i

International Optimist Class Rules

International Optimist Dinghy Associationwww.optiworld.org20192021

ii

iii

CONTENTS

1. GENERAL 1

2. ADMINISTRATION 12.1 English Language 12.2 Builders 12.3 World Sailing Class Fee 22.4 RegistrationandMeasurementCertificate 22.5 Measurement 42.6 MeasurementInstructions 42.7 IdentificationMarks 52.8 Advertising 63. CONSTRUCTION AND MEASUREMENT RULES 6

3.1 General 63.2 Hull 7

3.2.1 Materials - GRP 7

3.2.2 Hull Measurement Rules (see also CR 3.1) 7

3.2.3 GRPHullConstructionDetails 11

3.2.4 ConstructionDetails-Wood&WoodEpoxy:SeeAppendixA 14

3.2.5 Rule number not used. 14

3.2.6 Fittings 14

3.2.7 Bouyancy 16

3.2.8 Weight 17

3.3 Daggerboard 173.4 Rudder and Tiller 203.5 Spars 22

3.5.1 Materials 22

3.5.2 Mast 23

3.5.3 Boom 24

3.5.4 Sprit 25

3.5.5 Running Rigging 26

iv

4. ADDITIONAL RULES 26

5. SPARE RULE NUMBER 27

6. SAIL 27

6.1 General 27

6.2 Sailmaker 28

6.3 Mainsail 28

6.4 Dimensions 30

6.5 ClassInsignia,NationalLettersandSailNumbers,LuffMeasurementBand 31

6.6 Additional Rules 31

APPENDIX A 33

PLANS 36

ADDENDUM 37

1

1. GENERAL

1.1 Theobjectoftheclassistoprovideracingforyoungpeopleatlowcost.

1.2 TheOptimistisaOne-DesignClassDinghy.Exceptwheretheserulesspecificallypermitvariations,boatsofthisclassshallbealikeinhullform,construction,weightandweightdistribution,riggingsparsandsailplan.

Note:Indecidingwhetheranitemispermitteditshouldbenotedthat,inaOne-DesignClass,unlesstherulesspecificallystatethatsomethingispermitteditshallbeassumedtobeprohibited.

1.3 Theserulesarecomplementarytotheplans,measurementformsandmeasurementdiagrams.AnyrequestforinterpretationandresolutionthereofshallbemadeinaccordancewithcurrentWorldSailingregulations.

1.4 Intheeventofdiscrepancybetweentheserules,themeasurementformand/ortheplansthemattershallbereferredtoWorldSailing.

2. ADMINISTRATION

2.1 English Language

2.1.1 TheofficiallanguageoftheclassisEnglish,andintheeventofadisputeoverinterpretationtheEnglishtextshallprevail.

2.1.2 Theword“shall”ismandatoryandtheword“may”ispermissive.

2.1.3 Whereverintheserulesthewords“ClassRules”areusedtheyshallbetakenasincludingtheplans,diagramsandthemeasurementforms.

2.1.4 The“NationalClassAssociation”istheInternationalOptimistClassAssociationinthecountryconcerned.

2.2 Builders

2.2.1 TheOptimistmaybebuiltbyanyprofessionaloramateurbuilder.

2.2.2 ProfessionalbuildersshallberesponsibleforsupplyingboatscomplyingwiththeClass

Rules.Thebuildershallathisownexpensecorrectorreplaceanyboatwhichfailstopassmeasurement,duetoanomissionorerrorbythebuilder,providedthattheboatissubmittedformeasurementwithintwelvemonthsofpurchase.

2.2.3 Manufacturersofkitsorpartsshallberesponsibleforsupplyingparts,which,whenassembledinaccordancewiththemanufacturer’sinstructions(ifany),willproduceboatscomplyingwiththeClassRules.Themanufacturerofthekitorpartswhichisshownnottodothisshall,athisownexpense,replacethepartsofthekitwhichareincorrectprovidedthattheerrorismadeknowntothemanufacturernotmorethantwelvemonthsfromthedateofpurchase.

2

2.2.4 Abuildershallissuewitheachhullawrittenbuilder’sdeclaration,statingthatthehullcomplieswiththerelevantClassRules.

2.3 World Sailing Class Fee

2.3.1 TheamountoftheWorldSailingClassFeeisdeterminedbyWorldSailinginconsultationwithIODA.TheExecutiveCommitteemayalterthisamountfollowingsuchconsultation.

2.3.2 TheWorldSailingClassFeeshallbepaidbythebuilderoneachhullassoonasbuildingormouldingcommences.Forwoodandwood/epoxyhullstheplaqueshallbesuppliedatthetimeofmeasurement.

2.3.3 ThebuildershallbuythebuildingplaqueandRegistrationBook:

(a)forGRPhulls,fromIODA

(b)forwoodandwood/epoxyhulls,fromIODAortheNationalOptimistAssociation

2.3.4 (a)IODAisresponsibleforcollectingtheWorldSailingClassFeeonbehalfofWorldSailing.

(b)IODAwillbuybuildingplaquesfromWorldSailingunlessotherwiseagreedwithWorldSailing.

(c)IODAortheNationalAssociationshallselltheplaquestothebuilder.

Eachplaqueshall,ateverystage,besoldwiththeofficialWorldSailingClassFeereceiptandthebuildersdeclarationform.TheWorldSailingClassFeereceiptshallbesenttotheappropriateNationalAuthoritywhentheboat’ssailnumberisappliedfor.

2.3.5 ForeachWorldSailingClassFeepaid,IODAortheNationalOptimistAssociationshallissueabuilder’sdeclaration,WorldSailingClassFeereceiptandaWorldSailingPlaque,whichthebuildershalldeliverwiththehulltotheowner.Builder’sdeclarationsandWorldSailingClassFeereceiptsareonlyvalidiftheyaremadeoutontheofficialformsissuedbyIODA.Thebuildingfeereceiptandbuilder’sdeclarationisincorporatedintheRegistrationBook.

2.4 Registration and Measurement Certificate

2.4.1 Noboatispermittedtoraceintheclassunlessithasavalidmeasurementcertificate.ThisrulemaybesuspendedinthecaseofcharterboatsatanyeventwiththepermissionoftheIODAExecutiveCommittee.

2.4.2 EachNationalAuthorityshallissuesailnumberswhichshallbeconsecutiveandthenumbershallbeprecededbythenationalletters.Numberingmayrestartat1onreachingnumber9999.ANationalAuthorityshallissueasailnumberonlyonreceiptofevidencethatthebuildingfeehasbeenpaid.

3

2.4.3 Thecertificateisobtainedasfollows:

(a) ThebuildershallhavethehullmeasuredbyameasurerofficiallyrecognisedbyhisNationalAuthority.TheRegistrationBookwiththeWorldSailingClassFeereceipt,builder’sdeclarationandhullmeasurementformsectioncompletedshallbesuppliedtotheowneroftheboat.

(b) TheownershallapplytotheappropriateNationalAuthorityforasailnumberenclosingtheirRegistrationBookwithbuilder’sdeclarationandbuildingfeereceipt.TheNationalAuthorityshallenterthesailnumberintheRegistrationBook.

(c) TheownerisresponsibleforsendingtheRegistrationBookwiththebuilder’sdeclarationandallmeasurementformsectionscompletedtohisNationalAuthority,togetherwithanyregistrationfeethatmayberequired.Onreceiptofthis,theNationalAuthorityshallcompletethemeasurementcertificatesectionoftheRegistrationBookandreturnittotheowner.NotethatwhereaNationalAuthoritypreferstoissueitsowncertificatethisshallbefirmlyfixedto,andmentionedintheRegistrationBook.

2.4.4 Changeofownershipinvalidatesthemeasurementcertificatebutshallnotnecessitateremeasurement.ThenewownershallapplytohisNationalAuthorityforendorsementofthecertificate/RegistrationBookreturningitwithanyre-registrationfeerequiredandstatingthenecessaryparticulars.Themeasurementcertificate/RegistrationBookshallthenbereturnedtotheowner.

2.4.5 IfareplacementRegistrationbookisrequired,itmaybeobtainedfromIODA.ThenewRegistrationbookshallbeprintedwiththesameplaquenumberastheoldRegistrationbook.InthecaseofhullsproducedbeforeRegistrationBookswereintroduced,wheretheMeasurementCertificatehasbeenlostaNationalAuthoritymay,afterconsultationwithIODA,issueareplacementMeasurementCertificate,validforalleventsotherthanIODAchampionships,withoutevidenceofmeasurementprovidedthattheWorldSailing/ISAF/IYRU/plaqueremainsaffixedtothehull.(Notethatsuchplaqueshavenumberslowerthan92000).

2.4.6 Notwithstandinganythingcontainedintheserules,WorldSailingortheNationalAuthorityshallhavethepowertorefusetograntacertificate,orwithdrawameasurementcertificatefromanyboat,givingwrittenreasonsfortakingsuchaction.

2.4.7 IncountrieswherethereisnoNationalAuthorityorinwhichtheNationalAuthoritydoesnotwishtoadministertheclass,itsfunctionsasstatedintheserulesshallbecarriedoutbyIODAoritsdelegatedrepresentatives(i.e.NationalClassAssociations).

4

2.5 Measurement

2.5.1 OnlyameasurerofficiallyrecognisedbyaNationalAuthorityshallmeasureahull,spars,sailsandequipment,andsignthedeclarationonthemeasurementformthattheycomplywiththeClassRules.Hullsshallbemeasuredinaccordancewiththeappropriatehullmeasurementinstructions.Forwoodandwood/epoxyhullsseeAppendixA.

