scope:

General (1 March 2018)

All vessels are to demonstrate that they have adequate subdivision and stability for the intended service.

The stability of each vessel is to be evaluated for all loading conditions indicated in 3-3-1/15, verifying compliance with the intact and damage stability criteria in Appendix 3-3-A1 and taking into account the design considerations indicated in 3-3-1/15, and the results are to be submitted for review.

When appropriate, such as for vessels that lift heavy weights on or off the vessel stern or other operations that could affect longitudinal stability, the longitudinal intact stability of the loading conditions is also to be investigated.

The maximum allowable KG (or minimum required GM) curve shall confirm compliance with the intact and damage criteria in Appendix 3-3-A1. This curve (or series of curves) shall cover the full range of operation (Load Line/maximum draft to arrival condition, and the full range of anticipated trims). The supporting calculations for this curve shall be submitted for review.

Compliance with a subdivision and stability standard that may be specified by the Naval Administration (e.g., the Naval Ship Code) is considered an acceptable alternative to meeting the requirements in this Chapter, subject to such standards being determined by ABS as being not less effective than the Rules.