warning radio beacon
warning radio beacon[′wȯrn·iŋ ′rād·ē·ō ‚bē·kən]
An auxiliary radio beacon that is located at a lightship to warn vessels of their proximity to the lightship; it is of short range, and sounds a warbling note for 1 minute immediately following the main radio beacon on the same frequency. Also known as warning beacon.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.