twicer ® 28-Feb-2023 10:36

Guidelines on Preventive Measures against Parametric Rolling

Year: 2023
Language: english
Author: ClassNK
Genre: Guide
Format: PDF
Quality: eBook
Pages count: 47
Description: The International Maritime Organization (IMO) issued “Interim Guidelines on the Second Generation Intact
Stability Criteria” – MSC.1/Circ.1627 (hereinafter, SGISc), which specifies criteria for assessing vulnerability
to parametric rolling. A variety of measures for avoiding parametric rolling have also been developed and
recommended, including preparation of tables and polar charts of predicted parametric roll response, installation
of rolling reduction devices, such as anti-roll tanks, and introduction of parametric rolling alert systems.
With this background, Nippon Kaiji Kyokai (ClassNK; hereinafter, “the Society”) decided to publish these
Guidelines, which summarize the requirements to affix the related notations to classification characters of ships
that take effective measures against parametric rolling, together with the related requirements. The Appendices
of the Guidelines also provide a fundamental knowledge of the mechanism, features and points to note in
connection with parametric rolling, an outline of the parametric roll response calculation, an introduction to
devices and techniques for preventive measures against parametric rolling and the method for preparing polar
Edition 1.0 February, 2023



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