A system operating on the assigned frequency of 100 kHz and having a groundwave range of nominally 1500 miles over sea water or land.
Very high accuracy is obtained by comparing the phase of the cycles comprising the pulses of the paired stations.
The occupied bandwidth is 20 kHz.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM