Radio navigation or radionavigation is the application of radio [1] frequencies to determine a position of an object on the Earth Like radiolocation [2], it is a type of radiodetermination [3].

The basic principles are measurements from/to electric beacons [4], especially

• Angular directions [5], e.g. by bearing, radio phases or interferometry,
• Distances [6], e.g. ranging [7] by measurement of time of flight [8] between one transmitter and multiple receivers or vice versa,
• Distance differences by measurement of times of arrival [9] of signals from one transmitter to multiple receivers or vice versa
• Partly also velocity [10], e.g. by means of radio Doppler shift [11].

Combinations of these measurement principles also are important -- e.g., many radars measure range and azimuth of a target.

more can be found at Wikipedia https://en.wikipedia.org/wiki/Radio_navigation or https://en.wikipedia.org/wiki/Radionavigation-satellite_service

This site provides a lists and views of IALA DGNSS beacons that are copied from the IALA website.

1. A list of DGNSS message types; [12]
2. A list of DGNSS IALA beacons; [13] [13]
3. A overview of DGNSS IALA beacons; [14]
4. A overview of the coverage of DGNSS IALA beacons that could be used for R-mode [15].