Patent ID: 7564404

Claim:
A device for precisely determining the direction and distance to a radio beacon, comprised of: a) A first receiver configured to receive said radio beacon signals; b) A second receiver configured to receive navigation signals from a positioning system; c) A microcontroller; d) An output device; said radio beacon configured to transmit repetitive short messages, said messages having a predefined transmission time and each message transmitted on one of a predefined set of transmission channels, wherein said device is configured to consecutively and cyclically scan said transmission channels, tuning said first receiver to each one of said transmission channels for a period of time not longer than said predefined transmission time divided by the number of said predefined transmission channels, detect a signal transmitted by a radio beacon on one of said channels, decode the message modulated in said signal indicating said radio beacon's position, determine self position by means of said second receiver, calculate the direction and distance from said device to said radio beacon by means of said microcontroller and indicate said direction and distance on said output device.