Shore-based radio positioning systems and geodetic controls for hydrographic surveys

Abstract

Position determination at sea presents various problems compared to that on the land. In this paper the authors have discussed the principles of shore based radio positioning systems and the various systems in use bringing out the range of operation and their relative accuracies. Some of the systems like DECCA, LORAN-C including computations for coordinates on the local datum have been discussed. The Doppler Satellite method which is becoming increasingly popular for positioning at sea as well as on the land and its connection to the main geodetic network of the country has also been brought out