ILCA Class Rules - One Design
One of the attractions of the ILCA Class for most owners is that the class rules are very strict and that the boat
is one design. The Class philosophy incorporated in the rules is that we want to go sailing, not waste time
fiddling with boats. We want to win races on the water using our skill, not by trying to find a way round the rulesthat will give us an advantage.
The class rules are written to prevent any changes from the manufactured boat that might affect performance,
so that on the water each boat is the same. The few changes to the standard boat that are allowed are minor
and only to allow for a few options that make racing the ILCA more comfortable and enjoyable.
Over the years the class has refused to make changes to the rules that allow more expensive or complicatedequipment or which makes older boats redundant.
If you feel you want to change something on an ILCA Class boat - STOP. Ask yourself why you want to doit? If the answer is “to make me go faster” there is a very good chance the modification or addition is illegal!
Take a look at the Class Rules.
•
Part One explains the Fundamental Class Rule which covers the philosophy and any item notspecifically written into the rules.
•
Part Two tells you what you must do to have a legal boat.
•

Part Three details a few optional changes and additions you can make.

If Part Three does not specifically allow a change or addition - IT IS ILLEGAL!
If you race a Class boat that has a change or addition not allowed by the class rules you will be disqualified
from the race. Ignorance of the rules is no defence.

Cheating

In our sport in every club and class there is the odd person who needs to cheat to win. Cheating is doing
something that you know is against the rules. Whether you gain an advantage or not is irrelevant.
Our class is strong and popular because we believe in a strict one design and our sailors want to know thatthey are racing on equal terms. ILCA takes a very strong line with competitors who do not sail according to
the Class rules. There have been cases in the past where sailors who have sailed with illegal boats have beenbanned from competing in ILCA Class events. Such a ban can be for life. If action is also taken under the
racing rules, the ban can cover racing in any boat.
Our class is much bigger than the odd person who wants to gain advantage by illegally changing the ILCA or
its equipment. They can sail in other classes where the rules allow changes to a boat to get an advantage.
We do not want them with us.

Class Rules Index
PART ONE
Object..........................................28
Fundamental Rule.......................28
Hull Identification.........................28
Definition of a Builder..................28
PART TWO
1. Measurement Diagrams........28
2. Measurement........................28
3. Control Systems,
Control Lines and Fittings......28
4. Sail Registration Numbers,
National Letters & Flag..........30
5. Mast.......................................31
6. Clothing and Equipment........31
7. Sailing Requirements............32

8. Hull Coatings.........................32
9. Class Association
Membership...........................32
10. Advertising.............................32
PART THREE:
11. Hull Finish..............................32
12. Transom Drain Bung.............32
13. Self Bailer..............................32
14. Centreboard..........................32
15. Rudder...................................32
16. Tiller.......................................33
17. Hiking Strap...........................33
18. Boom.....................................33
19. Mast.......................................33
20. Inspection Ports.....................34

27

21. Clips & Storage Bags............34
22. Compass...............................34
23. Wind Indicators......................34
24. Tape and Line........................34
25. Safety Equipment..................34
26. Repairs & Maintenance.........34
27. Reefing..................................34
28. Boat or Body
Mounted Camera...................34
PART FOUR
29. ILCA 6....................................34
30. ILCA 4....................................35
PART FIVE
31. Amendments.........................35

