assigned as needed. † Abolished in Unified English Braille Related to Braille pattern dots-235 are Braille patterns 2357, 2358, and 23578, which are used in 8-dot braille systems, such as Gardner-Salinas and Luxembourgish Braille. In the Japanese kantenji braille, the