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2 New Trends in Production Engineering

2 2018

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Ship’s operational speed on the planned ocean route in real weather conditions

Szelangiewicz T., Żelazny K.

New Trends in Production Engineering

2018

Vol. 1, Iss. 1

159--166

While operating the ship, one of the most important tasks is forecasting the ocean route. For this purpose, the speed characteristics of the ship are used, which are used in specialized computer systems and presented in publications. However, published algorithms for speed (or decrease of speed) calculations of a ship in real weather conditions on given routes are very simplified and do not contain all the relevant parameters related to the ship's hull (affecting its resistance when sailing, eg on waves), its propulsion and weather conditions. The article presents its own, more detailed mathematical model of the speed of the ship, and the performed calculations of speed of the ship were compared with the algorithms available in the literature and with the records from the ship's log.

Mathematical model for predicting the ship speed in the actual weather conditions on the planned ocean route

Szelangiewicz T., Żelazny K.

New Trends in Production Engineering

2018

Vol. 1, Iss. 1

105--112

While operating the ship, one of the most important tasks is forecasting the ocean route. The vessel's speed characteristics are used to predict the route. Commonly used are very simplified algorithms for calculating those characteristics in which only a few basic ship parameters are used. The article presents a more detailed mathematical model for forecasting the speed of the ship in real weather conditions. This model requires more detailed geometric data of the ship and its propulsion (propeller and propulsion engine), but this data is available for operating ships.