CLASS RULES Effective 8 November, 2019 - Etchells Class

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INTERNATIONALETCHELLSCLASS RULESEffective 8 November, 2019International Etchells Class Rules 2019 Revised November 8, 20191

The Etchells was designed in 1966 by Skip Etchells and was adopted as aninternational class in 1974.International Etchells Class Rules 2019 Revised November 8, 20192

INDEXPART I – ADMINISTRATIONSection A – GeneralA.1 Language .A.2 Abbreviations .A.3 Authorities .A.4 Administration of the Class .A.5 ISAF Rules .A.6 Class Rules Variations .A.7 Class Rules Amendments .A.8 Class Rules Interpretation .A.9 International Class Fee andISAF Building Plaque .A.10 Sail Numbers .A.11 Hull Certification .A.12 Initial Hull Certification .A.13 Validity of Certificate .A.14 Hull Re-Certification .A.15 Retention of CertificationDocumentation .Section B – Boat EligibilityB.1 Class Rules and Certification .B.2 Flotation Check .B.3 Class Association Sticker .444444455555566666PART II – REQUIREMENTS ANDLIMITATIONSSection C – Conditions for RacingC.1 General . 7C.2 Crew . 7C.3 Personal Equipment . 7C.4 Advertising . 7C.5 Portable Equipment . 8C.6 Boat . 9C.7 Hull . 9C.8 Hull Appendages. 10C.9 Rig . 10C.10 Sails . 12Section D– HullD.1 Parts . 14D.2 General .D.3 Hull Shell .D.4 Deck .D.5 Buoyancy Tanks .D.6 Cockpit Sole Floorboards .D.7 Bulkheads .D.8 Thwarts .D.9 Console .D.10 Assembled Hull .Section E – Hull AppendagesE.1 Parts .E.2 General .E.3 Keel .E.4 Rudder Blade, Rudder Stockand Tiller .Section F – RigF.1 Parts .F.2 General .F.3 Mast .F.4 Boom .F.5 Spinnaker Pole .F.6 Standing Rigging .F.7 Running Rigging .Section G – SailsG.1 Parts .G.2 General .G.3 Mainsail .G.4 Headsail .G.5 Spinnaker .PART III – APPENDICESH.1 Sail Acquisition .H.2 Keel Alteration Procedure .H.3 Keel Pre December 1998 .H.4 Measurement Diagrams 335363737International Etchells Class Rules 2019 Revised November 8, 20193

INTRODUCTIONEtchells hulls, hull appendages, rigs and sails are measurement controlled.These rules are deemed to include the Sail Measurement Certificate, MeasurementTemplates and Measurement Diagrams.Etchells hulls, hull appendages and rigs shall only be manufactured by ISAF approvedbuilders– in the class rules referred to as licensed builders. Equipment is required tocomply with the International Etchells Building Specification and is subject to an ISAFapproved manufacturing control system.Etchells hulls, hull appendages, rigs and sails may, after having left the manufacturer,only be altered to the extent permitted in Section C of the class rules.Owners and crews should be aware that compliance with rules in Section C is NOTchecked as part of the certification process.Rules regulating the use of equipment during a race are contained in Section C of theseclass rules, in ERS Part I and in the Racing Rules of Sailing.If these rules do not say you can, then you cannot.International Etchells Class Rules 2019 Revised November 8, 20194