2.5.2 Themeasurershallreportonthemeasurementformanythingwhichheconsiderstobeadeparturefromtheintendednatureordesignoftheboatortobeagainstthegeneralinterestoftheclass.Ameasurementcertificatemayberefused,evenifthespecificrequirementsoftherulesaresatisfied.

2.5.3 Ameasurershallnotmeasureahull,spars,sails,orequipmentownedorbuiltbyhimself,orinwhichheisaninterestedpartyorhasavestedinterest.

2.5.4 Forwoodandwood/epoxyhulls,seeAppendixA

AllGRPhullsshallcomplywiththecurrentrulesortherulescurrentatthetimetheboatwasfirstmeasuredandregisteredwiththeNationalAuthorityasthebonafidepropertyofacurrentOptimistsailororhisfamily,orasailingclub/schoolrecognisedbythenationalauthorityornationalOptimistassociation.

GRPhullsfirstsomeasuredandregisteredbetween1March1995and1March1996shallconformeithertotheclassrulesinforcefrom1March1994ortotheclassrulesinforcefrom1March1995.Hullsfirstsomeasuredandregisteredafter1March1996shallconformtotheclassrulesthencurrent.

Fittings,spars,sailsandotherequipmentshallcomplywiththecurrentrules,unlessotherwisestatedinthespecificclassrulereferringtosuchequipment.

2.5.5 Itistheowner’sresponsibilitytoensurethathishull,spars,sailsandequipmentaremaintainedinaccordancewiththeClassRulessothatthemeasurementcertificateisnotinvalidated.Alterationsorreplacementstothehull,sails,sparsandequipmentshallcomplywiththecurrentrules.

2.5.6 Neworalteredsailsshallbemeasuredbyameasurerwhoshallstamporsignanddatethesailsnearthetack.ThedetailsshallberecordedonthecertificateandtheentrysignedbythemeasurerorthesecretaryoftheNationalAuthority.

2.6 Measurement Instructions

ExceptwherevariesbytheserulestheWorldSailingMeasurementInstructionsshallapply.

5

2.7 Identification Marks

2.7.1 TheClassEmblemshallbetheletterIandOandshallconforminshapeandsizetothepatternheldbyWorldSailing.CopiesmaybeobtainedfromtheNationalClassAssociations,IODAorNationalAuthority.

2.7.2 Thebuildingfeeplaqueshallbelegible,clearlyshownandpermanentlygluedonthestarboardsideoftheaftfaceofthemastthwartbulkhead.

2.7.3 Allhulls,mayhavethesailnumberandNationalLettersclearlyidentifiedonthestarboardsideoftheaftfaceofthemastthwartbulkheadinfiguresnotless than 10 mm high.

2.7.3.1 GRPhullsmayhaveanidentificationnumber,infiguresnotlessthan10mmhigh,mouldedineachhullcomponent:

Component1:Hullshell:theforwardfaceoftheforwardtransom(within60mmofthecentreofthistransom).

Component2:Gunwale-MastThwartassembly:thestarboardbottomflangeofthemastthwartbulkhead.

Component3:DaggerboardCase-MidshipFrameassembly:theforwardbottomflangeofthedaggerboardcase.

Thisidentificationnumbershallconsistof:codenumberofbuilderandcodenumberofmould,bothallocatedbyIODAtoeachmouldandbuilderfollowingapprovalofeachprototype.

ThisnumbermaybeinvalidatedifitisestablishedthathullshavedeviatedfromClassRulesafterprototypemeasurement.

Exampleofapossiblehullidentificationno.:(thisexampleno.isnotvalid)

6

2.7.3.2 OnGRPhullsthebuildershallengraveontheforwardtransom,15mmbelowtheidentificationnumberaregistrationmark,infiguresnotlessthan6mmhigh.Thisregistrationmarkshallconsistof:

2.7.3.3 Manufacturersshallallotaserialnumbertothemast,boom,sprit,daggerboardandrudder.TheseserialnumbersshallbereportedontheappropriateMeasurementFormbythemeasurerandshallbeclearlyandindeliblymarkedbythebuilderontherudder,daggerboardandspars.

2.7.4 ThesailnumberandNationalLettersshallbeclearlymarkedontherudder,daggerboardandspars.

2.7.5 Thesailshallcarryidentificationmarksindicatedinrule6.5andeachsailmanufacturedormeasuredafterJanuary1st1990shallhavepermanentlyfixednearitstackanofficiallynumberedsailbuttonorsaillabel.Nosailshallbeacceptedforfirstmeasurementwithoutasailbuttonorsaillabel.Buttonsorlabelsshallnotbetransferredfromonesailtoanother.Saillabelsshallbepermanentlygluedtothesailwithtwolinesofstitchingacrossthelabel.Alternatively,labelsshallbepermanentlygluedtothesailandfurthersecuredwiththeICAsuppliedrivet.Buttons/LabelsshallnormallybeobtainedfromtheInternationalOptimistDinghyAssociation(IODA)bythesailmakersbutmayalsobeobtained,ifnecessary,byNationalClassAssociations.

2.7.6 Allemblems,plaques,marksandnumbersshallbeclearlylegible,ofdurablematerialandshallbesecurelyattached.

2.8 Advertising

2.8.1 Competitoradvertisingisonlypermittedasfollows:thehullinanyareanotalreadydesignatedforEventAdvertising.Suchadvertisingmayonlybeappliedasatemporaryadhesivesticker.

2.8.2 InadditiontoWorldSailingRegulation20.2.4,promotionoftobaccooralcoholproductsoradvertisingofanovertlysexualnature,isnotpermitted.

3. CONSTRUCTION AND MEASUREMENT RULES

3.1 General

3.1.1 AllboatsshallbebuiltaccordingtotheClassRules(seealsoCR2.1.3).Thedimensionsandshapeofthehullshallbeasshownontheplansandasgivenintheserules,diagramsandmeasurementformsandshallconformwiththetolerancesstatedtherein.MaterialsshallbeasspecifiedintheseClassRulesexceptthattitanium,carbonfibreorotherexoticmaterialsareprohibited.

7

3.1.2 Anyattempttoconcentratetheweightofthehullisprohibited.

3.2 Hull

3.2.1 Materials - GRP.

ForCR3.2.1forwoodandwood/epoxyhulls,seeAppendixA.

3.2.1.1 ThehullshallbeconstructedofmaterialsapprovedbyWorldSailingThefollowingarethecurrentlyapprovedmaterials:GlassReinforcedPlastic(GRP).

3.2.1.2 Hullsshallbeconstructedfrom:

Mats&wovenclotharespecifiedingramspersquaremetre+/-10%(gr./m2)

TheEglassfibresandPolyesterresinshallbetransparent.Colouredfibresandresinsareprohibited.

Foamcoreisspecifiedinthicknessandweightpercubicmetre+/-10%(mm;kg/m3)

Nomaterialotherthanthoseprescribedaboveshallbeusedtobuildhulls.IncaseofdoubttheIODAandWorldSailingmayprescribeanytestsandinvestigationsatbuilder’sexpense.(seealsoCR3.2.3.2)

3.2.2 Hull Measurement Rules (see also CR 3.1)

ForGRPhulls,WorldSailingorIODAwillrequiresamplesofthehulllaminatestocheckcompliancewiththeClassRules.Abuildershallpermitanapprovedmeasurerorclassrepresentativetoinspectworkatanytimeduringproductionofhulls.

3.2.2.1 GRPHulls.Forwoodandwood/epoxyhulls,seeAppendixA.

UnlessotherwiseprescribedintheseClassRules,plansandmeasurementforms,tolerancesshallbe+/-2mm.Measurementsprescribedasmax.(=notmorethan)ormin.(=notlessthan)shallhavenofurthertolerances.Sometoleranceexamples(allmeasurementsinmm):

XYZco-ordinate:1037/008/35.3i.e.allstandardtolerances+/-2.(1035-1039/006-010/33.3-37.3)

Dimension:40.i.e.standardtolerance+/-2.(38-42)

8

XYZco-ordinate:2158+/-4/000/172i.e.Xco-ordinate2158+/-4(2154-2162),Yco-ordinate000andZco-ordinate172havestandardtolerance+/-2.

XYZco-ordinate(1037/008/35.3)+/-4i.e.allco-ordinates+/-4

Dimension:40+/-3i.e.37-43.

Dimension:40+4/-0i.e.40-44.

Thetolerancesonhullmeasurementsareintendedtoallowforgenuinebuildingerrorsandforsubsequentdistortiononlyandshallnotbeusedtodeliberatelyalterthedesignshape.

3.2.2.2 GRPHullPrototypeMeasurement:ItisobligatoryforallbuildersofGRPhullstoensurethatanyprototypehullmeasurescorrectlybeforeseriesproductioncommences.Non-professionalbuildersshallensurethatthefirsthullbuiltinanymouldshallbemeasuredasaprototype.OnlymeasurersapprovedbyWorldSailingandtheIODAshallmeasureprototypes.(seealsoCR2.7.3.1)

3.2.2.3 TheBase-lineshallbeahorizontallinepassingthroughpointswhichare110mmand162mmbelowtheoutersurfaceofthehullonitscentrelineat28mmand2121mmrespectivelyfromaverticalplanethroughthelowercorneroftheafttransom.Theupperbase-lineshallbeahorizontalcentrelinepassingthroughpointswhichare63mmabovethehighestpointoftheafttransomand23mmabovethehighestpointoftheforwardtransom.

3.2.2.4 Theafttransomshallbeatrightanglestothebaselinebutamaximumdeviationof5mm,measuredattheupperedgeofthetransomispermitted.

3.2.2.5 GRPHulls.Forwoodandwood/epoxyhullsseeAppendixA.

Theoveralllengthexcludingrudderfittingsshallbe2300mm+/-7mm,measuredatpoint4.Forlengthandbeammeasurementspoints4(sheerline)shallbedefinedbyusingthe‘StandardizedSheerlineFinder’.

