, except the table of National Sail Letters, is changed to:
G1 WORLD SAILING AND IRSA CLASS BOATS
This rule applies to every boat of a class administered or recognised by World Sailing or by the International Radio
Sailing Association (IRSA).
- A boat of a World Sailing or IRSA Class shall display her class insignia, national letters and sail number as specified in rule G1, unless her class rules state otherwise.
- At world and continental championships, sails shall comply with these rules. At other events they shall comply with these rules or the rules applicable at the time of their initial certification.
G1.2 National Letters
At all international events, a boat shall display national letters in accordance with the table of National Sail Letters denoting:
- when entered under rule 75.1(a), the national authority of the nationality, place of residence, or affiliation of the owner or the member.
- when entered under rule 75.1(b), the national authority of the organisation which entered her.
For the purposes of this rule, international events are world and continental championships and events described as international events in their notices of race and sailing instructions.
Note: An up-to-date version of the National Sail Letters table is available on the World Sailing website.
G1.3 Sail numbers
- The sail number shall be the last two digits of the boat's registration number or the competitor’s or owner’s personal number, allotted by the relevant issuing authority.
- When there is conflict between sail numbers, or when a sail number may be misread, the race committee shall require that the sail numbers of one or more boats be changed to numeric alternatives.
- National letters and sail numbers shall be in capital letters and Arabic numerals, clearly legible and of the same colour. Commercially available typefaces giving the same or better legibility than Helvetica are acceptable.
- The height and spacing of letters and numbers shall be as follows:
|Height of sail numbers
|Spacing of adjacent sail numbers
|Height of national letters
|Spacing of adjacent national letters
- Class insignia, sail numbers and national letters shall be positioned
However, symmetrical or reversed class insignia may be positioned back to back.
- on both sides of the sail;
- with those on the starboard side uppermost;
- approximately horizontally;
- with no less than 40 mm vertical spacing between numbers and letters on opposite sides of the sail;
- with no less than 20 mm vertical spacing between class insignia on opposite sides of the sail.
- On a mainsail, sail numbers shall be positioned
- below class insignia;
- above the line perpendicular to the luff through the quarter leech point;
- above national letters;
- with sufficient space in front of the sail number for a prefix ‘1’.
- Where the size of the sail prevents compliance with rule G1.2, National Letters, then exceptions to rules G1.2, G1.4, and G1.5 shall be made in the following order of precedence. National letters shall
- be spaced vertically below sail numbers by less an 30 mm, but no less than 20 mm;
- be spaced on opposite sides of the sail by less than 30 mm, but no less than 20 mm;
- be reduced in height to less than 45 mm, but no less than 40 mm;
- be omitted.
- Where the size of the sail prevents compliance with rule G1.3, Sail Numbers, then exceptions to rules G1.4 and G1.5 shall be made in the following order of precedence. Sail numbers shall
- extend below the specified line;
- be spaced on opposite sides of the sail by less than 30 mm, but no less than 20 mm apart;
- be reduced in height to less than 90 mm, but no less than 80 mm;
- be omitted on all except the largest sail;
- be reduced in height until they do fit on the largest sail.