long wave

US /ˈlɔŋ weɪv/
UK /ˈlɔŋ weɪv/
"long wave" picture
1.

onda lunga

a radio wave of a wavelength greater than 1,000 meters (frequency less than 300 kHz), used for long-distance communication.

:
Ships at sea often rely on long wave radio for navigation and communication.
Le navi in mare spesso si affidano alla radio a onde lunghe per la navigazione e la comunicazione.
The old radio could pick up stations on the long wave band.
La vecchia radio poteva captare stazioni sulla banda delle onde lunghe.