3.2.2.6 Astraightedgelongenoughtospanthebottompanelfromchinetochineplacedatanypointonthepanelatrightanglestotheforeandaftcentrelineshallnowherebemorethan5mmfromthesurfaceofthepanel.Nohollowsareallowed.

9

3.2.2.7 Astraightedgeplacedanywhereincontactwiththesidepanelandspanningthepanelandsoangledthatitliesascloseaspossibletothepanelshallnowherebemorethan5mmfromthesurfaceofthepanel.

3.2.2.8 Astraightedge300mmlongplacedanywhereonthebottompanelparalleltotheforeandaftcentrelineoftheboatshallnowherebemorethan4mmfromthesurfaceofthebottompanel.Nohollowsareallowed.Astraightedge150mmlong,placedinthesameway,shallnowherebemorethan2mmfromthebottompanel.

OnGRPhullsonly,forthepurposeofthisandother‘panelflatnessmeasurements’theextentofthepanelswillbelimitedbyanedgezone,definedbythe‘StandardizedEdge-Edge-ZoneFinder’.

10

3.2.2.9 GRPHulls.Forwoodandwood/epoxyhulls,seeAppendixA.

Theforwardandafttransoms,mastthwartbulkhead,midshipframeaftfaceanddaggerboardcase(vertical)sidesshallbeflatwithnotmorethan5mmtolerance.Thetopsidesofthemastthwart,daggerboardcaseandmidshipframeshallbeflat+2-0mm(i.enohollowsallowed).

3.2.2.10 GRPHulls.Forwoodandwood/epoxyhulls,seeAppendixA.

Theinsidelengthofthedaggerboardslotandoftheslotinthebottompanelshallbe330mm+/-4mm.Theverticalendsinthedaggerboardslotshallbesquaretothebaseline.Ateachendaraketotapernotexceeding4mmispermitted.Thedaggerboardcasetopside,measuredatthetopedgesoftheendsofthedaggerboardslot,shallbeparalleltotheupperbaseline,withinatoleranceof5mmmaximum.

3.2.2.11 GRPHulls.Forwoodandwood/epoxyhulls,seeAppendixA.

Theinsidewidthofthedaggerboardcaseslotshallbe17mm+/-1mm.Theforeandaftendsoftheslotshallbesemi-circularincrosssection.(Seealso CR 3.2.6.1)

3.2.2.12 GRPHulls.Forwoodandwood/epoxyhulls,seeAppendixA.

Theoutsideedgesofthehullbetweenthebottomandsidepanels,betweenthebottomandforwardtransom,andbetweenthesidepanelsandforwardtransomshallberoundedtoaradiusof10mm+0/-1mm.Attheafttransomsideandbottomoutsideedgesnoradiusispermitted.

3.2.2.13 Themastholeinthethwartshallbeapproximatelycircular.Thediameterisoptionalbutshallnotvarybymorethan3mminanydirection.Asleeveofanymaterialmaybefittedintheholetolimitabrasion.Thesleeveshallnotextendmorethan3mmabovethemastthwart.Thetotalheightofthesleeveshallnotexceed30mmanditsholeshallcomplywiththerequirementsofthisrule.

3.2.2.14 ExceptasspecifiedintheseClassRulesorplans,holesorcutoutsinthegunwale,daggerboardcase,midshipframe,mastthwartandbulkheadareprohibited.(seealsoCR1.2)

11

3.2.2.15 GRP Hulls.

Toavoidsharpprojectionsandinjuries,theexposededgesof:thegunwaleandrubbingstrake,midshipframetopflange,daggerboardcaseopening,mastthwartandmastthwartbulkheadopening;shallberoundedtothemaximumpossibleradius.

3.2.2.16 GRPHulls.Forwoodandwood/epoxyhulls,seeplans

TheGunwale-Rubbingstrakesectionisdefinedperpendicular*tothesheerline.Itspositioningangleisfixedandrelatedtothebaselinereferencesurfaceonly.TheGunwalesectionshallbeconstantthroughoutitsentirelength,includingtheForwardandAfttransom,exceptwithin180mmoftheintersectionbetweenTransomandSidesheerlines.TheRubbingstrakesectionshallbeconstantthroughoutitsentirelength,includingtheForwardandAfttransom,exceptwithin10mmoftheintersectionbetweenTransomandSidesheerlines.(*Ifsheerlineiscurved,perpendicular=alongtheradiusofthesheerlinecurve)

3.2.3 GRPHullConstructionDetails

See also CR 3.2.2Forwoodandwood/epoxyhullconstructiondetails,seeAppendixA

3.2.3.1 GRP Moulds.

HullsshallbeconstructedofonlythreemouldedcomponentsasdescribedinCR2.7.3.1.Eachofthesethreecomponentsshallbeconstructedusingonlyonemould.BuildersshallapplyforamouldidentificationnumberallocatedbytheIODAforeachmould.(seealsoCR2.7.3.1&2.7.3.2)

3.2.3.2 Laminatespecifications.(seealsoCR3.2.1.2)

• LaminatespecificationandlayupordershallbeasdefinedintheseClassRules,detailsandplans.

• Distributionofglasscontentandweightofeachlaminateshallbeuniformthroughoutwithin+/-5%.

• Thicknessoflaminateshallbeuniformthroughoutwithin+/-5%or1mmwhicheverisgreater.

• Thicknessanddensityoffoamcoreinthebottomandthemastthwartlaminateshallbeuniformthroughoutwithin+/-3%.

12

• Forthepurposeofbuildingefficiency,overlappingof1mat,wovenclothorbiaxialispermittedwithin50mmfromanycorner.Overlapping,ifany,shallbeappliedoverthefulllengthalongeachcorner.

• Anylaminateshallonlyhaveonemouldside,whichshallbesmooth.

• Mouldedpatternsarenotpermittedexceptforanoptionalanti-slippatternnotexceeding1mmthicknessatthegunwaleaftofthemidshipframe.

• Theupper300matofthebottomlaminateshalloverlapthe300matusedinthemaststepbasetoensureastrongbondbetweenhullandmaststep.

•

13

Forthepurposeofpositioningandfixing,thetopofthedaggerboardcase,theflangesofthemidshipframe-daggerboardcaseassemblyandtheflangesofthemastthwartbulkheadshallconsistofmin3x450/max5x450mat(min3mm/max8mmthickness).Atthistopandtheseflanges,thedistributionofglasscontentandthethicknessofthelaminateneednotbeuniformthroughout.

14

3.2.4 ConstructionDetails-Wood&WoodEpoxy:SeeAppendixA

3.2.5 Rule number not used.

3.2.6 Fittings

3.2.6.1 Thefollowingfittingsarepermitted:

(a) 2Mainsheetblocks(excludingthoseontheboom;eachwithamaximumof2sheaves)shallbeattachedtothehullinnerbottom.Thecentreoftheirfixingpointsshallbeat786mm+/-5mmand894mm+/-5mmfromtheforwardfaceoftheafttransom

(b) Oneratchetblockforthemainsheet.

(c) 2toestrapsand4associatedfixingplatesof50mm+/-10mmx20mm+/-5mmx2mm+/-1mmifmetalor50mm+/-10mmx20mm+/-5mmx7mm+/-3mmifplastic.(seealsoCR3.2.6.2andCR3.2.7.3)Uptothreepiecesofcordorelasticcordmaybeusedtoliftthetoe-strapsoffthehullshellfloor.

(d) Acompassandassociatedfittings,whichshallallberemovableforweighingthehull.Acompassmayincludeatimingdevice.Anelectronictimingdeviceispermitted.NoelectronicdevicesotherthanthoserequiredorpermittedbyanOrganizingAuthorityand/orIODAintheNoticeofRaceand/orSailingInstructions,shallbepermittedonboardwhenracing.

(e) Retainingclip(s)forapaddle.

(f) Anadjustablemaststep.Movementofthemastatthemaststeporatthepassageofthemastthroughthemastthwartshallnotbeabletoexceed3mminanyhorizontaldirection.Themastormaststepshallnotbeadjustedwhileracing.Maststepdeviceswhichcanbeeasilysetwhileracinginsuchawaythatthisruleisinfringed,areprohibited.

(g) Retainingclipsforwaterbottles,foodcontainerorotherpersonalequipment,whichshallberemovableforweighinghtehull.

(h) Retainingclipforfasteningthetillerextensiontothetiller.

(i) Stripsofnon-metallicmaterialmaybefittedtothedaggerboardcaseslotwithin30mmofthetopandbottomofthedaggerboardcaseslottoachieveauniformopeningof16mm+/-2mmatthetopandbottomofthedaggerboardcaseslot.Additionalnon-metallicmaterialmaybeplacedwithin30mminanydirectionofeachendofthetopandbottomofthedaggerboardcaseslottoactaspositioningandprotectionofthedaggerboard.Thisadditionalmaterialshallberemoveduponrequestofthemeasurer,forthemmeasurementofthedaggerboardcaseslot.(SeealsoCR3.2.2.11).

(j) Ahandleorballmaybeusedontheouterendof:

(i) Sprinthalyard.

(ii) Boomdownhaul.

15

(k) 1hole(diametermax8mm)onthecentrelineinthetopoftheforwardgunwalejustaftertheforwardtransom,fordrainage;1hole(diametermax8mm)onthecentrelineinthetopoftheaftgunwalejustbeforetheafttransom,fordrainageandorforfixingofanoptionalshock-cordtotensionthetoestraps.(seealso4.3);1hole(diametermax8mm)onthecentrelineinthedaggerboardcasetopside,aftofthedaggerboardslot,fordrainage.

