Damage Stability - Margin-Line Clearance

Margin-line clearance check - in damaged condition, the waterline must not immerse the margin line (76 mm below bulkhead deck at side) per SOLAS II-1 Reg. 7.

DamageMargin lineSOLAS

Bulkhead deck height at sidemDamaged mean draftmDamaged heeldegHalf beamm

Margin line clearance: 0.099m

Result: Pass - margin line not immersed

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\text{clear} = (h_{BHD} - 0.076) - (T_{dam} + y_{half} \tan\theta)

Symbol	Meaning	Unit
$h_{BHD}$	Bulkhead deck at side	m
$T_{dam}$	Damaged mean draft	m
$\theta$	Damaged heel	deg

Source: SOLAS II-1 Reg. 7

In short

Margin-line clearance check - in damaged condition, the waterline must not immerse the margin line (76 mm below bulkhead deck at side) per SOLAS II-1 Reg.

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