オメガ航こう法ほうじ字FuriganaMeanings1nounOmega navigation systemA historical global radio navigation system that operated from the 1970s to 1997, using very low frequency signals.オメガ航こう法ほうはGPSの登とう場じょう以い前ぜんに広ひろく使つかわれていた。The Omega navigation system was widely used before the advent of GPS.