(l) Oneortwoeyesmaybeattachedtothedaggerboardcase(seeCR3.3.5).

(m) Aneyestrapcanbeattachedtothethwartinfrontofthemasthole.Thiscanbeusedtosecurethemasttotheboat.

3.2.6.2 Backingplates,whenusedinGRPboats,shallcomplywiththePlansandlaid-inasshownonthisdiagram(i.e.topsurfaceofbackingplateflushwithtopofbottomfoamcore).

3.2.6.3 Toestrapscanbeattachedtothemidshipframe,usingatmost4fixingplates(twoforeachstrap)of50mm+/-10mmx20mm+/-5mmx2mm+/-1mmformetalplatesor50mm+/-10mmx20mm+/-5mmx7mm+/-3mmforplasticplates.

3.2.6.4 Fittings,includingbackingplates,shallconformtothedimensionsofthelaid-inbackingplatesandbesecurelyattachedtothemasshown.Thisruleshallbeeffectivefrom01.10.2016exceptthatboatsfittedandmeasuredwithmaststepdevicesnotcomplyingwiththisrulebythisdatewillremainClass legal.

3.2.6.5 Thefollowingitems,andothersnotspecificallypermittedbytheserules,areprohibited:

(a) Mainsheetcleats,mainsheethorse,trackortraveller.

(b) Suctionbailersandbilgepumps.

(c) Deckingorspraycoversofanysort.

(d) Anyapparatusorcontrivanceoutboard,orextendingoutboard,whichis,ormaybeusedtoassistInsupportingthehelmsmanoutboard.

(e) Anyfittingsconstructedinpartorwholeoftitanium.

16

3.2.6.6 FixingPlatesforRudderFittingsonhull.

EachRudderGudgeoncanbefixedontheafttransomwithonefixingplatepositionedinsidetheafttransom.Eachfixingplate,ifpresent,shallbeinmetal,excepttitanium,withmaximumdimensionsof60mmx25mmx3mm.Ifthefixingplateisnotusedawasherforeachboltcanbeused.

3.2.7 Bouyancy

3.2.7.1 Thehullshallbefittedwiththreebuoyancyunitsintheformofinflatedairbagsmadeofstrongfibre-reinforcedmaterial.Eachunitshallbe45litres+/-5litres.Eachunitshallbeequippedwithafillvalvethatpositivelypreventstheaccidentalreleaseofair(i.e.-Nonreturnvalvesandthreadedvalveswithscrew-oncaps).Theminimumweightofeachunitshallbe200grams.

3.2.7.2 Oneunitshallbeplacedalongthewholewidthoftheafttransomandoneunitshallbeplacedalongeachsidebetweenthemidshipframeandthemastthwartbulkhead.

3.2.7.3 Buoyancyunitsshallbesecurelyfastenedtothehullbythreestraps.Eachstrapshallbe45mm+/-6mmwideandshallberegularlychecked.1backingplateinGRPboatsofmetal50+/-10mmx20+/-5mmx2+/-1mmand1fixingplate,50+/-10mmx20+/-5mmx2+/-1mmifmetalor50+/-10mmx20+/-5mmx7mm+/-3mmifplastic,shallbeusedforfasteningofeachstrap.Attheafttransomcentrestrapabiggerplate50+/-10mmx50+/-10mmx2+/-1mmifmetalor50+/-10mmx50+/-10mmx7mm+/-3mmifplasticforcombinedusewiththetoe-strapshallbeused.Alternativelyaneyemaybeusedforattachmentoftheaftendofthetoestrapsatthecentrebuoyancybagattachmentpoint.

3.2.7.4 Theownerisresponsibleatalltimesforthebuoyancyandforensuringthatatintervalsofnotmorethan12months,thebuoyancyistestedandthemeasurementcertificateendorsedbyameasureroraresponsibleclubofficer.Themeasurementcertificateshallnotbevaliduntilsoendorsed.

3.2.7.5 Themeasurershallwitnessabuoyancytestasfollows:

Theboatshallbeswampedwithwaterandwithironweightsofnotlessthan60kgplacedaftofandwithin100mmofthemidshipframe,itshallfloatwiththegunwalesclearofthewater.Themeasurershallmakesurethatthebuoyancyanditsfasteningaresound,andthatinflatablebuoyancyshowsnovisiblesignsofdeflation,deteriorationordamage.

17

Asanalternative,themeasurershallhavethebuoyancybagsremovedfromthehull,fullyinflated,andthencheckfordeflation,deteriorationordamage.Themeasurershallthencheckeachstrapfordeterioration,damageorfrayingandthencheckeachstrapindividuallybyliftingthesideoftheboat(orthetransominthecaseoftheaftstraps)offtheground.Finally,thebagsshouldbereplacedintheboat,re-inflatedandthestrapscheckedtoensurethatthebagisheldsecurelyinplace.

3.2.7.6 Thefirstbuoyancytestshallnormallybecompletedatthetimeofthefirstmeasurementoftheboat.However,ifthemeasurercertifiesthatthebuoyancytestcouldnotbetakenatthattime,butinallotherrespectstheClassRulesaresatisfied,themeasurementcertificatemaybeissuedbutwiththeendorsement“Notvaliduntilabuoyancytesthasbeenpassed.”

3.2.8 Weight

3.2.8.1 Theweightofthehullindrycondition,including:ruddergudgeonsfixedtotheafttransom,buoyancystraps,toestrapsandassociatedfixings(withoutremovablefoamorprotection),maststep,blockfittingspermanentlyattached,butexcluding:correctorweights,blocks,mainsheet,buoyancyairbags,painter,bailer,paddle,compass(withbracketifany)andfixings,retainingclipsforwaterbottles,foodcontainersorotherpersonalequipmentandfixings,andallothernotspecificallypermitteditems,shallnotbelessthan32kg.

3.2.8.2 IftheweightofthehullinthesameconditionasprescribedinCR3.2.8.1butincludingbuoyancyairbagsislessthan35kgbutnotlessthan32.6kg,woodcorrectorweightsshallbefittedtobringthehullweightuptonotlessthan35kg.Thecorrectorweightsshallbepermanentlyfitted,halftotheforwardtransomandhalftotheafttransom.Nocorrectorweightsshallberemovedoralteredwithouttheboatbeingre-weighedbyanofficialmeasurer.Theweightofeachcorrectorshallbestampedorotherwisemarkedonthecorrectorandendorsedonthemeasurementcertificate.

(SeealsoCR3.2.7.1forminimumweightofbuoyancyairbags.)

3.3 Daggerboard

3.3.1 Materials

3.3.1.1 Boatsshalluseepoxydaggerboardsasspecifiedbelow.Woodorwoodepoxyboatsmayuseeitherwoodorepoxydaggerboards.Daggerboardspresentedforfirstmeasurementbefore28February2005andusedonboatsmeasuredbeforethatdatemayconformtotherulesvalidbefore1stMarch2004.

18

WOOD:

EPOXY:

Manufacturersshall,uponrequest,supplyalaminatedsampleandspecificationsofallmaterialsused.

3.3.1.2 Non-metallicreinforcement(bushing)ofdiameternotmorethan20mmmaybeusedaroundholes,screws,rivetsorbolts.

3.3.1.3 LaminatespecificationforEPOXYdaggerboard:

19

3.3.1.4 ForEPOXYfoilsthemanufacturer’sname,amanufacturergeneratedmouldidentificationnumberaswellastheyearofmanufactureshallbelaminatedintothedaggerboardincharacters10mm+/-2mmhighonthestarboardside,25mm+5/-0mmbelowthebottomedgeofthestopbatten.Forwoodenfoils,themanufacturer’snameandthemonthandyearofmanufactureshallbeindeliblymarkedinthesamepositionandwithcharactersofthesamesize.

3.3.2 Shape

3.3.2.1 Thedaggerboardshallbegenerallyarectangularflatplaneinshapeexceptthatthelowercornersshallberoundedtoaradiusofnomorethan32mm,andtheuppercornersshallberoundedtoaradiusofnomorethan5mm.Uppercornersandstopbattenedgesshallhavenosharpprojections.

3.3.2.2 Thethicknessofthedaggerboard(excludingbevels)shallbenotlessthan14mm(12mmforwoodenconstruction)andnotmorethan15mm.Bevellingispermittedbetweenalledges(exceptforthetopedge)andthebevellinglimits,situated60mmfromalledges.Thereshallbenobevellingunderneaththestopbattens.

3.3.2.3 Theoveralllengthofthedaggerboardshallbe1067mm+/-5mmandthewidth285mm+/-5mm.Withintheselimits,thelengthandwidthshalleachnotvarybymorethan3mm.

3.3.2.4 Thedaggerboardshallbefittedwithstopbattens,oneoneachsideofthedaggerboard.Sizesandshapesofstopbattensshallbegenerallyuniformwithoutcut-outsand/orsuddenchanges.Thebattensshallbemadefromwoodandextendoverthefullwidthoftheboardwiththetopofthebattenslevelwiththetopoftheboard.Thedepthshallbe35mm+/-5mmthroughout.Thethicknessoftheassembledstopbattensanddaggerboardshallbe45mm+/-5mmthroughout.Theexposededgesofthebattensshallberoundedtoaradiusof5mm+0/-2mm.Thebattensshallbefixedwithglue,andtwo5mm+/-1.5mmmetalboltsandnuts.Thelengthofthesefastenersshallbethesame+0/-5mmasthethicknessoftheassembleddaggerboardandstopbattens.

3.3.3 Theweightofthedaggerboard,withoutattachmentorpositioningfeatures,shallbenotlessthan2.0kg.Ballastingorcut-outsofthedaggerboardareprohibited.Thecentreofgravityoftheassembleddaggerboardandstopbattensshallnotbelessthan520mmawayfromtheloweredge.

