Underlying risks possibly related to power/maneuverability problems of ships: The case of maritime accidents in adverse weather conditions

01/25/2017 - 11:00-01/25/2017 - 12:15


Nikolaos Ventikos
(National Technical University of Athens)
Konstantinos Louzis
(National Technical University of Athens)
Alexandros Koimtzoglou
(National Technical University of Athens)
Eirini Stamatopoulou

The establishment of regulatory requirements from the International Maritime Organization to effectively control and limit toxic gas emissions from ships, has sparked the debate of whether ships, when complying with these requirements by simply derating the main propulsion engine, are adequately equipped to safely operate in various weather conditions. This study deals with assessing and analyzing the risk of navigational accidents, i.e. collisions, groundings and contacts, that occurred under adverse weather conditions and may have been related to the lack of sufficient powering and maneuverability. The risk assessment methodology that has been developed for this study is based on the concept of risk triplets that are used to connect an adverse scenario to the frequency and the resulting consequences. The adverse scenarios are defined using a set of parameters, including ship type, size, class, accident type and installed main engine power. The implementation of risk triplets allows a more detailed assessment of the accident risk and incorporate enough information for producing various graphical risk curves that are used to compare the different adverse scenarios and focus on the ones with the highest risk. The study concludes with interesting results regarding high risk ship types and insights that can be used to strengthen the case for science-based policy making in the maritime industry.

The work presented in this paper was partly supported by the Collaborative Project (Grant Agreement number 605221) SHOPERA (Energy Efficient Safe SHip OPERAtion) co-funded by DG Research of the European Commission.