PART I – ADMINISTRATIONSection A – GeneralA.1LANGUAGEA.1.1A.1.2The official language of the class is English and in case of dispute over translation the English text shall prevail.The word “shall” is mandatory and the word “may” is RSA.3AUTHORITIESA.3.1The international authority of the class is the ISAF which shall co-operate withthe IECA in all matters concerning these class rules.Notwithstanding anything contained herein, the certification authority has theauthority to withdraw a certificate and shall do so on the request of the ISAF.A.3.2International Sailing FederationISAF Member National AuthorityInternational Etchells Class AssociationNational Class AssociationEquipment Rules of SailingRacing Rules of SailingA.4ADMINISTRATION OF THE CLASSA.4.1A.4.2ISAF has delegated its administrative functions of the class to MNAs. The MNAmay delegate part or all of its functions, as stated in these class rules, to an NCA.In countries where there is no MNA, or the MNA does not wish to administratethe class, its administrative functions as stated in these class rules shall becarried out by the IECA which may delegate the administration to an NCA.A.5ISAF RULESA.5.1A.5.2These class rules shall be read in conjunction with the ERS.Except where used in headings, when a term is printed in “bold” the definitionin the ERS applies and when a term is printed in “italics” the definition in theRRS applies.A.6CLASS RULES VARIATIONSA.6.1At Class Events – see RRS 89.1(d) – ISAF Regulation 10.5(f) applies. At allother events RRS 87 applies.A.7CLASS RULES AMENDMENTSA.7.1Amendments to these class rules are subject to the approval of the ISAF inaccordance with the ISAF Regulations.International Etchells Class Rules 2019 Revised November 8, 20195

A.8CLASS RULES INTERPRETATIONA.8.1Interpretation of class rules shall be made in accordance with the ISAFRegulations.A.9INTERNATIONAL CLASS FEE AND ISAF BUILDING PLAQUEA.9.1A.9.2The licensed hull builder shall pay the International Class Fee.ISAF shall, after having received the International Class Fee for the hull, sendthe ISAF Building Plaque and a measurement form to the licensed hull builder.A.10SAIL NUMBERSA.10.1 Sail numbers shall be the boats ISAF plaque number.A.11HULL CERTIFICATIONA.11.1 A certificate shall record the following information:(a) Class(b) Certification authority(c) Sail number issued by the certification authority(d) Owner and address(e) Hull identification/CIN(f) Builders details including, hull no, mould no and plug no(g) Date of issue of initial certificate(h) Date of issue of certificate(i) Complete boat weight(j) Mast bury, as per C.9.4 (a) (2)(k) Weight of correctors, if any(l) Location of correctors, if any(m) Signature of owner.A.12INITIAL HULL CERTIFICATIONA.12.1 For a certificate to be issued to a hull not previously certified:(a) Certification control shall be carried out by the official measurer whoshall complete the appropriate documentation.(b) The documentation and certification fee, if required, shall be sent to thecertification authority.(c) Upon receipt of a satisfactorily completed documentation and certificationfee, if required, the certification authority may issue a certificate and if soshall send a copy to the appropriate NCA.A.13VALIDITY OF CERTIFICATEA.13.1 A hull certificate becomes invalid upon:(a) the change to any items recorded on the hull certificate as required underA.11.(b) withdrawal by the certification authority.(c) the issue of a new certificate.International Etchells Class Rules 2019 Revised November 8, 20196

A.14HULL RE-CERTIFICATIONA.14.1 The certification authority may issue a certificate to a previously certifiedhull:(a) when it is invalidated under A.13.1(a) and/or after receipt of the oldcertificate, and certification fee if required.(b) when it is invalidated under A.13.1 (b), at its discretion.(c) in other cases, by application of the procedure in A.12.(d) it shall send a copy to the appropriate NCA.A.15RETENTION OF CERTIFICATION DOCUMENTATIONA.15.1 The certification authority shall:(a) retain the original documentation upon which the current certificate isbased.(b) upon request, transfer this documentation to the new certification authorityif the hull is exported.Section B – Boat EligibilityFor a boat to be eligible for racing, it shall comply with the rules in this section.B.1CLASS RULES AND CERTIFICATIONB.1.1B.1.2The boat shall:(a) be in compliance with the class rules.(b) have a valid hull certificate.The owner/owners shall be a fully paid up member/members of the IECA.B.2FLOTATION CHECKSB.2.1It is the responsibility of the owner to ensure the water tightness of the boat atall times.International Etchells Class Rules 2019 Revised November 8, 20197

