Measurements

Basic Boat Measurements

• WS - Weight of the Boat (ready to sail)
• AL - Overall length
• WL - Waterline Length (before Jan 1st 2007)
• CM - The Main Sail Area ^*
• VLM - Vertical projection of Main Sail luff
• CJ - The Jib Area
• VLJ - Vertical projection of Jib luff
• CSPI - The Spinnaker Area
• CB - Board Area
• VLB - Board length

^* 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

• S1^a = ((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 Mast^b = (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

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