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-356 Braille pattern dots-356 The Braille pattern dots-356 ( ) is a 6-dot braille cell with the middle right and both bottom dots raised, or an 8-dot braille cell with the upper-middle right and both lower-middle dots raised. It is represented by the Unicode code point U+2834, and in Braille ASCII with the number 0. In unified international braille, the braille pattern dots-356 is used to represent various punctuation, often coupled with Braille pattern dots-236 as an closing mark. † Abolished in Unified English Braille Related to Braille pattern dots-356 are Braille patterns 3567, 3568, and 35678, which are used in