Piotr Zwolan

A Vessel's Mathematical Model and its Real Counterpart: A Comparative Methodology Based on a Real-world Study

Navigation and manoeuvring simulators are increasingly being used in research centres to conduct complex navigation experiments and analyses. The structure and capabilities of simulation software make it possible to reproduce any conditions, including weather conditions. The complex mathematical models of marine environmental conditions that are being implemented nowadays take into account various sea wave models, which makes simulation tests more realistic. This paper deals with issues related to evaluating and verifying vessel simulation models based on real-world studies. As a result of the present research project, a methodology for comparing vessel simulation models with their real-life counterparts was developed. A measurement platform was created for the purpose of carrying out real-world studies; it is available at the Institute of Marine Navigation and Hydrography of the Polish Naval Academy. One important research step involved developing a procedural algorithm for making real-world measurements. This paper presents the results of using this platform in comparative tests of the manoeuvring elements of real and simulated vessels.

ABPP Motion Simulator Based on 3D ENC

Abstract A research focused on development of numerical model of a sea area destined for a motion simulator of an Autonomous Biomimetic Underwater Vehicle (ABPP) is presented in the paper. There are purpose, construction and functionality of the ABPP motion simulator generally characterized in the introduction. The first part contains description of a method of creating the sea area model based on the data included in the Electronic Navigational Chart (ENC). A method of displaying the sea area model in the ABPP motion simulator, with a use of the Open GL graphic library, is described in the second part. Finally, there are conclusions drawn from the executed research given at the end.

Jamming as a threat to navigation

Abstract The whole world is dependent on satellite systems as they are used in almost all fields of economic and social life, in transport, banking, industry, agriculture, etc. Thanks to the development of technology, most smartphones used everyday have been equipped with a built-in GNSS receiver, many cars with navigation systems and all vessels with GNSS receiver or a satellite compass for navigation. Systems working on similar frequencies can be used for jamming or spoofing satellite systems. Such purposeful system jamming can be damaging to users and society as a whole. This article includes a description of jamming and a presentation of one of possible receiver designs allowing for jamming signal detection. This receiver has been designed and built by the authors of the article.

Methodology of Creation the Simulation Basin based on the Projected Canal through the Vistula Spit

Abstract The biggest problem in the process of implementation of the new sea areas project or aids to navigation systems is to check the assumptions without compromising security on real waters. Today, digital models are available for easy and inexpensive replacement of the research methods used so far. For this purpose the navigational and maneuvering simulators are perfect. Simulators as a research tools allow you to define a more realistic and accurate data for the study and evaluation sea areas. The purpose of the simulation is to identify and reduce the risk for seafarers during navigation on the waterways, canals and port areas. These include quantitative and qualitative assessment of the canals and fairways construction. The main requirement for a simulation system is to have a multi-task simulation software, which includes effective tools for repositioning and designing safe waterways and port infrastructure. The Institute of Navigation and Maritime Hydrography of the Polish Naval Academy since the eighties of the twentieth century is carried out projects in the field of navigational and hydrographic support of human activities at sea. This is possible thanks to the extensive set of simulation tools. Planning this tasks in a simulators software environment allow not only to design of virtual counterparts of real sea areas, but also to evaluate the quality of manufactured parts before their actual exposure to sea areas.

Harbour Infrastructure Inventory Development with 3D Laser Scanning Method

Abstract In the Polish law harbour infrastructure is one of key elements to determine the various cargo types, available means of transport and, ultimately, the significance of any sea port. The structures, devices and installations situated within a port’s boundaries, dedicated to the swift operation of the port, are all designed for tasks that involve the best use of this infrastructure. The proper development and modernization of this infrastructure may well result in improved cooperation with road networks and transportation on land. Owing to modern technology, it is possible to scan the surrounding buildings or location with great accuracy and render three-dimensional models of the scanned objects. These models can be used to generate harbour maps with a detailed 3D picture of the entire port and navigational infrastructure. The authors of this article present the possible applications of modern laser scanning technology in port infrastructure surveying, and in particular in the survey of a complicated wharf line on the Motława River along Długie Pobrzeże Street in Gdańsk.

Present Status And Tendencies In Docking Systems’ Development

Abstract The process of the ships docking, especially very large ships, is an very risky operation in confined and busy port waters. The similar difficult is the task to pass along any channel, river, strait or similar water road. The basic difficulty causes maneuvering with the great mass of the ship in situation of small space to maneuvers, the large inertia of the object and poor maneuvering properties at small speeds occurring in such circumstances. An additional factor, which make this task more difficult is the influence of the wind and the sea current on the hull of the inert ship as well as consequences of the limited visibility. The bad weather can cause the necessity to delay the maneuver. However this joins with heavy costs. An alternative is usage of systems supporting this process. In this paper nowadays accessible systems for augmentation the docking and harbor navigation are analysed. There are: shore based (active or passive) and ship based (active). This paper is prepared in the frame of Bonus project call 2012 ‘The Captain Assistant system for Navigation and Routing during Operations in Harbor’.

EVALUATION OF VESSEL SIMULATION MODEL COMPATIBILITY WITH ITS EQUIVALENT IN REALITY

ABSTRACT Complex simulation systems are often used in order to enhance the safety level on newly designed navigation areas and to facilitate their verification process. The application of these systems supersedes older methods based on manoeuvring basins, wherein models minified in particular scales were used. Modern methods are definitely cheaper and require less work. The paper presents the method of assessment of the compatibility of a ship simulation model with its real counterpart. Access to the simulator’s components responsible for creating and editing bodies of water as well as ship models gives the possibility of their verification. Using cutting-edge navigation systems such as inertial systems, weather stations and GPS gives the possibility of obtaining indispensable information about ship’s behaviour under certain hydro-meteorological conditions. STRESZCZENIE Złożone systemy symulacyjne są często używane dla poprawy poziomu bezpieczeństwa na etapie projektowania nowej infrastruktury nawigacyjnej, jak również dla ułatwienia procesu ich weryfikacji. Stosowanie tych systemów zastępuje starsze metody oparte na pomniejszonych modelach fizycznych i basenach modelowych, w których je testowano. Nowoczesne metody są zdecydowanie tańsze i wymagają mniej pracy. Artykuł przedstawia metodę oszacowania zgodności modelu symulacyjnego statku z jego rzeczywistym odpowiednikiem. Dostęp do komponentów symulatora odpowiedzialnych za tworzenie i modelowanie akwenu oraz modele statku daje możliwość ich sprawdzania. Jest to możliwe dzięki użyciu najnowszych systemów nawigacyjnych, takich jak systemy inercjalne, stacje meteorologiczne i GPS, które umożliwiają otrzymywanie niezbędnej informacji o zachowaniu się statku w konkretnych warunkach hydrometeorologicznych.