PART II – REQUIREMENTS ANDLIMITATIONSThe crew and the boat shall comply with the rules in Part II when racing. In case ofconflict Section C shall prevail.The rules in Part II are closed class rules. Certification control and equipmentinspection shall be carried out in accordance with the ERS except where varied in thisPart.Section C – Conditions for RacingC.1GENERALC.1.1RULES(a) RRS 43 is changed as follows: C.3.2.(b) The ERS Part I – Use of Equipment shall apply.(c) RRS 50.4 shall not apply.(d) RRS 42.3 (b) is changed as follows: see C.2.4(a)(e) RRS 49.1 Crew Position is changed as follow: see C.2.3C.2CREWC.2.1LIMITATIONS(a) The crew shall consist of 3 or 4 persons.(b) Substitutions of crew shall be requested to the Race Committee who shallverify the eligibility and crew weight of the substitute crew. The Jury shallapprove the substitution in writing.(c) For any Etchells class Sanctioned Event as described in Appendix A.3, theboat shall sail with the same number of crew throughout.C.2.2WEIGHTSminimumThe total weight of the crew dressed in light clothing,the minimum being outerwear shorts and t-shirt .C.2.3maximum285 kgHIKING(a) When hiking in the sitting position, no part of the crew’s body between themiddle of the thigh and the feet shall be outboard of the sheerline.(b) When hiking in the lying position, at least one arm and one leg shall becompletely inboard of the sheerline.(c) The use of ONLY the headsail, spinnaker and/or mainsheets and/or asingle safety line attached to the top of the console, held solely in thehands, may be used to assist hiking. The safety line shall be of constantthickness, maximum diameter 10mm. It shall have no knots, loops orInternational Etchells Class Rules 2019 Revised November 8, 20198

splices other than to attach it to the console. When extended outboardperpendicular to the sheerline, it shall extend no more than 300mm fromthe sheerline.(d) No rope, wire, rail, handhold or other special device shall be used by anymember of the crew for the purpose of supporting his weight outboard ofthe sheerline.(e) Hiking straps and stiffeners worn under the thighs are not permitted. Thisamends RRS 49.1.C.2.4BOAT HANDLING(a) Hanging on to the mast or shrouds to promote roll tacking or gybing isprohibited. (This amends RRS 42.3 (b)).C.3PERSONAL EQUIPMENTC.3.1MANDATORY(a) The boat shall be equipped with personal buoyancy for each crew memberto the minimum standard EN 393: 1995 (CE 50 Newtons) in accordancewith ISO standard 12402-5 (Level 50), or USCG Type III, or AUS PFD 1.The personal flotation device shall be readily available and shall have awhistle attached.C.3.2TOTAL WEIGHTThe total weight per person of worn or carried clothing and equipment, includingfootwear and other clothing worn below the knee, shall not exceed 10 kg. Thetotal combined weight carried by the crew shall not exceed 30Kg. This amendsRRS 43.1 (b).C.4ADVERTISINGC.4.1LIMITATIONSIn accordance with ISAF Regulation 20.5.1, no advertising shall be displayedpursuant to ISAF Regulation 20.3.2 (Advertising chosen by the Person in Chargeon hulls, spars and sails).International Etchells Class Rules 2019 Revised November 8, 20199

C.5PORTABLE EQUIPMENTC.5.1FOR USE(a) MANDATORYMinimum(1)Hand pump1(2)Anchor weight3.5kg(3)Anchor chain link size6mm(4)Combined weight anchor and chain5.5kg(5)Anchor line diameter10mm(6)Continuous anchor line length (N.B. Runningrigging does not comply with this rule)45m(7)Buckets with lanyards2(8)Capacity each bucket9.5lt(9)Lanyard length1.5mMaximum9.0kg50m(b) OPTIONAL(1) Electronic or mechanical timing devices(2) Magnetic compass(3) Self contained digital compass – giving no more than direction,tacking prompt and timer(4) Extra hand pumps and/or electric bilge pump system (pump, battery,wiring and switches) weighing no more than 6.0 kgs. in total, with thebattery securely positioned in the port seat locker and easilyremovable.(5) Depth sounder not piercing the hull, to be used ONLY when permittedby a National Authority for races confined to boats of their ownnationality(6) Electronic video recording apparatus(7) VHF RadioC.5.2NOT FOR USE(a) MANDATORY(1) Towing rope minimum 25 m and maximum 30 m continuous lengthof not less than 12 mm. Towing rope must be of a floatable materialand not pre-stretched. (N.B. Running rigging does not comply withthis rule).(2) Two paddles minimum 1200 mm long and with a blade area ofminimum 0.04 m2 .(b) OPTIONAL(1) Mooring lineInternational Etchells Class Rules 2019 Revised November 8, 201910

