Required Subdivision Index R (Cargo)

Required Subdivision Index for cargo ships per SOLAS II-1 Reg 6: R = 1 − 128 / (Ls + 152).

Damage stability

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Formula, assumptions, and limits

R = 1 - \frac{128}{L_s + 152}

Symbol	Meaning	Unit
$L_s$	Subdivision length	m
$R$	Required subdivision index

Source: SOLAS II-1 Reg 6

Required Subdivision Index for cargo ships per SOLAS II-1 Reg 6: R = 1 \u2212 128 / (Ls + 152).