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KONA CLASS RULES
INTRODUCTION
The Kona Class is devoted to the development of inexpensive one design racing, with an easy format
where the emphasis is on tactics rather than equipment.
The Kona hulls, hull appendages, and sails shall only be manufactured by Exocet/Flying Fish or their
appointed manufacturers. Such equipment is required to comply with the Kona One Design Building
Specification and is subj ect to an ISAF approved manufacturing control system.
After Kona hulls, hull appendages, rigs and sails have left the manufacturer, they may only be altered to
the extent permitted in Section C of these class rules.
Rules regulating the use of equipment during a race are contained in Section C of these class rules, in the
Equipment Rules of Sailing Part I and in the Racing Rules of Sailing.
This introduction only provides an informal background and the Kona Class Rules proper begin on the
next page.
INDEX
PART I - ADMINISTRATION
Section A - General
A.1 Language
A.2 Abbreviations
A.3 Authorities and Responsibilities
A.4 ISAF Rules
A.5 Class Rules Amendments
A.6 Class Rules Interpretations
A.7 Licensed Manufacturers
A.8 Sail Numbers
Section B - Equipment Eligibility
B.1 Hull Certification/ Markings
B.2 Event Inspection
B.3 Event Limi tation Marks
PART II - REQUIREMENTS AND LIMITATIONS
Section C - Conditions for Racing
C.1 General
C.2 Crew
C.3 Personal Equipment
C.4 Portable Equipment
C.5 Advertising
C.6 Hull
C.7 Hull Appendages
C.8 Rig
C.9 Sails
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C.10 Rig
C.11 Sails
Section D- Hull
D.1 Manufacturers
D.2 Identification
D.3 Materials, Construction & Dimensions
D.4 Fittings
Section E - Hull Appendages
E.1 Manufacturers
E.2 Identification
E.3 Materials, Construction & Dimensions
Section F - Rig
F.1 Mast
F.2 Boom
F.3 Mast Extension
Section G - Sails
G.1 Parts
G.2 Manufacturers
G.3 Identification
G.4 Materials, Construction & Dimensions
G.5 Fittings
PART III- APPENDICES
Section H - Measurement Instructions
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PART I - ADMINISTRATION
Section A - General
A.1 LANGUAGE
A.1.1 The official language of the class is English and in case of di spute over translation the English
text shall prevail.
A.1.2 The word "shall" is mandatory and the word "may" is permissive.
A.2 ABBREVIATIONS
A.2.1
ISAF International Sailing Federation
MNA ISAF Member National Authority
KWA Kona Windsurfing Association
NCA National Class Association
RRS Racing Rules of Sailing
ERS Equipment Rules of Sailing
A.3 AUTHORITIES AND RESPONSIBILITIES
A.3.1 The international authority of the class is the ISAF, which shall co-operate with the KWA in all
matters concerning these class rules.
A.3.2 No liability or legal responsibility in respect of these Rules can be accepted by the ISAF or
KWA, or its delegated representatives.
A.4 ISAF RULES
A.4.1 These class rules shall be read in conjunction with the ERS.
A.4.2 Except where used in headings, when a term is printed in "bold" the definition in the ERS
applies and when a term is printed in "italics" the definiti on in the RRS applies.
A.5 CLASS RULES AMENDMENTS
A.5.1 Amendments to these class rules are subject to the approval of the ISAF in accordance with
the ISAF Regulations.
A.6 CLASS RULE INTERPRETATIONS
A.6.1 Interpretation of class rules shall be made in accordance with the ISAF Regulations.
A.7 LICENSED MANUFACTURERS
A.7.1 Kona One Design equipment shall be manufactured by Exocet/Flying Fish, or by another
manufacturer appointed and licensed by Exocet/Flying Fish in consultation with the ISAF
referred to as licensed manufacturers in these class rules.
A.8 SAIL NUMBERS
A.8.1 Sail numbers shall be issued internationally by KWA.
Section B - Equipment Eligibility
For equipment to be eligible for racing, it shall comply with the rules in this section.
