# Measurements ## Basic Boat Measurements

* Including Rotating Masts and Boom, when applicable.

## Beam Measurements

• Beam - Width of the beam *

* The maximum width of the boat, including wings, racks, sliding seats or other appendages.  ## Board Measurements

• Standard daggerboard where LB = board depth below hulls (a)
• T Foil daggerboard where LB = addition of both lengths (b + c)
• Curved daggerboard where LB = measured around external circumference (d)

## Main Sail Measurements

CM - Area of Main Sail + Mast

• S1a = ((h + h1)(a - a1) + (a1 x h))/2
• S2 = c x h2/2
• S3 = 2/3 c3 x h3
• S4 = c4 x h4/2
• S5 = 2/3 c5 x h5
• S6 = 2/3 c6 x h6
• S7 = 2/3 a x h7
• S8 = 2/3 b x h8
• CM* = (S1+S2+S3+S4+S5+S6+S7+S8)m²
• Area of Mastb = (Total Length x Perimeter / 2)m²
• CM = (CM* + Area of Mast + Area of Boom)m²

* intermediate calculation if other conditions apply
a h1 and h should be parallel
b only applies to rotating masts ## Length of Top of Mainsail Measurement    ## Jib Measurements

CJ - Area of Jib

• S9 = a + h14 x h / 2
• S10 = 2/3 b x h10
• S11 = 2/3 c x h11
• S12 = 2/3 a x h12
• S13 = h14 x d/2
• CJ = ( S9 +or- S10 +or- S11 +or- S12 - S13) m²

## Spinnaker Measurements

CSPI - Area of Spinnaker

• CSPI = SFx(SL1+SL2)/4+(SMG*-SF/2)x2/3(SL1+SL2)/2 m²

* where SMG >= 75% of SF 