SCHRS MEASUREMENT

Basic Boat Measurements

* Including Rotating Masts and Boom, when applicable.

The SCHRS Boat Measurement

Beam Measurements

  • Beam - Width of the beam *

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

The SCHRS Beam Measurement

Boards Measurements

  • Standard daggerboard where VLB = board depth below hulls (a)

  • T Foil daggerboard where VLB = addition of both lengths (b + c)

  • Curved daggerboard where VLB = measured around external circumference (d)
The SCHRS Board Measurement

Main Sail Measurements

CM - Area of Main Sail + Mast + Boom

  • S1 = ((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 Mast0 = (Total Length x Perimeter / 2)m²
  • Area of Boom1 = (Total Length x Height)m²
  • CM = (CM* + Area of Mast + Area of Boom)m²

* intermediate calculation if other conditions apply
0 only applies to rotating masts
1 does not apply to boomless sails or if height is greater than 1.5 of breath

The SCHRS Main Sail Measurement

Length of Top of Mainsail Measurement

The SCHRS Top of Main Sail Measurement  The SCHRS Top of Main Sail Measurement  The SCHRS Top of Main Sail Measurement 

Jib Measurements

CJ - Area of Jib

  • S9 = a x h / 2
  • S10 = 2/3 b x h10
  • S11 = 2/3 c x h11
  • S12 = 2/3 a x h12
  • CJ = ( S9 +or- S10 +or- S11 +or- S12 ) m²
The SCHRS Jib Measurement

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

The SCHRS Spinnaker Measurement