B.1 HULL CERTIFICATION & MARKINGS
B.1.1 Hull certificates are not issued.
B.1.2 Boards shall display the official ISAF logo wi th the text "ISAF".
B.2 EVENT INSPECTION
B.2.1 GENERAL
a) For the purpose of RRS 78, crews are considered to be the owners.
b) The role of Equipment Inspectors at an event is to verify that equipment has been produced
by a Licensed Manufacturer and has not been subsequently altered, using whatever
inspection methods they deem appropriate, including comparison with a standard or a
sample of other equipment presented for inspection. Should this comparison reveal deviation
greater than the Inspector considers bei ng within manufacturing tolerances, this shall be
reported to technical representatives of ISAF, KCA and Exocet/Flying Fish for investigation
and a decision on the legality of the equipment. If this investigation takes longer than the time
available for inspection, the owner shall present alternative equipment for inspection.
B.3 EVENT LIMITATION MARKS
B.3.1 All items of a crew's equipment which are subject to control , as per the schedule on the Regatta
Equipment Control Form, and which require event limitation marks shall be so marked.
B.3.2 Some items of equipment may receive two event limitation marks, one in a readily visible
position and a second in a position protected from wear and tear.
PART II - REQUIREMENTS AND LIMITATIONS
The crew and the equipment shall comply with the Rules in Part II when racing. In case of conflict Section C shall prevail.
The rules in Part II are closed class rules. Equipment inspection shall be carried out in accordance
with the ERS except where varied in this Part.
Section C - Conditions for Racing
C.1 GENERAL
C.1.1 RULES
(a) The following ERS shall not apply: A.2 Certificate; B.9 Setting, Sheeting and Changing
Sails.
C.2 CREW
C.2.1 LIMITATIONS
(a) The crew shall consist of one person.
C.2.2 MEMBERSHIP
(a) All Kona owners are granted membership of the Kona Windsurfing Community without payment of a fee.
C.2.3 WEIGHT GROUPS AND DIVISIONS
C.2.4 A WEIGHT GROUPS
LIGHT WEIGHT; 64.9 KILO AND BELOW
LIGHT MEDIUM & MEDIUM WEIGHT; 65 TO 85 KILO
HEAVY WEIGHT; 85.1 KILO AND UP
C.2.4 B Overlapping weight categories
Owners weighing in close to or within + - 2 kilo's to the next weight division may choose
which division to participate in.
The light medium and medium weight categories shall always be divided into two equal
groups according to a 50/50 split based on average weight at each individual event.
C.2.5 DIVISIONS
Women; The women’s divi sion includes all weight groups, in which sail si zes are optional,
but limited to the use of one size only within a specific event or series of accumulating races.
Cadets; The cadets division incl udes all youngsters below the age of 14. Sail sizes are
optional, but limited to the maximum size of 5.0 and the use of one size only within a specific
event or series of accumulati ng races.
C.2.6 Sail sizes and colour codes
The mandatory weight groups sail sizes shall be;
Light weight; 5.8 sqm. - blue top and trims
Light medium & medium weight; 7.4 sqm. - yellow top and trims
Heavy weight; 9.0 sqm. - red top and trims
C.2.7 Separation of divisions
It shall be up to the discretion of the race organizers to decide whether to start all or some
divisions simultaneously.
A minimum of 5 entries is required to constitute a class or a division within a
class.DIVISIONS
C.3 PERSONAL EQUIPMENT
C.3.1 Personal equipm ent does not have to be produced by a licensed manufacturer.
C.3.2 a) Optional
(i) Harness.
(ii) In alteration to RRS 1.2 buoyancy vest or jacket is opti onal (which may be described as
mandatory i n the Sailing Instructions). If personal buoyancy is prescribed, every
competitor shall wear a personal flotation device that shal l conform to the minimum
standard of ISO 12402-5 (Level 50). Alternative or additional standards may be prescribed
in the Notice of Race or Sailing Instructions.