3.3.4 Thedaggerboardshallfloat,andshallbeattachedtothehull.Oneholeshallbedrilledthroughthedaggerboardandthebattensinanyplace.Itsdiametershallnotexceed10mm.Anelasticcordorlanyardshallbeusedtoattachthedaggerboardtothehull.Asmallshacklemaybeusedtoattachtheelasticcordorlanyard,eithertothehullorthedaggerboard.

20

3.3.5 Thedaggerboardmaybeheldinthedaggerboardcasebyaloopof(elastic)cord.Thecordmaybefixedtothedaggerboardcasethroughoneortwoeyesortothemastthwartbulkheadthroughtwooptionalholes,withadiameterofnotmorethan10mm.Thepositionoftheholesshallbeinaccordwithhullsheetplan16/24.Asingleextraloopofrope,tapeorelasticcordmaybeattachedtothisloopinordertoassistwiththeprocessofloweringandraisingthedaggerboard.Boththeelasticcordandtheadditionalloopmaybepaddedbyusingflexiblehollowtubing.

3.4 Rudder and Tiller

3.4.1 Materials

3.4.1.1 Boatsshalluseepoxyruddersasspecifiedbelow.Woodorwoodepoxyboatsmayuseeitherwoodorepoxyrudders.Rudderspresentedforfirstmeasurementbefore28February2005andusedonboatsmeasuredbeforethatdatemayconformtotherulesvalidbefore1stMarch2004.

WOOD:

EPOXY:

Manufacturersshall,uponrequest,supplyalaminatedsampleandspecificationsofallmaterialsused.

3.4.1.2 ThetillerandtillerextensionofEPOXYruddersshallbemadeofaluminium.Thetillerandtillerextensionofwoodenruddersmaybemadeofwoodoraluminium. Theuseofagripmadeofplasticand/orrubberonthetillerextensionispermitted.Thejointbetweenthetillerandextensionmaybemadeofmetal(butnottitanium),rubberorplastic.

3.4.1.3 Non-metallicreinforcement(bushing)ofdiameternotmorethan20mmmaybeusedaroundscrews,rivetsorbolts.

21

3.4.1.4 Laminatespecification(forEPOXYrudder)

3.4.1.5 ForEPOXYfoilsthemanufacturer’sname,amanufacturergeneratedmouldidentificationnumber,aswellastheyearofmanufactureshallbelaminatedintotherudderincharacters10mm+/-2mmhighonthestarboardside,25mm+5/-0mmbelowthebottomedgeofthetiller.Forwoodenfoils,themanufacturersnameaswellastheyearofmanufactureshallbeindeliblymarkedinthesamepositioninthesamesizecharacters.

3.4.2 Shape

3.4.2.1 Theruddershapeshallbeasfollows:

3.4.2.2 Thethicknessoftherudder(excludingbevels)shallbenotlessthan14mm(12mmforwoodenconstruction)andnotmorethan15mm.Bevellingispermittedbetweentheedgesandthebevellinglimits,situated60mmfromalledges.Nobevellingispermittedonthetopoftherudderhead.

22

3.4.2.3 Thetillershallberemovableandshallbefixedtotherudderbytwometalboltsof5mm+/-1.5mmdiameter.Thefittingconnectingtillerandtillerextensionisoptional.Tiller,tillerextensionandfittingsshallhavenosharpprojections.

3.4.2.4 Thetillerandtillerextensionshalleachbenotmorethan750mmlongandtheircombinedlengthshallnotbemorethan1200mm.

3.4.3 Theassembledrudder,tillerandtillerextensionshallfloat,andtheirtotalweightshallnotbelessthan1.5kg.Ballastingofanypartofthisassemblyisprohibited.

3.4.4 DefinitionofRudderelements

3.4.4.1 Bearinglines:twohorizontallines(paralleltothebaseline)throughthebearingpointsoftherudderfittings.

3.4.4.2 Rudderheadfrontline:linepassingthroughtheintersectionsoftheforwardedgeoftherudderandthetwobearinglines.

3.4.5 Fixingandpositioning:

Boatsbuiltbefore1March1992mayeitherusetherudderpositioningmethodwhichwasapplicableatthetimeofbuilding,orthecurrentone.Thepositioningfittingsoftherudderthemselvesshallthencomplywiththecorrespondinglydatedrulesfortherudder.

3.4.5.1 Twopintlesshallbefixedontherudder,theirdiametershallbenotmorethannominal6mm.Thedistancebetweentheupperedgeofthetillerandthebearinglineoftheupperpintleshallbenotlessthan85mm,measuredalongtherudderheadfrontline.Twogudgeonsshallbefixedtotheafttransom,withholesnotlessthan6mmdiameter.Thedistancebetweenthebearinglinesofthetwogudgeonsshallbenotlessthan200mm.Thecorrespondingdistancebetweenthepintlesshallbenotmorethan200mm.Thedepthofthepivotingholesinthetwogudgeonsshallnotexceed5mm,andthedistancesfromthoseholestotheaftfaceoftheafttransomshallnotdifferbymorethan2mm.

3.4.5.2 Therudderandtillerassemblyshallbefittedtotheafttransomsothatitdoesnotbecomedetachedfromthehullduringacapsize.Tothiseffect,anappropriateretainingclip/springshallbefittedontheforwardedgeoftherudderhead,notlessthan5mmbelowthebearinglineoftheupperpintle.

3.4.5.3 Whenfittedtotheafttransom,thedistancesfromtherudderheadfrontlinetotheaftfaceoftheafttransom,measuredatthepositionofbothbearinglines,shallbenotmorethan45mmandshallnotdifferbymorethan2mm.

3.5 Spars

3.5.1 Materials

3.5.1.1 Thesparsshallbemadeofeither,aluminiumalloytubeor,ofsolidwood.Woodensparsshallbeofnotmorethantwopiecesofwood.Anyexploitationoftolerancesinordertoachievenon-circular,taperedor

23

otherwisevariablespars,isprohibited.Thewallthicknessofthealuminiumalloytubingshallbeconstantthroughoutthespars.Internalsleeves,ribsandstiffeningareprohibited.

3.5.1.2 Plastic,woodormetalmaybeusedforendcapsandfittingsincludingtheboomjaws.Endcaps,spritendandjawsfittingsshallbepermanentlyfixedbutmaybegluedtothespars.Thelengthofthefittingsandcapshallnotexceed100mmforthelowerendofthemast,theoutboardendoftheboomandthejawsfitting,60mmforthetopofthemastandbothendsofthesprit.Atthetopofthemasttheheightofthevisiblepartofanoptionalendcapshallnotexceed10mm.

3.5.1.3 Sparsshallbecapableoffloatingapproximatelyhorizontallyforthirtyminuteswithnodiscerniblewaterpenetrationforasealedsparorlossofbuoyancyforafoamfilledspar.

3.5.1.4 Unlessspecificallypermittedbytheserules,fittingsonsparsshallbepermanentlyfixedbymeansofrivets,screws,and/ornutsandbolts.

3.5.1.5 Non-metallicprotectivematerialmaybeusedonthespritattheareawherespritandmastmakecontact.Thismaterialshallnotexceedmax.150mmlengthandmax.1.5mmthickness.

3.5.2 Mast

3.5.2.1 Themastshallbeapproximatelycircularinsection.Thediametershallbe45mm ± 0.5mm.

3.5.2.2 Mastsshallbeofuniformsectionabove50mmfromtheheel.WoodenmastsmaybereinforcedwithaGRPorplasticcollarwhichshallextendnotmorethan800mmabovetheheelandshallnotincreasethediameterbymore than 4 mm.

3.5.2.3 AnaluminiummastmaybefittedwithnotmorethantwosleevesofGRPorplastictoallowittofitalargerdiametermastthwartholeandmaststep.Eachsleeveshallbeofuniformwallthicknessandshallnotextendalongthemastformorethan50mm.

3.5.2.4 Theoveralllengthofthemastshallbenotmorethan2350mm.

3.5.2.5 Standingriggingofanysortisprohibited.

3.5.2.6 Themastshallhaveeithertwoholes,inanydirectioninthehorizontalplane,ortwoeyes,whichneednotbepermanentlyfixed,oroneeyeandonehole.Theupperedgeofoneoftheholesoreyesshallbenotlessthan20mmfromthetopofthemastandtheupperedgeoftheothernotlessthan120mmfromthetopofthemast.Lacinglinesshallpassthroughtheseeyesorholesandshallbelashedthroughtheeyeletatthethroatofthesail,seealsoCR.6.6.3.1.Awindindicatororwindindicatorfittings(CR.3.5.2.12)maysecure,orbesecuredbytheselacinglines,butthisdoesnotreleasethelinesfromtheobligationofpassingthroughtheholesoreyes.

24

3.5.2.7 Distinctivelycolouredbands,clearlyvisiblewhileracing,andeachnotlessthan10mmwideshallbemarkedonthemastasfollows:

(a) BandNo.1,theloweredgeofwhichshallbenotlessthan610mmfromthetopofthemast.

(b) BandNo.2,theupperedgeofwhichshallbenotmorethan635mmfromthetopofthemast.

TheloweredgeofBandNo.1andtheupperedgeofBandNo.2shallbepermanentlymarkedbyascribedlineornotlessthantwomarksmadewithacentrepunch.

3.5.2.8 Themastshallbepositionedinthemaststepbymeansofwedges,blocksorotherdevicessothatitshallbeunabletomovemorethan3mminanyhorizontaldirection.Thepositionoftheheelofthemastshallnotbevariedwhileracing.

