Sail Area Measurement Instructions
Reference text
IYRU Measurement and Calculation of Sail Area Instruction – issue April 1985
Instruction
[…]
With battens set in their pockets the sail shall be pegged out on a flat surface with just sufficient tension to remove waves or wrinkles from the edge rounds and to spread the sail, as far as possible, substantially flat.
Once the sail has been pegged out in this way all the required measurements shall be taken and no alterations to the tensions shall be made.
[…]
For guidance, you may refer to International Measurement Manual 2017 article K.4
Sail corners
Tack point
Head point
Clew point
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