Portsmouth Formulas

PORTSMOUTH YARDSTICK
Table II

BEAUFORT NUMBERS AND WEIGHT FACTORS

Beaufort Number		Weight Factor except Multihulls		Weight Factor Multihulls
	BN		WF		WF
	0		0.33		0.33
	1		0.61		0.61
	2		0.88		0.75
	3		1.00		0.88
	4		0.88		1.00
	5		0.61		0.88
	6		0.33		0.61
	7		0.14		0.33
	8		0.04		0.14
	9		0.01		0.04
	X (Unknown BN)		0.28		0.28

(See Section III C)