3.5.2.9 Themastshallhaveacleatinasuitablepositionforsecuringtheboomdownhaul.

3.5.2.10 Themastshallhave,inasuitableposition,forthesprit,eitheracleatandoneholeoreye(whichneednotbepermanentlyfixed),oratoothedrack.

3.5.2.11 Alockingdeviceorotherarrangementshallbefittedandusedtopreventthemastfromcomingoutofitsstepwhentheboatiscapsized.

3.5.2.12 Awindindicatormaybefittedtothetopofthemast.Themastmayhaveafitting(whichneednotbepermanentlyfixed)forsecuringthewindindicator.Suchafittingshallbepositionedwithin150mmbelowthetopendofthemastanditshallhavenosharpprojections.Thewindindicatororitsattachmentfittingsmaybeusedtohelpsecurethelacinglinesfromthethroatofthesail.Thewindindicatorshallnothaveanysharppoints.

3.5.2.13 Themastmayhaveapinstoppositionedontheforwardsideofthemast1680mm+/-10mmbelowthetopendofthemast.Thispinshallnotbemorethan8mmdiameterandwithin10mmofthesurfaceofthemastandshallhavenosharpprojections.

3.5.3 Boom

3.5.3.1 Theboomshallbeapproximatelycircularandofuniformsectionthroughout.Thediametershallbenotlessthan29.5mmandnotmorethan55.5mmandatanysectionitshallnotvarybymorethan1mm.

3.5.3.2 Theboom,excludingtheboomjaws,shallnotexceed2057mminlength.

3.5.3.3 Thetypeofboomjawsandjawsfittingisoptionalbutthicknessofthejawsshallnotexceed35mmandthelengthofthejawsfittingsshallnotexceed100mm.Aropemaybefastenedtotheboomjawsorjawsfittingsthroughtwoholesorthroughtwoeyes,andpassforward,aroundandoverapinpositionedontheforwardsurfaceofthemast(SeealsoCR3.5.2.13).

25

3.5.3.4 Adistinctivelycolouredband,clearlyvisiblewhileracing,andnotlessthan10mmwideshallbemarkedontheboomwithitsforwardedgenotmorethan2000mmfromtheaftedgeofthemast.Theinneredgeofthebandshallbepermanentlymarkedbyascribedlineornotlessthantwomarksmadewithacentrepunch.Thecolouredbandattheoutboardendoftheboommaybeonapermanentlyfixedendcap,providedthatnovisiblepartoftheendcapextendsinwardofthepositionoftheforwardedgeoftheband,andthatthecapcomplieswiththeformerpartofthisrule,andwithclassrule3.5.3.2.

3.5.3.5 Eithertheboomortheendcapshallhaveaholeorlacingeye.Theforwardedgeoftheholeortheopeningoftheeyeshallbenotmorethan40mmfromtheinneredgeofthebandattheoutboardendoftheboom.

3.5.3.6 Acleatwithnosharpprojectionsforsecuringaclewouthaulmaybefittedontheboom.Itshallbenotlessthan400mmfromtheouterendoftheboom.

3.5.3.7 Theboomdownhaulmaybeattachedtotheboominanoptionalmannerbyuseofafixedstoporlacingeyeatafixedposition.Attachedtotheuppersideoftheboom,thebearingedgeofthefittingusedshallnotbemorethan200mmfromtheinnerendoftheboomexcludingboomjaws.Attachedelsewhere,theouteredgeofthefittingusedshallnotbemorethan200mmfromtheinnerendoftheboomexcludingboomjaws.

3.5.3.8 Themethodofattachmentofthemainsheetormainsheetblock(s)totheboomisoptional(providedtheycannotslipalongtheboom,andthemaximumclearancebetweenthespanandtheboomshallbenotmorethan100mm,atanypositionalongtheboom).Thepositionoftheblocksorthelengthofboomstropsshallnotbeadjustedwhileracing.Providedtheycannotslipalongthespan,theuseofmultipleringsonthespanispermitted.Eachblockshallnothavemorethan2sheaves.

3.5.3.9 Thereshallnotbeanyfitting,riggingordevicethepurposeofwhichis,ormaybe,tocontrolthepositionoftheboomonthemastexceptforitemsspecificallyrequiredorpermittedbytheserules.

3.5.4 Sprit

3.5.4.1 Thespritshallbeapproximatelycircularandofuniformsectionthroughout.Itsdiametershallbe27.5mm±2mm.

3.5.4.2 Thespritshallbenotmorethan2286mminlength,includingendfittings.

3.5.4.3 Thetypeoffittingattheupperendofthespritshallbeasshownintheriggingplan.Iftheupperendfittingexhibitsawideningafteraninitialnarrowing,thiswideningshallnotbeinexcessof13mm.Thefittingatthelowerendofthespritshallbeeitheroneofthefittingspermittedatitsupperend,orthespritmaybefittedwithaneye,ahook,oritmayhaveaholethroughthespar.Thelengthoftheendfittingsonbothendsshallnotexceed60mm.Theeye,hookorholeatthelowerendofthespritifpresent,shallbelocatedwithin60mmofthisend.

26

3.5.5 Running Rigging

3.5.5.1 ThemainsheetarrangementisoptionalexceptascontrolledbyCR3.2.6.1and CR 3.5.3.8.

3.5.5.2 Downhaul.Asinglepartdownhaulofropeand/orwireshallbefittedtotheboomnotmorethan200mmfromtheinneredgeoftheboomjaws.Itshallbesecuredtoacleatonthemast.Thedownhaulshallnotbeadjustablefromaftofthemidshipframe.

3.5.5.3 Onlythelowerendofthespritshallbemadefasttothemast.Theonlymethodsofattachmentandadjustmentofthelowerendofthespritshallbebymeansof:

(a) Aropeorwireropeloopinconjunctionwithatoothedrack.Themaximumdimensionsofthetoothedrackare:

Length 150 mm

Width 20 mm

Thickness 3mm

Heightoftooth 10mm

OR

(b) Ahalyardconsistingofnotmorethantwopartsofropeorrope/wirecombination,withnomorethantwosinglesheaveblocks,toobtainnomorethanadouble“Purchase”plusoneholeoroneeye,andonecleatwhicharefastenedonthemast.Thewayofattachingtheblocksonthelowerendofthespritoronthemastisoptional.Thespritshallnotbeadjustablefromaftofthemid-shipframe.

3.5.5.4 Outhaul.Theouthaulshallbemadeofaropenotmorethan1200mmlong.Itmaybeadjustable.Inthiscaseitshallusenomorethantwopurchases;noblocksareallowed;andtheouthaulendshallthenpassthroughtheholeorlacingeyeneartheendoftheboom(seealsoCR3.5.3.5)andbesecuredtotheouthaulcleatontheboom.

3.5.5.5 Theuseofwireisprohibitedexceptfortheboomdownhaul,sprithalyardandstropsontheboomforfittingsheetblocks.

3.5.5.6 Norunningriggingshallbeallowedinsideofhollowspars.

4. ADDITIONAL RULES

4.1 Onlyonepersonshallbeonboardwhileracing.

4.2

(a) ThehelmsmanshallwearapersonalflotationdevicetotheminimumstandardISO12402-5(Level50)orequivalent.Allfasteningdevicessuppliedbythemanufacturershallbeusedinthemannerintended.Awhistleshallbecarriedsecurelyattachedtothepersonalflotationdevice.

27

(b) WithreferencetotheRacingRulesofSailingthetotalweightofclothingandequipmentwornorcarriedbyacompetitor,excludingfootwearshallnotbecapableofexceeding8kgwhenweighedasprovidedinAppendixHoftheRacingRules.

(c) Hikingpantsarepermittedprovidedtheyarenotattachedtotheboatanddonotcontainanystiffeningwhichcanextendbelowthekneejoint.

4.3 Thefollowingequipmentshallbeonboardwhileracing:

(a) Oneormorebailerswhichshalleachbeindividuallyandsecurelyattachedtothehullbyalanyard(s)orelasticcord(s).Onebailershallhaveaminimumcapacityofonelitre.

(b) Apainterofasinglepieceofbuoyantrope,notlessthan5mmdiameterandnotlessthan8mlongsecurelyfastenedtothemastthwartormaststep.(seealso3.2.6.1).

(c) Apaddleofwoodand/orplastic,weighingnotlessthan200g,havingcornerradiiofminimum5mmandabladeabletocontainarectangleof200mmx130mmshallbesecurelyattachedtothehullbyalanyardorelasticcord.

4.4 Ananchorneedbecarriedonlywhenspecificallyprescribedinthesailinginstructions.

4.5 Unlessdamagerendersahull,sail,sparorfoilunusableduringanevent,onlyonehull,sail,mast,boom,sprit,daggerboardandruddershallbeusedthroughouttheevent.Anysuchchangeofequipmentshallbeauthorisedbythe Technical Committee orinitsabsencebytheRaceCommittee.

4.6 IfthereisanationalOptimistClassAssociationofthecountryinwhichtheboatisregistered,theownershallbeamember.Whereaboatissailinginaninternationalregatta,thecompetitorshallbeamemberofanationalOptimistassociationorotherbodywhichisitselfamemberoftheIODAasdefinedinIODAArticle3(a).

5. SPARE RULE NUMBER

6. SAIL

6.1 General

6.1.1 SailsshallcomplywiththeClassRulesinforceatthetimeofcertificationunlessotherwisespecifiedbelow.

6.1.2 Anythingnotspecificallypermittedbytheserulesisprohibited,seealsoCR.1.2.

28

6.1.3 SailsshallbemadeandmeasuredinaccordancewiththecurrentWorldSailing“EquipmentRulesofSailing”asapplicabletoOptimistsails,exceptwherevariedherein.WhereatermdefinedormeasurementgivenintheseWorldSailingRulesisusedintheserules,itisprintedin“italic”type.Allmeasurementsshallbetakenalongthesurfaceofthesailandincludeanyboltropeandtabling.Battensshallnotberemovedforsailmeasurementpurposes.

