Marine Stability Criteria: ISO_12217
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 |
|---|---|---|---|---|---|---|---|
| ISO_12217 | sailing_yacht#GM_minimum#intact | intact | ISO 12217-2: GM₀ ≥ 0.150 m for Design Category A sailing monohull. | GM_minimum | m | 0.15 | sailing_yacht |
| ISO_12217 | sailing_yacht#GZ_area_0_to_30#intact | intact | ISO 12217-2:2022 Part 2 (sailing boats ≥ 6 m): GZ area 0–30° ≥ 0.055 m·rad minimum for Design Category A/B. Aligned to IS Code for larger craft. | GZ_area_0_to_30 | m·rad | 0.055 | sailing_yacht |
| ISO_12217 | sailing_yacht#angle_of_vanishing_stability#intact | intact | ISO 12217-2: sailing monohull must have vanishing stability angle ≥ 90° to qualify for Category A (ocean). Multihulls must pass capsize volume test instead. | angle_of_vanishing_stability | deg | 90 | sailing_yacht |
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