Bales Seakeeping Rank

Bales seakeeping rank from ship geometry - a scalar metric that combines L, B, T, C_WP, C_VP to rank hull forms for seakeeping quality in the North Atlantic.

BalesSeakeepingRank

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

R_s = 8.42 + 45.1 C_{WP} + 10.1 C_{VP} - 378 T/L + 1.27 B/T - 23.5 C_{WP} T/L - 15.9 C_{VP} B/L

Symbol	Meaning	Unit
$C_{WP}$	Waterplane coefficient
$C_{VP}$	Vertical prismatic coefficient

Source: Bales N.K. - NAME 1980

In short

Bales seakeeping rank from ship geometry - a scalar metric that combines L, B, T, C_WP, C_VP to rank hull forms for seakeeping quality in the North Atlantic.

Learn the theory Seakeeping: Ship Performance in Waves