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

This author presents the results of an analysis of the effect of directly measured quantities and their measurement (standard) deviations on the value of the total measurement uncertainty of roundness deviation. The methods described refer to the determination of roundness deviation based on the mean square element and basic mathematical transformations and relationships that provided a basis for the analysis. Its results are given in the form of diagrams followed by final conclusions

One of the most common problems in the process of traffic management is the determination of the proper traffic volume. On the one hand there is a tendency of increasing traffic volume – it brings profits to all subjects involved in the transportation process. On the other hand there is a tendency to decrease traffic volume – it assures better safety. It is necessary to solve the problem of finding a compromise between those tendencies. Solving this problem is possible, based on developed methods of safety dimensioning that use the concept of traffic smoothness for quantitative evaluation of traffic safety level. In the paper the concept of those methods is explained. Besides, presented are results of simulation research on the relation between traffic smoothness and the safety level in a restricted control sector. Although the paper presents the implementation (examples) of the problem in the air traffic management, similar procedures and methods may be applied to the marine traffic

During ship’s navigation on waves some relative motions occur resulting in propeller emergence, which in consequence reduces the propeller thrust. The article presents an algorithm for calculating the propeller thrust reduction as a result of ship motions on waves. The algorithm has preset parameters: significant wave height HS, period T1 and geographical direction

The article presents a preliminary estimation of the possibility of using Stirling engines in power and waste heat utilization systems of LNG carriers. Flexibility of applying heat sources, very silent operation and very low exhaust gas emission are to the advantage of applying Stirling engines in marine power plants. Unquestionably, one strong point of Stirling engines is the fact that various heat sources can be used to feed them, including waste heat generated by the main and auxiliary engines and burning boil-off gas (evaporated cargo), which is especially important in the LNG carrier power systems. The discussed issues include gas demand by the main propulsion of LNG carriers together with the amount of boil-off, main propulsion power and electric power demand of LNG carriers of various sizes. Finally, an example system for waste heat utilization and reduction of toxic exhaust gases emission of the employing a Stirling engine is describe

The paper presents the results of experimental investigations of the flow generated by the controllable pitch propeller. The influence of the propeller pitch, rate of turn and rudder angle on the velocity filed measured behind the rudder for two different water depths were investigated. The model tests were carried out using twin propeller twin rudder car-passenger ferry model in 1:16 scale. The results of the experimental analysis allowed for the quantitative assessment of the velocity components distribution. The predicted flow field generated by the propellers near the quay wall during unberthing has been computed using CFD methods

This paper is aimed to clarify the notion of instant pivot point (as being well established in rigid body mechanics) and review its application in practical ship manoeuvring. The extension of the Vasco Costa original results to arbitrary initial ship manoeuvring motions is performed and a transient phase of the pivot point change is studied, especially with regard to ship crash stopping and turning (including inter alia a bow thruster application)

The brand new technologies more frequently revolutionize the conservative fields of the navigation, such as ECDIS for instance. The term of “E-Navigation” in the different forms is omnipresent in the major parts of navigation, tried to substitute old-fashion technologies. The pilotage service is one of them, remains immutable in its novelty and stays conservative from many years. The author focused on the technical aspects of the system named Remote Pilotage System, as an aid to the in-shore and sea piloting methods. The content of this article is focused on the analysis of methods for the voice-way information communication to the navigator and the different interface figuration for the pilot. The described researches are the part of holistic method of navigational information communication analysis for the Remote Pilotage System Interface

The paper presents method of safety water depth evaluation for ship approaching to ports. The method utilizes two models: real time simulation model used for determination of ships speed approaching to given port, and Monte Carlo model for determination of probability of accidental collision with the bottom. Minimal safety depth has been calculated with use of probabilistic acceptance criteria presented in the paper

In the following article the methods for establishing parametres of safe manoeuvring area are presented. The methods are constructed on the basis of deterministic and probabilistic models of ships’ manoeuvring in restricted areas. The reliance level has been established for these methods in which deterministic and probabilistic model of under keel clearance has been use

Navigational systems employed at LNG terminals assist the navigation of gas carriers along approach chan-nels and in port waters leading to LNG terminals. i.e. in restricted waters. The navigation in restricted waters is often referred to as pilot navigation. The term is derived from the fact, that a pilot assists in navigating through restricted areas, and the process of marine navigation the pilot participates is called pilotage