(2)(3)(4)(5)(6)(7)(8)(9)FlashlightHeaving line and throwing PFD deviceRe-boarding deviceSound signalling deviceFlaresFirst Aid KitKnife.Other safety items including any required by law of the boat’sNational Authority or country.C.6BOATC.6.1COMPLETE BOAT WEIGHTMinimum MaximumThe Complete Boat Weight .1508 kg1565 kgThe Complete Boat Weight shall be taken with the boat in dry condition andready to sail, excluding sails and all portable equipment as listed in C.3 and C.5,but including one set of sheets.C.6.2HULL CORRECTOR WEIGHTS(a) If the Complete Boat Weight as defined in C.6.1 is found to be less than1508kg, corrector weights shall be added as detailed in (b) and (c) below sothat the Complete Boat Weight is no less than 1508kgs.(b) To correct, weight shall be added by:(i) permanently fixing weight in the forward bilge sump, which whencombined with the certified weight of the keel shall not exceed 965kg;and/or(ii) Amidships, above the waterline and working towards the ends of the hulltowards the bulkheads add port and starboard;(1) One 305mm wide strip of 510gm/sq.m glass woven roving andpolyester resin of sufficient length to add the required weight.(2) If the first strip is not adequate, a second 305mm wide strip shall beplaced above, not on, the first strip. The second strip shall be carriedout towards the bulkheads only so far as necessary to add the requiredweight.(3) This added glass and resin weight shall not increase the Glass Hullweight to exceed 400kg.C.7HULLC.7.1MODIFICATIONS, MAINTENANCE AND REPAIR(a) Routine maintenance such as painting and polishing is permitted without remeasurement and re-certification.(b) Grinding, planing, sanding and/or the application of putty fillers andcoatings on the outside of the hull is permitted only for the fairing of localInternational Etchells Class Rules 2019 Revised November 8, 201911

imperfections or to improve the finish on the surface of the hull, providedthat no part of the boat is caused to be outside any measurement tolerances.(c) A block, not exceeding 75mm from the centreline of the boat, may be fittedto the cleat shelf face to assist a crew member to brace themselves andprevent falling or sliding inboard when trimming.(d) Holes not bigger than necessary for the installation of fittings and passage oflines may be made in the deck, bulkheads, knees or thwarts – see D.7.2 (b).C.7.2FITTINGS(a) USE(1) Bulkhead access hole covers with gaskets attached and all wing nutssecurely fastened and drainage plugs shall be kept in place whileracing.(2) The Floorboards shall not be removed while racing.C.8HULL APPENDAGESC.8.1MODIFICATIONS, MAINTENANCE AND REPAIR(a) Hull appendages shall not be altered in any way except as permitted by theseclass rules.(b) Routine maintenance such as cleaning, polishing and repair of minordamage, abrasions and scratches is permitted without re-measurement andre-certification.(c) Grinding, planing, sanding and/or the application of putty fillers andcoatings on the outside of the hull appendages is permitted only for thefairing of local imperfections or to improve the finish on the surface of thehull appendage, provided that no part of the boat is caused to be outside anymeasurement tolerances.(d) If the weight or shape (section or profile) of the keel is altered, outside theallowances in (a) & (b), the keel shall be fully re-measured and a new weightcertificate issued and the boat’s certificate re-issued as necessary. Anychanges shall comply with current rules and templates. The procedure in H2 shall be followed.C.9RIGC.9.1MODIFICATIONS, MAINTENANCE AND REPAIR(a) Unused holes 8mm or less in diameter shall be filled with pop rivets ormachine screws. Unused holes greater than 8mm shall be filled or coveredwith aluminium.C.9.2FITTINGS(a) USE(1) Fore and aft mast chocks may be fitted and used to hold the mast inposition in the partners.(2) Mechanical means, including rams, levers and/or block and tacklearrangements with cleats, shall be permitted to move and hold theInternational Etchells Class Rules 2019 Revised November 8, 201912

