Sensitivity analysis of the tool for assessing safe manoeuvrability of ships in adverse sea conditions

Mizythras, P. and Boulougouris, E. and Priftis, A. and Incecik, A. and Turan, O. and Reddy, D.N. (2016) Sensitivity analysis of the tool for assessing safe manoeuvrability of ships in adverse sea conditions. In: International Conference on Shipping in Changing Climates 2016, 2016-11-10 - 2016-11-11.

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    Abstract

    In 2013, International Maritime Organization (IMO) introduced the Interim Guidelines for determining the minimum propulsion power to maintain the manoeuvrability of ships in adverse conditions. Considering the sufficiency of propulsion system in adverse sea conditions, the European project SHOPERA has developed alternative processes and tools for assessing safe manoeuvrability of ships. The main objective of these procedures is to identify the critical conditions where the vessel maintains its course keeping and manoeuvring ability at the vessel available propulsion power by using basic ship design values as input into the simplified methods proposed. Outcomes of this project were submitted and discussed in the 70th session of IMO’s Marine Environmental Protection Committee. In this paper, a brief description of these new assessment procedures is presented and a sensitivity analysis is conducted. The analysis is performed for a range of different open water propeller and hull resistance characteristics, hull – propeller interaction factors and engine power limit values, investigating the influence of these various performance parameters on the performance of the vessel.