The Collaborative International Dictionary
Radiophare
Radiophare \Ra"di*o*phare\ (r[=a]"d[i^]*[-o]*f[^a]r), n. [Radio- + phare.] A radiotelegraphic station serving solely for determining the position of ships. The radius of operation of such stations was restricted by the International Radiotelegraphic Convention (1912) to 30 nautical miles.
Wiktionary
radiophare
n. radio beacon