6.1.4 Certification

AmeasurerapprovedbyanMNAoraClassAssociationwheresoauthorisedbyanMNA,shallcertifythesailinthetackandshallsignanddatethecertificationmark.

6.2 Sailmaker

6.2.1 Nolicenceisrequired.

6.2.2 Thethicknessofthebody of the sailshallbenotlessthan0.15mm.Whereintheconstructionofthebody of the sailtheclothisofvariablethickness,thethinnestpartsofthesailasmeasuredbyamicrometerwithaspindlesurfaceof6.4mm+/-0.25mmdiametershalleachbeatleast9mmx9mmsquare,andthethicknessoftheclothshallbedeemedtobethatofthethinnestparts.SailswhicharenotsoconstructedshallceasetocomplywithClassRulesfrom1March2005.

Thethicknessinmmofthebody of the sailshallbeindeliblymarkedbythemanufacturer,togetherwithhissignature,stamp,anddatenearthepeak point.

6.2.3 Forthepurposeofrepairingasail,plydifferenttotheplyofthebodyofthesailmaybeuseduptoalimitofonepaneloronesecondaryreinforcement.

6.3 Mainsail

6.3.1 Identification

6.3.1.1 TheclassinsigniashallconformwiththedimensionsandrequirementsasdetailedinthediagraminCR2.7.1andbeplacedinaccordancewiththediagramcontainedinSailPlanSheet4/5.Nopartoftheclassinsigniashallextendbeyond1000mmofthepeakpoint.Theclassinsigniashallbeplacedbacktobackonbothsidesofthesail.

6.3.2 Materials

Theplyfibresshallbeofpolyesterorcotton.

6.3.3 Construction

6.3.3.1 Theconstructionshallbe:softsail,singleplysail.

6.3.3.2 Thebodyofthesailshallconsistofthesamewovenplythroughout.

6.3.3.3 Thesailshallhavetwobattenpocketsintheleech.Localwideningforbatteninsertion(ifany)shallbeontheupperedgeofthebattenpockets.Theouterendofthebattenpocketsshallbeparalleltotheleechatthatpoint.

29

6.3.3.4 Theleechshallnotdeviatemorethan+5/-10mmfromastraightlinebetween:

(a) thepeakpointandtheintersectionoftheleechandtheupperedgeofthetopbattenpocket.

(b) Theintersectionoftheleechandtheloweredgeofthetopbattenpocketontheintersectionoftheleechandtheupperedgeofthelowerbattenpocket.

(c) Theclewpointandintersectionoftheleechandtheloweredgeofthelowerbattenpocket.

SailswhichdonotcomplywithCR6.3.3.4shallnotbeusedafter1March2005.

6.3.3.5 Theleechshallnotdeviatemorethan+20/-5mmfromastraightlinebetweentheintersectionoftheleechandtheloweredgeofthetopbattenpocketandtheclewpoint.Sailspresentedforfirstmeasurementafter1March2005shallcomplywiththisrule.

6.3.3.6 Thefollowingarepermitted:stitching,glues,boltropes,tabling,2battenpockets,battenpocketelastic,battenpocketpatches,flutterpatches,onetrapezoidalwindow,sailmakerlabel,sailbutton(s),telltales.FurthertoCR1.2and6.1.2,thefollowingareprohibited:carbonfibres,titanium.

6.3.3.7 Primaryreinforcementsshallbemadeofwovenplyofanythickness.Theplyfibresshallbemadeofpolyesterorcotton.

6.3.3.8 Secondaryreinforcementsshallbemadefromthesamewovenplyasthebodyofthesail,withtheexceptionthatbattenpocketpatchesandflutterpatchesmaybemadefromawovencottonorpolyesterply,thinnerthanthatofthebodyofthesail.Edgesofsecondaryreinforcementsshallbefixedbyamaximumoftwolinesofstitchesorbondingagents.Parallelornearlyparallellinesofstitchingorbondingagentusedelsewhereinthesecondaryreinforcementshallbemorethan40mmapart.Iftworowsofcloselypositionedstitchingareusedtofixtheedgeofthesecondaryreinforcementthenanyinnerlinesofparallelstitchingshallbemorethan40mmdistantfromtheinnerlineofedgestitching.

6.3.3.9 Tablingshallbeeitherbyfoldsofthebodyofthesail,orofseparatepolyesterorcottonmaterialnotthinnerthanthebodyofthesail.

6.3.3.10 Eachbattenpocketpatchshallconsistoftwocircularlayersofwhiteply.Plydifferenttotheplyofthebodyofthesailmaybeused.Sailsfirstpresentedforcertificationafter1May2015shallcomplywiththisrule.Sailspresentedforcertificationafter1April2020shallcomplywithcircularlayers.

6.3.3.11 Wireorelasticcordshallnotbeusedinthesail.Anyboltropeortablingusedtostrengthenthelufforheadofthesailshallbefastenedtothesailthroughoutitsentirelength.Ifaboltropeisenclosedinthetabling,itshallbesewntothesailbyvisiblestitchesatthosecornersofthesailtowhichtheropeextends.Noboltropeispermittedintheleechorfoot.

30

6.3.3.12 Thereshallbe8eyeletsinthefootofthesail,includingthoseatthetackandclew.Thereshallbe8eyeletsintheluffofthesail,includingthoseatthethroatandtack.(SeealsoCR6.4forspacingbetweeneyeletsinluffandfoot.)

6.4 Dimensions

31

6.5 Class Insignia, National Letters and Sail Numbers, Luff Measurement Band

6.5.1 Numbersandlettersonsailsshallbeofthefollowingdimension(seealsoSail Plan sheet 4/5)

Thenationallettersshallbeplacedonthesamelineonoppositesidesofthesailwithlettersonthestarboardsideofthesailclosertotheluffthanthoseontheportsideofthesail(seealsoSailPlansheet4/5).Thenumbersshallbeplacedintworowsbelowtheletterswiththestarboardsidenumbersuppermost.Thefollowingspacingshallapply:

6.5.2 Thesailshallhaveasailmeasurementbandonitsluff(luffmeasurementband).Thisband,ofacolourthatstronglycontrastswiththesail,shallbepermanentlyfixedormarkedonbothsidesofthesail.Itshallbeperpendiculartotheedgeoftheluffofthesail,andshallstartatitsedge.SeeCR3.5.2.7andSailPlanforpositionanddimensionofbands.

6.6 Additional Rules

6.6.1 OnlysailsendorsedinaccordancewithCR2.5.6shallbeused.

6.6.2 Themanufacturerofsail battensisoptional.Theconstructionmaterialisoptionalexceptthatcarbonfibreisprohibited.

6.6.3 Fasteningandpositioning.

6.6.3.1 TheupperedgeoftheluffmeasurementbandshallnotextendabovetheloweredgeofBandNo.1,andtheloweredgeoftheluffmeasurementbandshallnotextendbelowtheupperedgeofBandNo.2.Atthethroat,bothmastholesorlacingeyesreferredtoinCR3.5.2.6shallbeusedtopreventanypartoftheluffmeasurementbandrisingabovetheloweredgeofBandNo. 1.

6.6.3.2 Nopartoftheclew pointshallextendbeyondtheinneredgeoftheboomband.

32

6.6.3.3 The luffofthesail shallbelashedtothemastateacheyeletsoastobewithin10mmofthemast.

6.6.3.4 Thefootofthesailshallbelashedtotheboomateacheyeletsoastobewithin10mmoftheboom.Alternatively,atthetackeyelet,itmayeitherbelashedtothejawfittingsorattachedthroughtwoholesinthejawsorjawfittings,soastobewithin10mmoftheboomoritsimaginaryextension(see also Rigging Plan sheet 12/12).

6.6.3.5 Thesailshallbefastenedtothemastandboomwithcordageonly.

6.6.3.6 The peakofthe sail shallbefastenedtotheupperendofthespriteitherbymeansofaneyeletatthepeak,orbymeansofaloopmadeoftapeorropesewntothepeak.

33

Appendix A

Class Rules Specific To Wood and Wood/Epoxy Hulls

2.5.1 OnlyameasurerofficiallyrecognisedbyaNationalAuthorityshallmeasureahull,spars,sailsandequipment,andsignthedeclarationonthemeasurementformthattheycomplywiththeClassRules.Hullsshallbemeasuredinaccordancewiththeappropriatehullmeasurementinstructions.Afterthemeasurerhassignedthemeasurementform,heshallaffixtheWorldSailingplaquetothemastthwartbulkheadasperCR2.7.2

2.5.4 Allhullsshallcomplywiththecurrentrulesortherulescurrentatthetimetheboatwasfirstmeasured.Hullsfirstmeasuredbetween1March1997and1March1998shallconformeithertotheclassrulesinforcefrom1March1995ortheclassrulesinforcefrom1March1997.Hullsfirstmeasuredafter1March1998shallconformtotheclassrulesthencurrent.Fittings,spars,sailsandotherequipmentshallcomplywiththecurrentrulesunlessotherwisestatedinthespecificclassrulereferringtosuchequipment.

3.2.1 Materials-WOODANDWOOD/EPOXY

3.2.1.1 ThehullshallbeconstructedofmaterialsapprovedbyWorldSailing.Thefollowingarethecurrentlyapprovedmaterials:wood.

3.2.1.2 Hullsshallbeconstructedfrom:

Thebuildershallonrequestsupplyasampleandspecificationsheetofanyplywoodused.

3.2.2.1 Thedimensionsofthehullshallbeasshownontheplansandasgivenintheserules,diagramsandmeasurementformandshallconformwiththetolerancesstatedtherein.

