An investigation into the use of very low frequency transmissions for ship navigation.

Abstract

The very low frequency band has been characterized by its extremely reliable propagation since the early days of radio. Recent development of oscillators accurate to a few parts in lO-H have made it possible to navigate a ship accurately by using existing VXF transmissions. One method of such navigation is discussed. In particular, navigation over long periods of time is explained, with corrections for diurnal phase shift incorporated in the calculation of ships position. Equipment used to obtain experimental data is described and experimental results and sample calculations are presented.