Instructions for Applying Sail Numbers
PLEASE NOTE THE FOLLOWING DIAGRAMS ARE FORINFORMATION AND ARE NOT PART OF THE CLASS RULES

Style and Colour
Only self-adhesive, stick on sail numbers and letters may be used. Each one shall be a single, solidcolour, and easy to read. The last four numbers on both sides of the sail shall be the same dark colour,
preferably black. The numbers in front of the last four shall all be another, obviously different colour,
preferably red. National letters are only required at international events, and shall all be the same colour.
Preparation
If the sail is not new, it should be sponged clean with mild soapy water, rinsed and dried. Find alarge, clean, flat, hard surface to work on, such as a table or clean wooden floor.
Template
Make a template that each number will just fit inside. See the Positioning Diagrams for theminimum sizes of numbers and letters, and template details. They are different for each of theILCA 7, ILCA 6 and ILCA 4 sails. The template is a rectangle for upright numbers, and aparallelogram for angled numbers.
Base Lines and Limit Lines
Use a pencil to lightly draw Base Lines and Limit Lines on the sail. The bottom of each number
and letter must lie on a Base Line. The Limit Line is parallel to the leech of the sail, and 100mm
from it. The closest letter or number to the leech is positioned to just touch the Limit Line. This isshown as the Start Point on the Positioning Diagrams. The number or letter should touch the Limit
Line at the Base Line or at any other height, depending on its shape.
Starboard Side Numbers and National Letters
1. Spread the sail out flat on the working surface so that the starboard side of the sail is facing up.
The leech (back edge of the sail) will be on the left hand side as shown in the positioning diagrams.
2. Make sure you are using the correct diagram for the design of sail you are applying thenumbers to. Draw the Base Line and Limit Line for the starboard numbers (and letters) asshown on the positioning diagram.
3. Before peeling off the backing, place the bottom of the first number on the Base Line, with theStart Point touching the Limit Line. Use the template with its bottom edge on the Base Line tomake sure the number is at the correct angle. Pencil around the outline of the number.
4. Peel and fold back about 10mm of the backing from the bottom of the number. Place thenumber within the pencil outline and press down to stick the peeled back area. Lift theremainder of the number and slowly peel off the backing as you smooth the number onto thesail, taking care to remove air bubbles and creases as you go.
5. If the first number you applied was a 1 (one), measure from the bottom right corner of it andmark a point the space width away along the Base Line. The space width is 60mm for ILCA 7and ILCA 6 sails, and 40mm for ILCA 4 sails - see the appropriate Positioning Diagram. Place
your template on the Base Line with its lower left corner on the new mark and pencil roundthe outline of it. Before peeling off the backing of the second number, place it within the pencil
outline of the template. Pencil around the outline of the number, and apply it as in point 4, above.
6. If the first number you applied was not a 1 (one), place your template over it and make a pencil
mark at the bottom right hand corner. Measure the space width from this mark along the BaseLine and make a second pencil mark. Place the template, with its lower left hand corner on thesecond mark, pencil around the outline and then apply the next number as in point 4, above.
7. When a 1 (one) is to be applied after another number, make sure the appropriate space width
between numbers along the Base Line is maintained, as shown in the positioning diagram.
Use the bottom right hand corner of the template, placed over the preceding number to find thestart of the space width on the Base Line.
8. Continue marking number positions using the template, the appropriate space widths between
template corners, and applying numbers to complete the full sail number. Use the same
method to apply national letters if they are required.
Port Side Numbers and National Letters
1. Spread the sail out flat on the working surface so that the port side of the sail is facing up. Theleech (back edge of the sail) will be on the right hand side. Draw the Base Line for the port
numbers (and letters).
2. Start with the letter or number closest to the leech making sure that no part of the number or
letter crosses the 100mm Limit Line towards the leech. Follow the same method as for thestarboard side of the sail, working along the Base Line away from the leech towards the luff.

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