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Prismatic Coefficient (Cp)

Longitudinal fullness - Cp = Cb / Cm. A finer stern/bow has lower Cp; a parallel mid-body ship has higher Cp.

StabilityForm coefficient
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Formula, assumptions, and limits

CP=CBCMC_P = \frac{C_B}{C_M}
SymbolMeaningUnit
CBC_BBlock coefficient
CMC_MMidship section coefficient
CPC_PPrismatic coefficient

Source: SNAME - PNA Vol I Ch.2

In short

Longitudinal fullness - Cp = Cb / Cm.

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