(3)position of the mast fore and aft in the partners, provided such systemsattach to the mast and fit entirely below the top of the partners.Mast partner blocks shall be fitted and may be attached either to themast or the mast spar hole. If attached to the mast, they may includea step in their design, which shall be a clearance fit above the raisedside of the mast spar hole when the mast is at rest with no tension onthe standing rigging.C.9.3LIMITATIONS(a) Only one set of spars and standing rigging shall be used during an Etchellsclass Sanctioned Event as described in Appendix A.3.C.9.4MAST(a) DIMENSIONS(1) Distance from mast datum point topoint B at the sheerline in way ofmast(2) Distance from point B to the top of themast stepminimum725 mmmaximum740 mm755 mm785 mm(b) USE(1) The spar shall be stepped in the mast step in such a way that the heelis capable of being moved in a fore and aft direction, except that itshall not be capable of moving more than 2 mm while racing.(2) If a sliding gooseneck is used, a stop shall be fitted to prevent theupper edge of the boom being below the lower point.C.9.5BOOM(a) DIMENSIONSminimum25mmLimit mark widthBoom point distancemaximum3530 mm(b) USE(1) The intersection of the aft edge of the mast spar and the top of theboom spar, each extended as necessary, shall not be below the upperedge of the mast lower limit mark when the boom spar is at 90 tothe mast spar.C.9.6SPINNAKER POLE(a) USE(1) Grip tape or similar may be added to the pole.C.9.7STANDING RIGGING(a) DIMENSIONSInternational Etchells Class Rules 2019 Revised November 8, 201913

Forestay from Forward Datum Pointminimum1290mmmaximum1340 mm(b) USE(1) Shrouds shall be adjusted, only by turnbuckles attached to chainplatesabove the deck.(2) The fore and aft position of shrouds shall not be adjusted while racing.(3) The forestay shall be adjusted only by a below deck turnbuckle attachedto the stem fitting and shall not be adjusted while racing.(4) While sailing downwind with the jib lowered on the deck, the mast maybe steadyed by either:(a) unfastening the halyard from the headsail and attaching it to the tackfitting or to a separate deck eye located aft of the forestay andretensioing the halyard, or,(b) attaching a separate line from the headsail tack fitting or from aseparate deck eye located aft of the forestay to the head of sail orhalyard and then re-tensioning the halyardC.9.8RUNNING RIGGING(a) USE(1) Sheeting arrangements are optional except that no lines may passthrough the hull sides.(2) The lower section of the backstay shall be led around the backstaysheave inside the hull.(3) Halyards shall be led over sheaves or fairleads in the positions asshown on the spar drawings.(4) The kicking strap/boom vang shall be led only to the chainplates,cabin top and/or the mast above the partners.(5) Other running rigging arrangements are optional.C.10SAILSC.10.1 MODIFICATIONS, MAINTENANCE AND REPAIR(a) Sails shall not be altered in any way except as permitted by these class rules.(b) Routine maintenance such as general repairs is permitted without remeasurement and re-certification, provided that no alteration to sail shapeor measurement takes place.C.10.2 LIMITATIONS(a) Not more than 1 mainsail, 2 headsails and 2 spinnakers shall be carriedaboard.(b) Not more than 1 mainsail, 2 headsails and 2 spinnakers shall be presentedfor measurement and used during an Etchells Class Sanctioned Event asdefined in Appendix A.3.International Etchells Class Rules 2019 Revised November 8, 201914

