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
Morse Code (horse) Golden Miller going off the 7/4 favourite. The race was run at a slow pace and as the horses approached the second last fence Airgead Sios, Morse Code, Golden Miller and Macauley were closely grouped. Airgead Sios made a bad mistake and hampered Macauley, taking both horses out of contention and leaving Morse Code in front with Golden Miller as his only serious rival. Golden Miller attempted to launch a challenge at the last fence, but Morse code stayed on too strongly for the favourite and won by two lengths, with three lengths back to Macauley in third. Morse Code's