Abstract: A method is provided for delivery of data that are relevant for aviation to databases in navigation instruments in aircraft comprising a computing and memory unit together with a display unit. The data are communicated from a service provider as the transmitter via GSM modules (5) of a radiotelephone operator to the computing and memory unit (1) of the navigation instrument. An arrangement for performing the method is also provided wherein the computing and memory unit (1) of the navigation instrument in the aircraft is arranged in the aircraft with a GSM module (5) with an antenna (12) that is standard in radiotelephone technology and with corresponding GSM access to the data transmitter.