5.4 Dynamic stability
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Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1329 – Guidelines for Uniform Operating Limitations of High-Speed Craft – (11 June 2009) - Annex – Guidelines for Uniform Operating Limitations of High-Speed Craft - 5 Sea State Limitations – Significant Wave Height - 5.4 Dynamic stability

5.4 Dynamic stability

  5.4.1 Safe operation of most high-speed craft is significantly affected by the sea state. Safe seakeeping limitations may be as a result of some of the examples listed in paragraphs 2.1.5 and 17.5.4.1 of the Code, including most particularly: propensity to deck diving or broaching; incidence of hull or wet-deck slamming; plough-in, yawing and turning. Refer to the guidance information in appendix 2 in relation to operations in following and quartering seas.

  5.4.2 Implied but not explicit these limitations should also include excessively violent motions affecting the passengers and crew (see also section 5.6 of these Guidelines).

  5.4.3 Paragraph 18.1.3.2 of the Code requires that the Administration be satisfied that the operating conditions on the intended route are within the capabilities of the craft. This should be verified during the trials conducted in accordance with annex 9 and invoked by paragraph 17.2.1 of the Code.

  5.4.4 Administrations should note that paragraph 3.1.2 of annex 9 of the Code explicitly states that “worst intended conditions, referred to in 1.4.57 of this Code, are those in which it shall be possible to maintain safe cruise without exceptional piloting skill. However, operations at all headings relative to the wind and sea may not be possible”. This provision should be taken into account when setting operating limitations in relation to dynamic stability.

Parent topic: 5 Sea State Limitations – Significant Wave Height
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