A container for holding beverages in accordance with RRS Appendix B.2.1 (b)
(iii) An electronic or mechanical timing device.
(iv) A heart rate monitoring device.
b) Mandatory
i) Clothing and equipment, including harness but excluding beverage container, worn or
carried by the crew shall not weigh more than 6kg when weighed in accordance with
RRS Appendix H.
C.4 PORTABLE EQUIPMENT
C.4.1 Portable equipment does not have to be produced by a licensed manufacturer.
C.4.2 a) Optional
i) A towrope of minimum length 5m and a recommended thickness of 4 mm may be carried by
the crew. The use of the towrope may be specified as compulsory in an event’s Notice of
Race or Sailing Instructions.
C.5 ADVERTISING
C.5.1 LIMITATIONS
Advertising shall only be displayed in accordance with ISAF Regulation 20- Advertising Code.
C.6 HULL
C.6.1 LIMITATIONS
(a) Only one hull shall be used during an event, except when lost or damaged beyond
repair. A replacement may be made only with the approval of the Race Committee. The
Race Committee shall then attach an event limitation mark to the replacement hull and
remove or deface any event limitation mark attached to the replaced hull.
(b) Four foot straps shall be fitted to the existi ng i nserts using any stainless steel screw and
washer. Foot straps shall be fitted wi th at least one screw and washer at each end. The
foot straps may be changed or replaced during an event.
C.6.2 HULL WEIGHT
(a) The bare hull weight, incl uding the complete mast track and gasket assembly, shall not be
less than 15.0 kgs.
(b) Any corrector weights shall be securel y fixed in an accessi ble position that ensures
compli ance with C.6.2 (a)
(c) The hull may be weighed wet after a minimum of 10 minutes draining standing
vertically on its aft edge.
C.6.3 MAINTENANCE AND MODIFICATIONS
(a) The hull shall not be altered in any way except as permitted by these class rules.
(b) Repairs may be carried out provided such repairs are made in such a way that the
essential shape, characteristics or functi on of the original are not affected. The serial
number shall remain legible.
(c) The underside of the hull may be rubbed down and polished.
(d) The centreboard cassette may be shimmed.
(e) The deck grip may be restored to its original condition with a clear coating provided that the
original deck graphics can be clearly seen.
C.7 HULL APPENDAGES
C.7.1 LIMITATIONS
(a) Only one centreboard, as supplied by the manufacturer, shall be used during an event,
except when lost or damaged beyond repair. A replacement may be made only with the
approval of the Race Committee. The Race Committee shall then attach an event
limitation mark to the replacement hull appendage and remove or deface any event
limitation mark attached to the replaced hull appendage.
(b) The centreboard shall be carried i n the centreboard case at all times when racing.
C.7.2 MAINTENANCE AND MODIFICATIONS
(a) The hull appendages shall not be altered in any way except as permitted by these class
rules.
(b) Repairs may be carried out provided such repairs are made in such a way that the
essential shape, characteristics or function of the original are not affected.
(c) The sides of the fin root may be shimmed to fit the fin box.
(d) The centreboard/centreboard handle may be tuned to allow a perpendicular (90 degree)
position to the hull
C.8 RIG
C.8.1 LIMITATIONS
(a) Only one rig may be used during an event, except when an item has been lost or damaged
beyond repair. Such item may only be replaced with the same type of item and with the
approval of the Race Committee. The Race Committee shall then attach an event limitation
mark to the replacement item and remove and deface any event limitation mark attached to
the replaced item.
(b) The manufacturer of mast, boom, mast extension, and mast base, is optional.
C.8.2 MAINTENANCE AND MODIFICATIONS
(a) The rigs shall not be altered in any way except as permitted by these class rules.
(b) Repai rs may be carried out provided such repairs are made in such a way that the essential
shape, characteristics or functi on of the original are not affected.
(c) The mast spar may be lengthened using a mast extension.
(d) The mast spar extension may be shimmed with any sel f adhesive tape.
(e) The mast spigot may be shimmed.
(f) Any uphaul may be fitted.
