Subdivision - Attained Index A
Attained subdivision index A from partial indices at three drafts - ds (deepest), dp (partial), dl (lightest) per SOLAS II-1 Reg. 6.
Attained A
0.7660 -
Margin vs R
0.0660 -
Formula, assumptions, and limits
A must be ≥ R (cargo) or A ≥ R (passenger ship, with N-dependent R). Each A_i = Σ p·s·v over all damage cases at that draft.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Attained at deepest subdivision draft | - | Reg. 6 calculation | |
| Attained at partial subdivision draft | - | Reg. 6 calculation | |
| Attained at lightest subdivision draft | - | Reg. 6 calculation |