The normal operating frequency was 500 kHz (600 m wavelength), however the equipment could also operate on the "short" wavelength of 1,000 kHz (300 m wavelength) that was employed by smaller vessels with shorter antennas.
Den normala driftsfrekvensen var 500 kHz (600 m våglängd), men utrustningen kunde också fungera på ”kort” våglängd på 1 000 kHz (300 m våglängd) som användes av mindre fartyg med kortare antenner.