(g) A safety line or device to secure the rig to the hull shall be fitted.
(j) The surface of the boom spar grip may be roughened using abrasive material.
(k) Cleats, pulleys and ropes may be replaced by any of the same characteristics and function.
(l) Any harness lines may be used.
C.9 SAILS
C.9.1 LIMITATIONS
(a) Only one sail may be used in an event, except when the sail has been lost or damaged
beyond repair. A replacement may be made only with a sail of the same size and wi th the
approval of the Race Committee. The Race Committee shall then attach an event limitation
mark to the replacement sail and remove or deface any event limitation mark attached to the
replaced sail.
(b) Sail sizes and colours. The fol lowing applies according to weight category:
Light weight – 5.8sqm with blue top and trims;
Light medium & medium weight - 7.4sqm with yellow top and trims;
Heavy weight – 9.0sqm with red top and trims.
(c) Only one set of battens per sail shall be used during an event. NCA's may allow other battens
to be used at non-International events within their jurisdiction.
C.9.2 SAIL IDENTIFICATION
(a) National Letters and Numbers
The national letters and (Intl) sail number shall be black in colour and applied on each side above batten
3 and as close to the leech as possible. Size shall comply with RRS Appendix G 1.2 for craft less than 3.5
m in length.
(b) Division Identification
As specified by sail colour coding
C.9.3 MAINTENANCE AND MODIFICATIONS
(a) Sails and fittings shall not be altered in any way except as permitted by these class rules.
(b) Repairs may be carried out provided such repairs are made in such a way that the essential
shape, characteristi cs or function of the original are not affected.
(c) Transparent self-adhesive mono-film patches may be attached to the sail adjacent to the boom spar
Section D - Hull
D.1 MANUFACTURERS
(a) The hull and fittings shall be produced by a licensed manufacturer.
(b) The hull shall be produced only by using moulds in the possession of Exocet/Flying Fish.
D.2 IDENTIFICATION
(a) The hull shall carry the uni que serial number issued by the licenced manufacturer in a
legible condition.
D.3 MATERAILS, CONSTRUCTION and DIMENSIONS
The hull shall comply with the Kona One Design buil ding specifications.
D.4 FITTINGS
(a) mast track complete
(b) centreboard cassette
(c) fin box
(d) gasket assembly
(e) gaskets
(f) towing eye
(g) foot strap fixing inserts
(h) foot straps
Section E - Hull Accessories
E.1 MANUFACTURERS
(a) Hull appendages shall be produced only by a licensed manufacturer.
E.2 IDENTIFICATION
(a) Fins and centreboards shall carry a unique ID number on the headstock.
E.3 MATERIALS, CONSTRUCTION AND DIMENSIONS
Shall comply with the Kona One Design building specification.
Section F - Rig
F.1 MAST
Masts shall be limited to a carbon content of maxi mum 75%.
F.2 BOOM
The boom shall be constructed of aluminium tubing with plastic end fittings.
F. 3 MAST EXTENSION
The mast extension shall be constructed of aluminium.
Section G - Sails
G.1 PARTS
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| a. Kona sail 3.5 m² |
b. Kona sail 4.2 m² |
c. Kona sail 5.0 m² |
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| d. Kona sail 5.8 m² |
e. Kona sail 7.4 m² |
f. Kona sail 9.0 m² |
(a)- 3.5 sq.m One Design Sail.
(b)- 4.2 sq.m One Design Sail.
(c)- 5.0 sq.m One Design Sail.
(d)- 5.8 sq.m. One Design sail.
(e)- 7.4.sq.m. One Design sail.
(f)- 9.0 sq.m. One Design sail.
G.2 MANUFACTURERS
Sails and fittings shall be manufactured by a licensed manufacturer.
G.3 IDENTIFICATION
Class insignia shall be applied by the manufacturer.
G.4 MATERIALS, CONSTRUCTION and DIMENSIONS
The sail shall comply with the class building Specifications.
G.5 FITTINGS
(a) Battens
Effective 30 November 2009
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