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Comprehensive method of formal safety assessment of ship manoeuvring in waterways

Gucma S., Ślączka W.

Zeszyty Naukowe Akademii Morskiej w Szczecinie

2018

nr 54 (126)

110--119

The following paper presents an original, universal method of formal safety assessment of ship manoeuvring in sea waterways. The method allows evaluation of a ship’s formal safety assessment on various types of waterways. It may be a basis for standardizing the methods of performing the ‘navigational analyses’ which are required in Poland.

The area-dynamic approach to the assessment of the risks of ship collision in the restricted water

Guze S., Smolarek L., Weintrit A.

Zeszyty Naukowe Akademii Morskiej w Szczecinie

2016

nr 45 (117)

88--93

In this paper, two indexes for own ship risk collision assessment in the restricted water are proposed. The first one concerns the collision threats for ships. The second one describes threats that are generated by human error. It is carried out dynamically with accordance to changes in time. To realize the main aim of the paper, the definition of the extended domain of the ship is introduced. Furthermore, the rules to determine the indexes and range of their values are developed. Finally, a comprehensive model and its potential application are presented. There are some important things to take into account during the model development: the interface, the levels and type of the output information, the type and accuracy of the information about the position and movement dynamics of the particular ships. It gives the opportunity to consider the different operation levels. In addition, it also allows us to take into account the different levels of measurement and the collision risk warnings. This approach can be helpful for both the VTS operator and OOW, the ship’s navigator, as the tool to support the safe navigation in restricted water.

Steady State Ship Attitude during Manoeuvres in a Bank Vicinity

Artyszuk J.

Zeszyty Naukowe / Akademia Morska w Szczecinie

2004

nr 2 (74)

45-57

The existing regression models on the bank (wall) effect are compared to one another both dynamically (force level) and kinematically (counteracting helm and hull drift attitude during a steady-state passage along a bank). A small chemical tanker of known hull and rudder hydrodynamics is used as an example of computations. A lot of essential qualitative and quantitative discrepancies have been found, which might claim the regression models of little use in an adequate bank effect simulation. Further research is required in this field.

Przeprowadzono symulację efektu brzegowego w kanale dla małego chemikaliowca, wykorzystując dostępne modele regresyjne tego zjawiska. Główny nacisk położono na wielkość dryfu i wychylenie steru potrzebne do zrównoważenia efektu brzegowego podczas ustalonego ruchu jednostki poza osią kanału. Stwierdzono zasadnicze różnice między poszczególnymi modelami, co uniemożliwia uzyskanie prawdziwego ilościowego obrazu zjawiska. Konieczne są dalsze prace nad modelowaniem efektu brzegowego.