(c) Only one sail of each type shall be hoisted at any one time.C.10.3 ACQUISITION AND REGISTRATION.(a) Sails shall only be acquired by a fully registered boat (A.12) and whoseowner/s is/are a fully paid up member/s of the association for the appropriateyear.(b) A sail is deemed acquired on the date it was first entered on the sailacquisition form. It shall be entered on the sail acquisition form by an IECAapproved sail measurer.(c) Unused sail allocation shall not be carried forward to subsequent years.(d) Sail acquisition rights apply to the boat not the owner.(e) Each boat may acquire in each calendar year, in any manner a total of 6 sailsof any combination of type (mainsail, headsail or spinnaker).(f) The owner may apply for exemption to (e) to replace sails lost, stolen ordestroyed as per the procedure in Section H.(g) The sail category, sail number, date and legible signature of the measurershall be entered on the boat’s sail acquisition form.(h) Sails used in Etchells class racing shall comply with boats acquisition rightsand shall be registered to the boat correctly with sail number and hullnumber matching except as determined and published by the IECA.(i) Sails shall not be borrowed for Etchells class Sanctioned Events as definedin Appendix A.3.(j) Any re-cutting, re-design, alteration or repair shall not deem the sail to be anew sail unless 33.3% or more of the material is replaced.C.10.4 MAINSAIL(a) USE(1) The sail shall be hoisted on a halyard. The arrangement shall permithoisting and lowering of the sail at sea.(2) The highest visible point of the sail, projected at 90 to the mast spar,shall not be set above the lower edge of the mast upper limit mark.The intersection of the leech and the top of the boom spar, eachextended as necessary, shall not be behind the fore side of the boomouter limit mark.(3) Luff and foot bolt ropes shall be in the spar grooves or tracks.C.10.5 HEADSAIL(a) USE(1) The sail shall be hoisted on a halyard. The arrangement shall permithoisting and lowering of the sail at sea.(2) The intersection of the luff or its extension and the deck shall be notmore than 50 mm aft of forestayC.10.6 SPINNAKER(a) USE(1) The sail shall be hoisted on a halyard. The arrangement shall permithoisting and lowering of the sail at sea.International Etchells Class Rules 2019 Revised November 8, 201915

Section D – HullD.1PARTSD.1.1MANDATORY(a) Hull shell(b) Forward ring frame in hulls built on or after 1st January 2008(c) Deck(d) Buoyancy Tanks(e) Bulkheads(f) Thwart(g) Partition aft of seat(h) Knees(i) Rudder skegD.1.2OPTIONAL(a) Console(b) Forward ring frame in hulls built prior to 1st January 2008D.2GENERALD.2.1RULES(a) The hull shall comply with the class rules in force at the time of initialcertification.D.2.2CERTIFICATION(a)See Rule A.12.(b)The builder shall sign the measurement form stating that the hull andhull appendages are built in accordance with the rules, plans and specificationsof the IECA.MODIFICATIONS, MAINTENANCE AND REPAIR(a) The hull shell, deck, bulkheads, floorboards and thwart shall not be alteredin any way except as permitted by these class rules.(b) Holes not bigger than necessary for the installation of fittings and passageof lines may be made in the deck, bulkheads, knees or thwarts.(c) If any hull moulding is repaired in any other way than described in C.7.1,an official measurer shall verify on the certificate that the external shapeis the same as before the repair and that no substantial stiffness, or other,advantage has been gained as a result of the repair. The official measurershall also describe the details of the repair on the certificate.(d) Limited extra reinforcement in way of attachment of fittings to the hull,deck, cuddy, coaming, seat, bulkheads or knees, shall consist of:polyester resin and glass tapes and/or backing plates of metal, wood,filler or any combination of these.D.2.3International Etchells Class Rules 2019 Revised November 8, 201916

