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Articles

1987: Vol. LXIV, No. 1

The Swedish Parallel Sounding Method State of the Art

Submitted
July 31, 2015
Published
2015-07-24

Abstract

In the sixties the Swedish Hydrographic Department developed a new method for hydrographic surveys. Instead of a single ship, a formation of up to nine vessels, navigating along parallel lines, was used for the echo sounding work. The formation consists of a mother vessel, positioned from the shore stations, and the satellite boats, positioned from the mother vessel. During the years the method has been refined in various aspects and is today a powerful instrument with an efficiency remarkably superior to that achieved in earlier days. The contributions to the increase in efficiency derive from such sources as equipment, like vessels, positioning systems and echo sounders, from computer and computer programs, and from new methods for calibration, surveying, evaluation of collected data, etc.