Grzegorz Zaniewicz

Analysis of the Possibility of Using Radar Tracking Method Based on GRNN for Processing Sonar Spatial Data

This paper presents the approach of applying radar tracking methods for tracking underwater objects using stationary sonar. Authors introduce existing in navigation methods of target tracking with particular attention to methods based on neural filters. Their specific implementation for sonar spatial data is also described. The results of conducted experiments with the use of real sonograms are presented.

Verification of multiple model neural tracking filter with ship's radar

The paper presents the research focused on verification of multiple model neural filter in real environment. The filter is a result of the works in the research project and is implemented as a software application. The application is then connected to real radar making the off-line verification possible. The filter was checked against IMO requirements and was compared to other commercially used filters. Estimation errors and delay was the basis for the verification. Achieved results show that proposed solution might be an interesting alternative for numerical filters.

Detecting small moving underwater objects using scanning sonar in waterside surveillance and complex security solutions

In this paper authors present the research on capabilities of high-frequency scanning sonar in detecting small moving underwater targets. The state of the art on sonar technologies used in port security systems is described together with MSIS characteristics and its applications. The series of tests were carried in real conditions of security systems (port areas). Influence of scanning parameters (signal gain, beam range, scanning speed, TVG correction) on the object detection was tested. The relations between signals characteristics, image quality (resolution, bit depth) and object detection capability was determined.

Implementation of Voyage Assistant Module in Mobile Navigation System for Inland Waters

Route monitoring is one of the most important functions in modern navigation systems. In case of marine merchant ship’s it usually part of IMO‐standardized solutions like ECDIS or INS. In inland waters Inland ECDIS is implemented. There is however large group of ships which do not have to follow standardized solution, like recreational ships. The skippers of these boats more and more often are using mobile devices. The paper presents considerations on implementation of voyage assistant module in mobile navigation system in inland waters. Main problems are defined solutions for them are proposed. In general proposed approach is based on mobile cartography like in car navigation and derives also from water navigation systems. The verification research are described and commented. http://www.transnav.eu the International Journal on Marine Navigation and Safety of Sea Transportation Volume 11

Using high-density bathymetric data for the production of precise ENC

Abstract Due to an increasing trend of replacing traditional paper navigational charts with electronic ones, requirements for the creation of new ENC have been steadily growing. One example is the precise electronic navigational chart, which is based on accurate mapping of topographic and hydrographic elements. Information about depth of the waters contained on the charts are crucial for the safety of navigation. During the production of precise navigational charts, bathymetric information acquired by a multi-beam sonar system (or swath-bathymetry interferometric system) is used. A multi-beam sonar system emits several signal beams from a single transducer in different directions, which allows to cover a hundred percent of the survey area. The authors of the article carried out an analysis of bathymetric data in terms of differences in their preparation for the production of precise ENC.