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1
Content available Modified integer model for solving the master bay problem
Tsymbal M., Kamieniev K.
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
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2021
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Vol. 15 No. 4
749--753
EN
One of key components in keeping a ship seaworthy is a correctly prepared cargo plan. Considering the recent cost cutting measures and reduced transportation volumes relevance of optimizing such a plan cannot be understated. Though there’s a number of studies addressing the issue none of them covers all the operational and constructional constraints necessary to factor for. This article presents an integer model that tries to address some of the constraints missed by other researches. A method for solving the model is designed and developed based on a steady-state genetic algorithm. A numerical experiment is conducted showing the method’s feasibility.
2
Content available Identification of weak links in the ECDIS - operator system based on simulator training
Pipchenko O., Burenkov O., Tsymbal M., Pernykoza V.
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
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2021
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Vol. 15 No. 1
83--88
EN
Statistics, based on grounding incident investigations, is not always sufficient for retrieving objective information and designing comprehensive solutions for improving the ECDIS training process for deck officers and development of methods aimed at reducing the grounding incident rate and improving the effectiveness of navigation. The research studies statistics on deck officers` errors made during training on bridge simulators equipped with ECDIS and provides an analysis of errors distribution among navigators of different ranks. The study shows that in event of the EPFS (Electronic Position Fixing System) failure the likelihood of grounding increases dramatically for all deck officers, irrespective of rank and experience, despite having fully functional radar and ECDIS in dead reckoning mode.
3
Content available Features of an ultra-large container ship mathematical model adjustment based on the results of sea trials
Pipchenko O. D., Tsymbal M., Shevchenko V.
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
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2020
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Vol. 14, no. 1
163--170
EN
The research addresses the problem of an ultra-large container ship mathematical model adjustment based on sea trials. In order to verify the model’s adequacy, simulated data had to be compared to the trial report data, which was obtained in ballast condition with significant trim. In such circumstances, model coefficients cannot be calculated by known methods and have to be corrected as per trial data. It is proposed to determine translational motion coefficients first. To get optimal results, it was also proposed to divide the objective function into kinematic and dynamic components, with each component being assigned a weighting factor. A separate objective function component was assigned to the zig-zag maneuver, which includes the first and second overshoot angles.
4
Content available Recommendations for Training of Crews Working on Diesel-Electric Vessels Equipped with Azimuth Thrusters
Pipchenko O. D., Tsymbal M., Shevchenko V.
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
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2018
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Vol. 12, no. 3
567--571
EN
This study addresses the problem of training the officers, which are assigned to an electrical-driven vessels equipped with azimuth thrusters. A pair of omnidirectional thrusters in combination with power plant system containing several diesel generators imply a potential for a variety of different emergency scenarios, which also includes partial or full loss of control or blackout. These fault scenarios were classified in the article with predefined risk levels depending on the area, time limitation, mode of operation and fault itself. Mutual responsibilities and action algorithms for bridge and engine teams in a step-by-step manner have been developed for each scenario. Personnel behavioral differences in both expected and unexpected emergencies have also been studied.
5
Content available Safety of Navigation During Dynamic Positioning on Mobile Water Transport Objects
Gabruk R., Tsymbal M.
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
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2016
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Vol. 10, no. 1
59--67
EN
This paper presents an innovation methodology for quantity assessment the safety of dynamic positioning in locally confined area of technological work performance under nonlinear dynamic disturbances of environmental factors. The methodology is based on new integrated paradigm of prediction coordinated components interactions, which form dynamic positioning system. Proposed methodology implementation effect is based on the analysis of complex models that form the knowledge base. The comprehensive reserve of controllable thruster’s reactions was adopted as quantitative characteristic of dynamic positioning safety.
6
Content available Method of Safe Returning of the Vessel to Planned Route After Deviation from Collision
Tsymbal M., Urbansky I.
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
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2009
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Vol. 3, no. 1
81--84
EN
Flexible strategies for collision avoidance, presented at TransNav 2007, were examined using computer program for its correctness in different situations of ships interaction. It was determined, that on short distance the risk of collision can arise again when the vessel returning to the planned route after deviation from collision. For controlling ship’s safe returning, the mathematical model was developed. This model describes the analytical dependence of the rate of changing relative course with respect to rates of turning of the vessels and its initial relative position. This method can be used in automatic systems for controlling the safe returning of the vessel to the planned route.
7
Content available remote Method of synthesis of flexible strategies for preventing collisions
Tsymbal M.
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
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2007
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Vol. 1, no. 3
305--310
EN
Flexible strategy is the method, which allows forming a strategy of the operating vessel for avoiding collision, when navigating in congested waters and the risk of collision with more than one vessel exists. This strategy does not conflict with the ColReg requirements and take into account multi-variant approach of conduct of targets and possibility of worsening of situation in time. The methodological base for the solution of this problem is the theory of the dynamic n-guided systems.
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