1 Clew and tack Measurement Points ERS – G.4.1 Clew Point The intersection of the foot and the leach, each extended as necessary ERS – G.4.3 Tack Point The intersection of the foot and the luff, each extended as necessary

corner points clew point

3 corner points clew point

corner points tack point

5 5 steps to finding a corner measurement point using a 1m batten

6 Step 1 Tape some paper to the back of the sail in the area of the corner point

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8 Step 2 Hold the batten at its very ends with one end roughly where the corner point will be and the other end touching the edge of the sail, held firmly in place so it can’t move away from the edge

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10 Step 3 Move the batten at the corner point end curving it until the LONGEST length of the batten touches the sail edge

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21 Step 4 Mark the curve of the batten on the paper

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23 Step 5 Do the same with the other edge

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25 The cross marks the point

26 corner points tack point

27 Remember ERS – H.5.3 Attachments at a sail edge, other than a bolt rope and tabling, shall be ignored when measuring. This does not cover attachments at the corner of a sail (remember edges and corners are different) So, unless otherwise stated, corner attachments are included in measurement. Attachments

28 Head Measurement Point ERS - G.4.2 Mainsail : The intersection of the luff, extended as necessary, and the line through the highest point of the sail at 90° to the luff. (b) Headsail: The intersection of the luff, extended as necessary, and the line through the highest point of the sail, excluding attachments, at 90° to the luff. (c) Spinnaker: The intersection of the leeches, extended as necessary

29 Where is the head point? What are the limits on attachment size? (At a mainsail head, attachments are included). Head point Mainsail

30 head point Headsail – ignore the corner attachment

31 Headsail excluding attachments Headsail head point

Widths luff perpendicular

33 Session 6 Other Measurements This document is solely for the use of The International Sailing Federation. No part of it may be circulated, quoted, or reproduced for further distribution without prior written approval from the International Sailing Federation. This material was used by the International Sailing Federation during an oral presentation; it is not a complete record of the discussion break

34 Areas of Reinforcement

ERS – G.8.7 (a) At a Corner or an Edge (1)LENGTH At the Head: The dimension from the head point along the luff or its extension to a line through the highest point of the attachment at 90 o to the luff. At the Tack: The dimension from the tack point along the luff or its extension to a line through the lowest point of the attachment at 90 o to the luff. At the Clew: The greatest dimension from the clew point. At an Edge: The greatest dimension from the sail edge. (2)WIDTH The greatest dimension measured perpendicular to the length. (b)ELSEWHERE The greatest dimension of the attachment. Attachment Size

36 head point Attachment length Attachment width