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1
Content available remote Simplified Method for Estimating Maximum Ship’s Draught when Navigating in Shallow Water on the South of Stolpe Bank in the Aspect of the Vessels with Maximum Dimensions and Draught
Rutkowski G., Królikowski A.
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
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2010
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Vol. 4, no. 4
405--414
EN
This paper considers analysis of maximum draught of a merchant vessel, which can maintain safety of navigation in different exterior condition (average and extreme) on shallow water in Stolpe gutter and keep required under keel clearance, i.e. navigational reserve of depth. To depict maximum draught of a vessel we use practical method which incorporates risk of navigational and model of ship’s domain. Results are compared with guidelines published by Decree of Minister of Transport and Maritime Economy from 01.06.1998 about technical conditions, which should be met by hydro mechanical sea structure, which operate vessels with the given particulars.
2
Content available remote Low Sea Level Occurrence of the Southern Baltic Sea Coast
Stanisławczyk I., Kowalska B., Mykita M.
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
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2010
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Vol. 4, no. 2
199--204
PL
The level of 440 cm is defined as the upper limit of low sea level. This value is also accepted as the warning level for navigation, according to the NAVTEX. The low sea levels along the southern Baltic Sea coast were analyzed in the years 1955 – 2005. Lowest values recorded ranged from 309 cm in Wismar to 370 cm in Kołobrzeg. The phenomenon was chiefly generated by hurricane like offshore winds. Extremely low levels were not frequent, their occurrence did not exceed more than 0,3% in Świnoujście and not more than 1% in Warnemünde. In summer months these phenomena occurred extremely seldom, they were more fre-quent in the western, than in the eastern part of the coast. Long-term variation and statistical analysis was pre-sented. Probability of low sea levels occurrence was calculated by Gumbel method and percentile distribution for 4 gauge stations was analyzed. The calculations revealed that, for instance, in Warnemünde once in 20 years the minimum sea level can be as low as 358 cm.
3
Content available remote Development of Decision Supporting Tools for Determining Tidal Windows for Deep-drafted Vessels
Eloot K., Vantorre M., Richter J., Verwilligen J.
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
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2010
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Vol. 4, no. 3
323--330
EN
A decision supporting tool named ProToel for determining tidal windows for deep-drafted ves-sels arriving at or departing from the Belgian harbours, based on both deterministic and probabilistic criteria, has been developed. The program is presently being evaluated as a short-term decision tool by the pilots and waterways authorities for optimising the shipping traffic to the coastal harbour of Zeebrugge. The software can also be applied for long-term considerations, as is illustrated in the case of the port of Antwerp. Some re-flections are made considering the extension of the tool to include other factors that may affect the safety of shipping traffic, such as interaction with banks and with other shipping traffic.
4
Content available The Criterion of Safety Navigation Assessment in Sea-River Shipping
Galor W.
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
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2009
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Vol. 3, no. 4
381--384
EN
Sea–river ships can connect the area inside of land with oversea places without of indirect trans- shipment. In many cases the sea-river ships move on waterways (natural and artificial) inside of land for hundreds kilometres. Navigation in inland waters has to meet the same requirements as those for pilot navigation. This is due to the relations between the ship size and other objects on water area. These ones caused the navigation more hard then on open seas. The paper presents the criterion of safety assessment of navigation during sea-river ships manoeuvring ship in inland waters.
5
Content available Probabilistic Model of Underkeel Clearance in Decision Making Process of Port Captain
Gucma L., Schoeneich M.
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
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2008
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Vol. 2, no. 2
167--171
EN
The paper presents practical implementation process of developed probabilistic model of ships underkeel clearance. The model was implemented in “on-line” version and could be used for decision making process of harbour captain in everyday practice. The paper presents the results of validation of the model and the practical guidelines of use in decision making process.
6
Content available remote The model of ship movement while touching the sea-bed
Galor W.
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
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2007
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Vol. 1, no. 4
413--418
EN
When a ship hits the sea-bed then it’s hull pressing on ground. It caused the reversible passive ground reaction. The consequences of such event can result the ships hull damage. The paper presents of detailed model of ships movement while touching the ground. The pressure on ship hull and parameters of trajectory (ploughing and penetration) are determined.
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