Document Type : Research Paper

Author

• Abbas Ali Saleh Abadi (Translator)

Member of Faculty, School of Mapping

Abstract

Although multi-beam echo-sounders have been utilized to transmit and use several types of audio pulses simultaneously in hydrography (to determine the depth and topography of the sea floor) for a long time and are presented at the market for hydrographic equipment, but the extensive use of this type of echo-sounders in marine affairs and military and civilian hydrographic surveying are also very useful.
Establishing port facilities and conducting surveying for such civilian applications using old methods (single-beam echo-sounders) requires utilization of a specific and orderly method of hydrography on a series of parallel and pre-designed lines, which is very difficult and time consuming to implement.
The purpose of this discussion is to provide suitable solutions for dealing with hydrographic issues in order to collect precise depth data with better quality and more density. Due to its compact size, echo-sounder can be easily fitted on small marine vessels, and can be used to fulfil the IHOS-44 standard using the great amount of depth-measurement data it collects. On the other hand, modern hydrographic equipment, in turn, necessitates proper and serious hydrographic methods and quality control of marine maps. The proposed methods renowned today are more closely linked to a series of modern hydrographic software that are easily adapted to modern equipment. The stage of processing, which is guaranteed in these equipment by certain software, is dependent on the ability and speed of the computer used for processing throughout its practice: from the stage of collecting raw depth data to application of tidal values, necessary corrections for the device and related errors, and also the stage of mapping and related calculations.