See rule 77.
H1 ISAF International Class Boats
Every boat of an ISAF International Class or Recognized Class shall carry on her mainsail and, as provided in rules H1.3(d) and (e) for letters and numbers only, on her spinnaker and headsail
(a) the insignia denoting her class;
(b) at all international events, except when the boats are provided to all competitors, national letters denoting her national authority from the table below. For the purposes of this rule, international events are ISAF events, world and continental championships, and events described as international events in their notices of race and sailing instructions; and
(c) a sail number of no more than four digits allotted by her national authority or, when so required by the class rules, by the international class association. Alternatively, if permitted in the class rules, an owner may be allotted a personal sail number by the relevant issuing authority, which may be used on all his boats in that class.
Sails measured before 31 March 1999 shall comply with rule H1.1 or with the rules applicable at the time of measurement.
|IVB||British Virgin Islands||LAT||Latvia|
|CZE||Czech Republic||AHO||Netherlands Antilles|
|ECU||Ecuador||PNG||Papua New Guinea|
|CAY||Grand Cayman||SMR||San Marino|
|RSA||South Africa, Republic of||TUR||Turkey|
|SRI||Sri Lanka||UAE||United Arab Emirates|
|LCA||St. Lucia||GBR||United Kingdom|
|SUD||Sudan||USA||United States of America|
|SUI||Switzerland||ISV||US Virgin Islands|
|TRI||Trinidad & Tobago||YUG||Yugoslavia|
(a) 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.
(b) The sizes of characters and minimum space between adjoining characters on the same and opposite sides of the sail shall be related to the boat's overall length as follows:
| Minimum space
and numerals or
edge of sail
|Under 3.5 m||230 mm||45 mm|
|3.5 m-8.5 m||300 mm||60 mm|
|8.5 m-11 m||375 mm||75 mm|
|Over 11 m||450 mm||90 mm|
Class insignia, national letters and sail numbers shall be positioned as follows:
(a) Except as provided in (d) and (e) below, class insignia, national letters and sail numbers shall when possible be wholly above an arc whose centre is the head point and whose radius is 60% of the leech length. They shall be placed at different heights on the two sides of the sail, those on the starboard side being uppermost.
(b) The class insignia shall be placed above the national letters. If the class insignia is of such a design that two of them coincide when placed back to back on both sides of the sail, they may be so placed.
(c) National letters shall be placed above the sail number.
(d) The national letters and sail number shall be displayed on the front side of a spinnaker but may be placed on both sides. They shall be displayed wholly below an arc whose centre is the head point and whose radius is 40% of the foot median and, when possible, wholly above an arc whose radius is 60% of the foot median.
(e) The national letters and sail number shall be displayed on both sides of a headsail whose clew can extend behind the mast 30% or more of the mainsail foot length. They shall be displayed wholly below an arc whose centre is the head point and whose radius is half the luff length and, if possible, wholly above an arc whose radius is 75% of the luff length.
H2 Other Boats
Other boats shall comply with the rules of their national authority or class association in regard to the allotment, carrying and size of insignia, letters and numbers. Such rules shall, when practicable, conform to the above requirements.
H3 Chartered or Loaned Boats
When so stated in the notice of race or sailing instructions, a boat chartered or loaned for an event may carry national letters or a sail number in contravention of her class rules.
H4 Warnings and Penalties
When a protest committee finds that a boat has broken a rule of this appendix it shall either warn her and give her time to comply or penalize her.
H5 Changes by Class Rules
ISAF classes may change the rules of this appendix provided the changes have first been approved by the ISAF.
See rule 43.1(b). This appendix shall not be changed by sailing instructions or prescriptions of national authorities.
The items of a competitor's clothing and equipment to be weighed shall be arranged on a rack and thoroughly soaked by total immersion in water for one minute or longer if necessary for total saturation. After being soaked, the items shall be allowed to drain freely for one minute before they are weighed. Life-jackets shall be included, but not a hiking or trapeze harness or clothing worn only below the knee unless class rules require that it be included. The rack must allow the items to hang as they would hang from clothes hangers, so as to allow the water to drain freely. Hiking or trapeze harnesses shall be weighed separately and tested for positive buoyancy.
During the weighing, pockets that have drainholes that cannot be closed shall be empty, but pockets or items of equipment that hold water shall be full.
When a weight recorded exceeds the amount permitted, the competitor may twice rearrange the clothing and equipment on the rack and the measurer shall again soak and weigh it. If a lower weight is recorded that record shall be final.
A competitor wearing a dry-suit may choose an alternative means of weighing:
(a) the dry-suit and items of clothing and equipment that are worn outside the dry-suit shall be weighed as described above;
(b) clothing worn underneath the dry-suit shall be weighed as worn while racing, without draining; and
(c) the two weights shall be added together.