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Righting Arm Curve
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Input Vessel
Data in Yellow Cells
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Value, SI Units
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Range
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Value, US Units
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KG, m
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0 < 40
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L, Vessel
Length, m
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2 < 200
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B, Vessel
Width, m
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1 < 100
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D, Vessel
Depth, m
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0.1 < 50
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Number of
Raked Ends (enter 0, 1, or 2)
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0, 1, 2
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D1, Depth
Headlog
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0 < 0.9 x D
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L1, Length
Bow Rake
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0 < 0.3 x L
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Tspec, Draft
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0 < 0.95 x D
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Mass Density
Water
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1000 < 1200
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Calculated
Displacement, MT
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Vol1, Vol.
Below Water = (Llb+Lwl).B.T/2
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SMALL ANGLE STABILITY RESULTS
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GM
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CB, Block Coefficient,
raked ends
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LARGE ANGLE STABILITY RESULTS
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θ, Inclination for Single Result,
deg
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Range 0 < 80
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GZ-1 at θ Selected
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Wind Speed
for Wind Heeling Calculations
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qMAX Max Righting Arm occurs at
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Critical
Righting Areas
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ft.deg
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m.deg
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Checks
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Calculated
Area from 0 deg to qMAX deg1
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If qMAX is less than 40º, qMAX controls CFR checks
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46 CFR 173 Protected Waters
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Required Area
from 0 deg to qMAX deg
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46 CFR 173 Exposed Waters
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Required Area
from 0 deg to qMAX deg
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Ld,0-15, Righting Area
from 0 to 15 deg
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Ld,0-30, Righting Area
from 0 to 30 deg
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Ld,0-40, Righting Area
from 0 to 40 deg
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Ld,0-45, Righting Area
from 0 to 45 deg
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Ld,30-40, Area from 30 to
40 deg
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Ld,30-45, Righting Area
from 30 to 45 deg
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Required Area
from 0 deg to qMAX deg
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q, deg
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GZ, ft
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GZ, m & Checks
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qMAX Max Righting Arm occurs at
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Deck Edge
Submerges at
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qf, 1st Downflooding at
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GZ30, Righting Arm at 30
deg
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GZ40, Righting Arm at 40
deg
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q, deg
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GZ, ft
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GZ, m
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q1, 1st Intercept Angle and GZ
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q2, 2nd Intercept Angle
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AR, Residual to 40 deg or
qf / A40 or Af
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Area[A + B] /
Area[B + C] w/o downflooding
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Area[A + B] /
Area[B + C] w/downflooding
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AR, Residual to GZMAX w/o downflooding
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AR, Residual to 40 deg or
qf
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AR, Residual to 40 deg or
qf
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