A new method for updating the deviation table of a magnetic compass on any heading is proposed. The ma-thematical description of the method is presented. The accuracy of the restoration of factors B and C is inves-tigated. The requirement of acuracy for instrumental observation is formulate

The topic of the publication is the presentation of the detection method and identification of every kind of environmental threats such as: pollutants or environmental contamination, causing changes of reflection property of ground, water, atmosphere surface, their locating and the monitoring of changes. This method is based on remote sensing measuring techniques as well as on using Geographic Information System (GIS) tools. It is based on the application of a monochromatic digital camera working in the 300–1100 nm range and equipped in a tunable filter. The point is to work out the automatic control system of the camera-filter set. Imageries gained in a few hundred spectral ranges were preliminary process depending on choosing few ranges with optimum image parameters. These data are transmitting to the automatic control system of camera-filter set

During ship navigation on waves its relative motions occur which result in propeller emergence. This, in consequence, causes the propeller thrust drop. The article presents the results of calculations of the propeller thrust drop and ship service speed reduction on a preset ocean route where specific mean statistic weather parameters occur

This paper presents the methodology of constructing a collision avoidance plot “ship – tropical cyclone”. The computational algorithm and its testing results are presented. The tests make use of information from the voyage of the ship “Diana” and weather reports and forecasts on the real tropical cyclone Bill, which moved in August 2009 across the North Atlantic

The paper presents some selected results of research on applications of artificial intelligence to the optimization of main ship design parameters and hull shape coefficients with the ship transport efficiency as an objective function. Basics of ship transport formulation are concisely discussed, together with examples for different approaches to optimization. An example of neural network use for the determination of ship transport efficiency is given with an assessment of its ability for data generalization. Moreover, two optimization procedures are presented: one using genetic algorithms and the other with simulated annealing approach. Both procedures lead to the improvement of ship transport efficiency

The paper defines the meaning of local and average heat transfer coefficient. The most frequently applied experimental methods for its estimation, particularly between the fluidized bed and the surface immersed in it, are presented. The method for the estimation of the influence of position and movement of fluidizing column on heat transfer coefficient is propose

This article is an overview aimed at a synthetic description of computational mathematics applications in marine navigation. The presented classification of algorithms is based on their application in specific fields of marine navigation. The literature referring to each group of algorithms is then discusse

In connection with the current investment project of building an liquefied natural gas (LNG) terminal in Świnoujście, an analysis of design solutions and operational features of the potential variant of an LNG carrier supplying gas from the Persian Gulf areas has been conducted. As a result of studying the waterway restrictions on the assumed route, the article presents the concept of the optimum LNG carrier size – its overall dimensions – along with an analysis of design parameters. A hull shape model was used to examine the hull resistance and propulsion system. Besides, the size of the ship engine room was estimated and the power demand of the main propulsion system was determined. The cost patterns of LNG carrier construction and operation was included as well as the estimated mean value of its construction unit cost

The statistical analysis of existing data of similar ships is an effective tool for an initial estimation of principal parameters of a ship to be designed. High values of the correlation coefficient could signify that a high level of geometric and weight similarity occurs. If this statement is proved and supported by other premises, it means that there is a possibility to create statistical relations allowing to estimate the parameters of ship being designed with a high level of accuracy. This paper presents such case concerning membrane LNG tankers. The resulting parametric relations could be used for the creation of coherent design variants useful for the process of multicriterial optimization of these ships

In this paper, an attempt has been made to present National Maritime Safety and Security Systems. Such systems have been established as a result of close cooperation of national maritime services and ships themselves. Such systems operate in national maritime areas of particular states, regardless of EU membership. The history of the development of above mentioned systems is much longer than the history of the International Maritime Safety and Security System. However, the organizational and functional structure of these systems has been scarcely presented in the shipping literature . Therefore, the main objective of this paper is to bring these issues closer to the public attention

The paper presents methods and models used for analysis of ships traffic in north of Bornholm Traffic Separation Scheme. Ships’ traffic has been analyzed by means of statistical methods with use of data possessed from AIS data obtained from HELCOM. The paper presents probabilistic models of ships’ traffic spatial distribution and its parameters. The results could be used for safety and risk analysis models in given area and for creation of general models of ships’ traffic flows

This article states theoretical assumptions for the method of identifying disadvantageous evacuation times from ships relating to diversified populations of passengers. The influence of age, sex and physical fitness of people is examined. The presented optimization uses the genetic algorithms method as well as Genetic Algorithm and Direct Search Toolbox included in Matlab software. Examples of calculations of the time of passenger evacuation from a passenger ship are given to verify the operation of the developed metho

The method for automatic compensation of deviation on any heading is proposed for a Fluxgate compass. The mathematic description of the method is given along with a block diagram of the method implementation. Following an analysis of the accuracy, recommendations for achieving proper accuracy are presente

These authors present operational and safety aspects of research problems relating to waterway intersections and their safety and operational aspects. Attention is drawn to delay times that occur in the process of vessel traffic and the probability of close quarter situations. The results of simulations are compared with analytical research. Examples are given of real values of both system and traffic process measures

The authors describe methods of presenting seasonal information on the occurrence of cyclones (typical tracks shown on Routing Charts, climatic routes and areas of cyclone formation according to NOAA). Besides, a spatial presentation of weather situations including cyclone tracks and the stages of their development understood as intensities are proposed. The relevant zones have been determined on the basis of cyclone data from 1998–2007. The zones indicate areas of potential tropical disturbances on the ocean, thus depicting the areas of the most probable cyclone threats