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2 TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2 2023

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Vessel-fender contact force modelling for a real-time ship manoeuvring simulator

Moreno F. M., Sasaki H. A. U., Makiyama H. S., Tannuri E. A.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2023

Vol. 17 No. 4

813--820

This paper presents the development of a method for calculating the horizontal contact forces between two bodies in a real-time ship manoeuvring simulator. The method was implemented in the simulator of the University of São Paulo, whose computing core is named “Dyna”. The model proposed calculates restoration and friction forces between bodies and has a Momentum-Impulse based criterion to reduce numerical issues when the simulation numerical integration has large time-steps. The model was empirically evaluated at the simulator by deck officers, in real-time simulations with pilots and tugmasters. We also ran simulations of that model to compare its performance under different integration time-steps lengths.

Risk assessment of port manoeuvres of a chemical tanker vessel

Abramowicz-Gerigk T., Hejmlich A., Randak M.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2023

Vol. 17 No. 4

821--827

The development of smart port systems and autonomous navigation is related to the growing interest in the systemic approach to risk assessment of port operations especially for the vessels transporting dangerous cargo. The paper presents the general risk model of port manoeuvres of a chemical tanker vessel. The risk model is based on Bayesian influence diagram allowing to determine the risk dependent on the decisions made with respect to the applied safety options. The conclusions are based on real life near miss examples and discussion of experienced Ship Masters.