Marine Stability Criteria: IMO_A749
Marine intact and damage stability regulatory criteria from IMO, SOLAS, USCG, ABS, DNV, and ISO standards. Covers GZ righting arm areas, GM minimums, vanishing stability angles, weather criterion area ratios, and maximum heel angles for passenger ships, cargo ships, tankers, fishing vessels, offshore platforms, sailing yachts, and small craft in intact, one-compartment damage, and two-compartment damage conditions.
| criteria source | sk | condition | notes | parameter | required unit | required value (varies) | vessel type |
|---|---|---|---|---|---|---|---|
| IMO_A749 | all_ships#GM_minimum#intact | intact | Initial metacentric height GM₀ must not be less than 0.150 m. | GM_minimum | m | 0.15 | all_ships |
| IMO_A749 | all_ships#GZ_area_0_to_30#intact | intact | Area under GZ curve up to 30° heel must not be less than 0.055 m·rad. Applies to all ships covered by IMO instruments. | GZ_area_0_to_30 | m·rad | 0.055 | all_ships |
| IMO_A749 | all_ships#GZ_area_0_to_40#intact | intact | Area under GZ curve up to 40° (or angle of flooding if less than 40°) must not be less than 0.090 m·rad. | GZ_area_0_to_40 | m·rad | 0.09 | all_ships |
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