Radio beacon and Radio beam

Radio beacon noun - A radio station that broadcasts a directional signal for navigational purposes.

Radio beam and radio beacon are semantically related. in navigation signal topic. In some cases you can use "Radio beam" instead a noun phrase "Radio beacon".

Radio beam noun - A signal transmitted along a narrow path; guides airplane pilots in darkness or bad weather.

Radio beacon and radio beam are semantically related. Sometimes you can replace phrase "Radio beacon" with "Radio beam", this phrases are similar.