A Ship Motion Short Term Time Domain Simulator And Its Application To Costa Concordia Emergency Manoeuvres Just Before The January 2012 Accident

In this paper we will present a simple but reliable methodology for short term prediction of a cruise ship behaviour during manoeuvres. The methodology is quite general and could be applied to any kind of ship, because it does not require the prior knowledge of any structural or mechanical parameter of the ship. It is based only on the results of manoeuvrability data contained in the Manoeuvring Booklet, which in turn is filled out after sea trials of the ship performed before his delivery to the owner. We developed this method to support the investigations around the Costa Concordia shipwreck, which happened near the shores of Italy in January 2012. It was then validated against the data recorded in the “black box” of the ship, from which we have been able to extract an entire week of voyage data before the shipwreck. The aim was investigating the possibility of avoiding the impact by performing an evasive manoeuvre (as ordered by the Captain some seconds before the impact, but allegedly misunderstood by the helmsman). The preliminary validation step showed a good matching between simulated and real values (course and heading of the ship) for a time interval of a few minutes. The fact that the method requires only the results registered in the VDR (Voyage Data Recorder) during sea trial tests, makes it very useful for several applications. Among them, we can cite forensic investigation, the development of components for autopilots, the prediction of the effects of a given manoeuvre in shallow water, the “a posteriori” verification of the correctness of a given manoeuvre and the use in training simulators for ship pilots and masters.

[1]  F. Girosi,et al.  Networks for approximation and learning , 1990, Proc. IEEE.

[2]  Andi Haris Muhammad,et al.  Manoeuvring prediction of pusher barge in deep and shallow water , 2011 .

[3]  Shinya Tanaka,et al.  A study on the accuracy of the recent prediction technique of ship's manoeuvrability at early design stage , 2021, Marine Simulation and Ship Manoeuvrability.

[4]  Shyh-Kuang Ueng,et al.  A ship motion simulation system , 2008, Virtual Reality.

[5]  P. Gubian,et al.  A new unsupervised learning algorithm for the placement of centers in a radial basis function neural network (RBFNN) , 1995, Proceedings of ICNN'95 - International Conference on Neural Networks.

[6]  Mario Piccinelli,et al.  Modern ships Voyage Data Recorders: A forensics perspective on the Costa Concordia shipwreck , 2013, Digit. Investig..

[7]  E. Moyano,et al.  Parameter estimation of ship linear maneuvering models , 2011, OCEANS 2011 IEEE - Spain.

[8]  A. Y. Sian,et al.  A mathematical model on manoeuvrability of a LNG tanker in vicinity of bank in restricted water , 2013 .

[9]  Paolo Gubian,et al.  Multiparameter time-domain sensitivity computation , 2001 .

[10]  Chamath Keppitiyagama,et al.  A Six Degrees of Freedom Ship Simulation System for Maritime Education , 2011 .

[11]  P Oltmann.  ON THE INFLUENCE OF SPEED ON THE MANOEUVRING BEHAVIOUR OF A CONTAINER CARRIER , 1996 .

[12]  C. Guedes Soares,et al.  Mathematical models for ship path prediction in manoeuvring simulation systems , 2002 .