Morse code was later made the standard by the International Telecommunication Union (ITU). Morse's original code specification, largely limited to use in the United States and Canada, became known as American Morse code or "railroad code". American Morse code is now seldom used except in historical re-enactments. In aviation, pilots use radio navigation aids. To ensure that the stations the pilots are using are serviceable, the stations transmit a set of identification letters (usually a two-to-five-letter version of the station name) in Morse code. Station identification letters are shown on air navigation charts. For example, the VOR-DME based at Vilo Acuña Airport
Samuel Finley Breese Morse Medal of geographical research.” The following people received the award in the year specified: Samuel Finley Breese Morse Medal The Samuel Finely Breese Morse Medal was established in 1902. Designed by Laura G. Fraser, this medal is awarded by the American Geographical Society for "achievements and pioneering in geographical research." Samuel Finley Breese Morse was a painter, but also a noted inventor. After extensive travel in Europe, Morse invented the first recording telegraph, which he submitted at patent for in 1837. His system of dots and dashes, equip with a dictionary and words, later was known as Morse Code. After his