Reinforcement shall not exceed the area needed to prevent localcrushing or fracture. It shall not create an additional structural member,nor connect two or more structural components.(e) Open holes are permitted in the knees and/or thwart to allow runningrigging, storage of spinnaker pole and/or paddle and to provide access tothwart storage compartment.OPEN HOLE DIMENSIONSminimumAny hole to any edge of any knee or thwartRunning rigging hole to any edge of any knee orthwart Total area of hole(s) in a single kneeTotal area of hole(s) in forward or aft verticalthwart member .Area of any one hole passing running riggingthrough a knee or thwart (Equivalent to max diameter of 50.5mm)maximum50mm25mm75cm2250 cm2250cm2D.2.4DEFINITIONS(a) HULL DATUM POINTThe Hull Datum Point (HDP) is the vertical tangent to the bow excludingany fittings at the sheerline on the bow centre line.(b) The Aft Datum Point (ADP) is the intersection of the transom and undersideof the hull counter extension.(c) All measurement sections shall be marked permanently by the builder in themouldings.D.2.5IDENTIFICATION(a) The hull shall carry the ISAF Plaque permanently placed near the centrelineof the forward face of the aft bulkhead.(b) The ISAF plaque number shall also be cut into the keelson or moulded intothe glass of the hull in the bilge area.D.2.6BUILDERS(a) The hull shall be built by a builder licensed by ISAF. Applications forbuilding licenses shall be made to ISAF and the premises shall be inspectedby Lloyds Register of Shipping or a similar classification society.(b) All moulds shall be constructed by builders licensed for that purpose andapproved by ISAF. All moulds shall be numbered.(c) Any assembly moulds or construction jigs shall be approved by ISAF.(d) No alterations shall be made to any moulds except that a non-skid surfacemay be incorporated in any place on the deck or seat moulds.International Etchells Class Rules 2019 Revised November 8, 201917

D.3HULL SHELLD.3.1MATERIALS(a) The hull shell shall be built from glass reinforced polyester resin. The useof “S” glass is prohibited.(b) Vinylester resin may be used for the fitting of the rudder skeg and the rudderpost.D.3.2CONSTRUCTION(a) The construction shall be in accordance with the ISAF agreed builder’sspecification.(b) The hull shall have deck stiffeners, hull stringers, skeg, bulkheads, seat andall knees except those in way of the chainplates, installed before the hull isremoved from the mould.(c) The hull shall be fully decked except for the mast spar hole and cockpitopening and have flotation element(s) as per D.5.(d) The deck shall bejoined to the hull either in the mould or in an approved assembly jig.D.3.3MEASUREMENT(a) The shape of the hull shall be controlled by the application of ISAFapproved templates.(b) The clearance between hull and template shall be as per D.10.2. Thesheerline shall lie between the measurement marks scribed on the templates.D.4DECKD.4.1MATERIALS(a) The deck shall be built from glass reinforced polyester resin.D.4.2CONSTRUCTION(a) The construction shall be in accordance with the ISAF agreed builder’sspecification.(b) The mould shall not be modified, except that a non-slip surface may beincorporated in any area of the deck.D.5BUOYANCY TANKSD.5.1CONSTRUCTION(a) Buoyancy equipment shall comprise of fore and aft tanks formed bybulkheads – See D7.D.6COCKPIT SOLE FLOORBOARDSD.6.1MATERIALS(a) The materials of the floorboards are optional.D.6.2CONSTRUCTION(a) The design and construction of the floorboards is optional, except that theyshall be easily removable.(b) The floorboards may be fastened in position at the keelson and at 2 locationson each side.International Etchells Class Rules 2019 Revised November 8, 201918

(c) At each fastening point the hull may be reinforced for an area 75mm x75mm using materials as in D.3.2 (a).(d) The openings between the floorboards and hull may be bridged with flexiblematerials such as tape or mesh.(e) The floorboards may extend to the inside surface of the hull.(f) The floorboards shall contact the hull with not more than five transversemembers;D.7BULKHEADSD.7.1MATERIALS(a) The materials shall be in accordance with the ISAF agreed builder’sspecification.D.7.2CONSTRUCTION(a) The construction shall be in accordance with the ISAF agreed builder’sspecification.(b) Holes in the bulkheads shall be filled, bushed or positively plugged toincrease water tightness. A hole shall be considered filled if the clearancearound the rigging does not exceed 0.5mm. Watertight tubes for rigging areprohibited.(c) Drain plugs are permi

International Etchells Class Rules 2019 Revised November 8, 2019 6 A.8 CLASS RULES INTERPRETATION A.8.1 Interpretation of class rules shall be made in accordance with the ISAF Regulations. A.9 INTERNATIONAL CLASS FEE AND ISAF BUILDING PLAQUE A.9.1 The licensed hull builde

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