3.2.2.5 Theoveralllengthexcludingrudderfittings,shallbe2300mm+/-12mm,measured at the sheerline.

3.2.2.9 Theforwardandafttransomshallbeflatwithnotmorethan5mmtolerance.

34

3.2.2.10 Theinsideofthedaggerboardcaseandoftheslotinthehogandbottompanelshallbe330mm+/-5mm.Theendsinthedaggerboardcaseslotshallbeparallelandsquaretothebaseline.Araketotapernotexceeding5mmispermitted.Theupperedgeofthedaggerboardcaseshallbeparalleltothebaseline,withatoleranceof5mmmaximum.

3.2.2.11 Theinsidewidthofthedaggerboardcaseandtheslotinthehogandbottompanelshallbe17mm+/-1mm.Theforeandaftendsoftheslotshallbesemi-circularincrosssection.(SeealsoCR3.2.6.1)

3.2.2.12 Theoutsideedgesofthehullbetweenbottomandsidepanels,betweenthebottomandforwardtransom,andbetweenthesidepanelsandforwardtransomshallberoundedtoaradiusof4mm+/-2mm.Attheafttransomsideandbottomoutsideedgesnoradiusispermitted.

3.2.3 Woodandwood/epoxyHullConstructionDetails

3.2.3.1 Thereshallbeamastthwartpositionedasshownontheplan.Itshallbe195mm+/-5mmwideandnotlessthan16mmnormorethan25mmthick.

3.2.3.2 Thereshallbeamastthwartbulkheadfixedtotheaftsideofthemastthwart,andinwoodenhullstothesidepiecessecuredtothesidepanels,asshownontheplans.

3.2.3.3 Thereshallbeamidshipframepositionedasshownontheplanswithlimberholesinthepositionsshown.

3.2.3.4 Theshapeoftheholeinthemaststepisoptional.(SeealsoCR3.2.6.1(f)).

3.2.4 ConstructionDetails-Wood

3.2.4.1 HullsofTraditionalWoodConstruction

(a) Thehog,bilgestringersandchineshallbeofwoodbondedtotheinsideofthebottompanel.theyshalleachbeofuniformthicknessandshalleachbeofuniformwidth:

(i) forthehog16x100mmmin

(ii) forthebilgestringerschineandgunwale16x35mmmin.

(b) Thescantlingsfortheframes,hog,stringersandchineshallbecompliedwithbutexposedcorners,exceptforthegunwale(seerule(i)below),mayberoundedtoamaximumradiusof5mm.

(c) notusedinthisversion

(d) not used in this version

(e) Themidshipbottomframeandthedaggerboardcasesidesshallbeofplywoodwithanominalthicknessof12mm.

(f) Asoptionalconstruction.thebowandafttransomsshallbeofplywoodwithanominalthicknessofmin.6mmandmax.12mm.

(g) Thebottomandsidepanels,kneesandmastthwartbulkheadshallbeofplywoodwithanominalthicknessnotlessthan6mm.

35

(h) Thebottomandsidepanelsshalleachbeofthesamenominalthicknessthroughout.

(i) Theexposededgesofthegunwalestringerandtherubbingstrakeshallberoundedtoaradiusofnotlessthan5mm.

(j) Thekneesatthetransommaybeinsetsothattheiruppersurfacesarelevelwiththetopofthegunwalestringers.

(k) Exposededgesofplywoodmaybecappedwithsolidwoodorplywood.Thedepthofthecappingshallnotexceedthethicknessoftheplywoodbeingcoveredanditswidthshallnotexceedthewidthofthepartofassembledpartsbeingcapped.

3.2.4.2 HullsofWood/EpoxyConstruction

(a) Thehogandbilgestringersshallbeofplywoodbondedtotheinsideofthebottompanel.Theyshalleachbeofuniformthicknessandshalleachbeofuniformwidth:

(i) forthehognotlessthan180mmwide;

(ii) forthestringersnotlessthan70mmwide,exceptforwardofthemastthwartbulkheadwheretheymaybetaperedtoconformtotheshapeofthebottompanels.

(iii)thethicknessofthebottompanelandhogorstringerstogethershallbenotlessthan15mm

(b) Alternativelythebottommaybeconstructedofoneormoresheetsofplywoodwithatotaluniformthicknessofnotlessthan15mm.Whensuchaconstructionisused,hogandstringersarenotrequired.

(c) Thescantlingsshownontheplansfortheframes,hogandstringersshallbecompliedwithbutexposedcorners,exceptforthegunwale(seerule(f)below),whichmayberoundedtoamaximumradiusof5mm.

(d) Thebottompanelshalleitherbestitchedtothesidepanelsandtransomswithcopperwireatspacingofnotmorethan60mm,and/orgluedwithepoxyglue.Thejointsmaybetapedinsideand/oroutsidewithglasstapeandresin.

(e) Jointsbetweenmidshipframeandbottompanel,midshipframeandthesidesshallbetapedwithglasstapeandresinorgluedwithepoxygluefillets.

(f) Themidshipbottomframeandthedaggerboardcasesidesshallbeofplywoodwithanominalthicknessof12mm.

(g) Asoptionalconstruction.thebowandafttransomsshallbeofplywoodwithanominalthicknessofmin.6mmandmax.12mm.

(h) Thebottomandsidepanels,kneesandmastthwartbulkheadshallbeofplywoodwithanominalthicknessnotlessthan6mm.

36

(i) Thebottomandsidepanelsshalleachbeofthesamenominalthicknessthroughout.

(j) Theexposededgesofthegunwalestringerandtherubbingstrakeshallberoundedtoaradiusofnotlessthan5mm.

(k) Thekneesatthetransommaybeinsetsothattheiruppersurfacesarelevelwiththetopofthegunwalestringers.

(l) Exposededgesofplywoodmaybecappedwithsolidwoodorplywood.Thedepthofthecappingshallnotexceedthethicknessoftheplywoodbeingcoveredanditswidthshallnotexceedthewidthofthepartofassembledpartsbeingcapped.

Plans

Thefollowingarethecurrentofficialplans:(WoodandGRP)

New95GRPplans March1995

AmendedMarch1996

TraditionalWoodenPlans March1997

Wood/EpoxyPlans March1997

RiggingPlan March1991Amended1994

FoilPlan Obsolete

SailPlan March1994

Effective:1January2021

© 2021 World Sailing Limited LastIssue:1January2020

37

Addendum

BelowaredetailedreferencestotheWorldSailingRegulationsthatarementionedinourclassrules.Theseextractsareaccurateasof1stJanuary2016,pleaseconfirmthattheyhavenotbeenamendedbycheckingontheWorldSailingwebsite.

https://www.sailing.org/tools/documents/2021RegulationsClean-[26818].pdf

World Sailing Advertising Code

20.2.4 AnyAdvertisingandanythingadvertisedshallmeetgenerallyacceptedmoralandethicalstandards.AnyAdvertisingwhichispolitical,religious,racialorpropagandashallnotbedisplayedonaboat, personal equipment oranyotherobjectonboardaboatwhileRacing.AttentionisalsodrawntothelawsofindividualnationswhichmayrestrictAdvertisingwithintheirterritoryorterritorialwaters.(SeeClassRule2.8)

20.3 Competitor’s Advertising

20.3.2 SubjecttoanylimitationsonAdvertisingintheapplicableclass rulesortherulesoftherelevantSystem,AdvertisingchosenbythePersoninChargemaybedisplayedon a boatorpartthereof,exceptonthe areas detailed in Regulation 20.4 andTable1.

SeetheWorldSailingwebsitefordetailsofTable1.ThepictureleftshowsthespacethatcanbeusedforbothEventAdvertisingandcompetitoradvertising.Sailorsmayalsodisplayadvertisingontheirclothingprovidedthatitcomplieswithclassrule2.8andWorldSailing20.2.4above.Pleasenotethatatsomeevents(IODAteamracingeventsforexample)sailorsmayberequiredtowearbibsorothermeans

ofidentificationwhichmaycoverpersonaladvertising.ThisrequirementshouldbestipulatedintheNoticeofRacefortheevent.

38

20.6 Sponsor’s Advertising of World Sailing Classes and Recognized Systems

20.6.1 AWorldSailingClassandaRecognizedSystemmayenterintoacontractwithasponsorwhichwillrequiretheboatsofthatWorldSailingClassorcertifiedunderthatRecognizedSystemtodisplaysuchsponsor’sAdvertisingprovidedthat:

(a) therelevantClassAssociationorthegoverningbodyoftheRecognizedSystem,inaccordancewithitsrules,haspreviouslyapprovedtheprincipleofasponsorshipcontract;and

(b) thedisplayingofsuchsponsor’sAdvertisingisrestrictedtoareasreservedtotheOrganizingAuthorityasdetailedinRegulation20.4andTable1;and

(c) theboatsareonlyrequiredtodisplaysuchsponsor’sAdvertisingateventsatwhichthatWorldSailingClassorthatRecognizedSystemistheOrganizingAuthority,orateventsforwhichthatWorldSailingClassorthatRecognizedSystemhaveexecutedawrittenagreementwiththeOrganizingAuthoritypermittingtheboatstodisplaysuchsponsor’sAdvertising.

TheInternationalClassfulfilledtherequirementsof20.6.1in2011andhavefirstclaimtothebowareaofallOptimistsattheirInternationalClassChampionships

20.6.2 TheNationalClassAssociationofaWorldSailingClassorthenationalgoverningbodyofaRecognizedSystemshallnot,withoutthepriorwrittenconsentofrespectivelytheWorldSailingClassAssociationortheinternationalgoverningbody,enterintoasponsorshipcontractrequiringtheboats todisplayAdvertising.

39