Post on 19-Nov-2021
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International Optimist Class Rules
International Optimist Dinghy Associationwww.optiworld.org20192021
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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
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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
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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.
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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.
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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).
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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.
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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)
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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.
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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)
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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.
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3.2.2.7 Astraightedgeplacedanywhereincontactwiththesidepanelandspanningthepanelandsoangledthatitliesascloseaspossibletothepanelshallnowherebemorethan5mmfromthesurfaceofthepanel.
3.2.2.8 Astraightedge300mmlongplacedanywhereonthebottompanelparalleltotheforeandaftcentrelineoftheboatshallnowherebemorethan4mmfromthesurfaceofthebottompanel.Nohollowsareallowed.Astraightedge150mmlong,placedinthesameway,shallnowherebemorethan2mmfromthebottompanel.
OnGRPhullsonly,forthepurposeofthisandother‘panelflatnessmeasurements’theextentofthepanelswillbelimitedbyanedgezone,definedbythe‘StandardizedEdge-Edge-ZoneFinder’.
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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)
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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%.
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• Forthepurposeofbuildingefficiency,overlappingof1mat,wovenclothorbiaxialispermittedwithin50mmfromanycorner.Overlapping,ifany,shallbeappliedoverthefulllengthalongeachcorner.
• Anylaminateshallonlyhaveonemouldside,whichshallbesmooth.
• Mouldedpatternsarenotpermittedexceptforanoptionalanti-slippatternnotexceeding1mmthicknessatthegunwaleaftofthemidshipframe.
• Theupper300matofthebottomlaminateshalloverlapthe300matusedinthemaststepbasetoensureastrongbondbetweenhullandmaststep.
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Forthepurposeofpositioningandfixing,thetopofthedaggerboardcase,theflangesofthemidshipframe-daggerboardcaseassemblyandtheflangesofthemastthwartbulkheadshallconsistofmin3x450/max5x450mat(min3mm/max8mmthickness).Atthistopandtheseflanges,thedistributionofglasscontentandthethicknessofthelaminateneednotbeuniformthroughout.
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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.
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(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.
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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.
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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.
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WOOD:
EPOXY:
Manufacturersshall,uponrequest,supplyalaminatedsampleandspecificationsofallmaterialsused.
3.3.1.2 Non-metallicreinforcement(bushing)ofdiameternotmorethan20mmmaybeusedaroundholes,screws,rivetsorbolts.
3.3.1.3 LaminatespecificationforEPOXYdaggerboard:
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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.
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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.
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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.
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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
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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.
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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).
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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.
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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.
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(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.
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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.
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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.
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6.3.3.12 Thereshallbe8eyeletsinthefootofthesail,includingthoseatthetackandclew.Thereshallbe8eyeletsintheluffofthesail,includingthoseatthethroatandtack.(SeealsoCR6.4forspacingbetweeneyeletsinluffandfoot.)
6.4 Dimensions
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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.
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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.
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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.
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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.
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(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.
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(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
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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.
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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.
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