The latest edition of the ILCA Class Rules and By-Laws are either the sail number or a unique production number.
available at www.laserinternational.org.
Boats with sail numbers from 148200 shall display a unique
World Sailing Building Plaque that has been purchased by thebuilder from the International Laser Class Association. The
plaque shall display the sail number of the boat issued by theInternational Laser Class Association and shall be permanently
Valid from 1st January 2023. Cancels all previous rules and fixed in the rear of the cockpit by the builder.
interpretations.
SAIL IDENTIFICATIONRECENT CHANGES:
Sails manufactured after 1 January 2001 shall have attached
1 January 2023
near the tack of the sail an ILCA authorized sailmaker button
Rule 24 modified to allow heat shrink tube.
purchased from the International Laser Class Association. ILCA
1 January 2020
7 MKII sails shall have orange buttons and ILCA 6, ILCA 4 andDefinition of Builder modified. Other class rules affected ILCA 7 MKI (cross-cut) sails shall have red buttons.
by this rule change were modified to be consistent with the DEFINITION OF BUILDER
amended definition of Builder.
A Builder is a manufacturer that is manufacturing the hull,
1 January 2019equipment, fittings, spars, sails and battens in strict adherencePart One modified to clarify that all sails used in competition to the Construction Manual, and has been approved as ashall have an ILCA supplied sail button to be class legal. Builder by each of World Sailing and the International Laser(previous interpretation.)
Class Association.
Rule 3(b)i modified to remove the restriction on the use ofPART TWO
aramid fibre rope for control lines. (previous interpretation)
Rule 3(b)ii modified to allow for local variation in thickness 1.		 MEASUREMENT DIAGRAMS
of control lines that is not specifically restricted to tapering. The Measurement Diagrams are part of these Rules.
(previous interpretation)
The spars, sails, battens, centreboard, rudder, and the placing
Rule 3(b)vi modified to enable clam cleats to include a of fittings and equipment shall conform to the Measurement
through hole attachment point. (previous interpretation)
Diagrams. The measurement tolerances are intended to allow
Rule 19(a) modified to clarify that mast step abrasion tubes for necessary manufacturing tolerances and shall not be used toor collars may be in separate pieces. (previous interpretation) alter the design.
Rule 31 modified to shorten the rule voting process from six 2.		 MEASUREMENT
months to one month and removing "votes to be sent by
In the case of a dispute alleging non-compliance with thepost".
Construction Manual, the matter, together with any relevant
1 January 2017
information, shall be referred to the Chief Measurer of theRule 22 Compasses, Electronic Equipment and Timing International Laser Class Association at the International Office
Devices modified to allow use of digital compasses that are who shall give a final ruling in consultation with a World Sailing
not GPS enabled.
Technical Officer.
New Rule 28 Added to allow boat or body mounted cameras. In the case of a measurement dispute on the hull, spars, sail,
Rule 3(f)vi modifed to remove restriction on the attachment battens, centreboard and rudder, rigging, type of fittings andpoints of the shock cord inhaul.
equipment and the placing of same not explicitly covered
Rule 17(c) modified to allow for the addition of one cleat and by these Rules, Measurement Diagrams and Measurement
one turning point in the hiking strap support line that are not By-Laws the following procedure shall be adopted:
attached to the hull or hiking strap.
A sample of 10 other boats shall be taken and measured
using identical techniques. The dimensions of the disputed
INTRODUCTION
boat shall be equal to, or between the maximum and minimum
The principle of the ILCA Class Rules is that no changes dimensions obtained from these 10 boats. If the boat in question
to the boat are allowed unless they are specifically is outside these dimensions the matter, together with any
permitted by the class rules.
relevant information, shall be referred to the Chief Measurer of
The English text of the ILCA Class Rules shall govern.
the International Laser Class Association at the International
Office, who shall give a final ruling. If any of the dimensions of
the sample are considered to be unusual, all relevant information
OBJECT
shall be referred by the Class Association to World Sailing.
The boat is a strict one-design dinghy where the true test, 3. 		 CONTROL SYSTEMS, CONTROL LINES AND
when raced, is between helmspersons and not boats and
FITTINGS
equipment.
(a)		 Control System Definitions
FUNDAMENTAL RULE
i The Cunningham, outhaul, vang, traveller and mainsheet
The boat shall be raced in accordance with these
are the Control Line Systems. The cunningham, outhaul
Rules, with only the hull, equipment, fittings, spars,and vang Control Line Systems may include more thansail and battens manufactured by a World Sailingone Control Line as allowed in Rules 3(d)i, 3(e)i and 3(f)and International Laser Class Association (ILCA)
i. Each Control Line shall be a single piece of uniform
approved builder in strict adherence to the boat design
thickness and material. A line is a Control Line if any
specification (known as the Construction Manual) whichof the line moves along its axis during adjustment of theis registered with World Sailing.
Control Line System. A line that exclusively attaches
No addition or alteration may be made to the hull form,
items together is a Tie Line.
construction, equipment, type of equipment, placing ofii For the purpose of these definitions, the Standard Fittingsequipment, fittings, type of fittings, placing of fittings,
spars, sail and battens as supplied by the builder
are the:except when such an alteration or change is specifically
Plastic cunningham fairlead
Vang cleat block
authorised by Parts 2 or 3 of these Rules.
Plastic cunningham clam cleat Vang key block
HULL IDENTIFICATION
Plastic outhaul clam cleat
Vang key
All boats shall have an identification number moulded into the
Plastic outhaul fairlead
Plastic traveller clam cleat
deck under the bow eye or into the transom, which shall be
Plastic traveller fairleads
Mainsheet block

ILCA By-Law 1: Rules(Parts one to five inclusive)

PART ONE© ILCA 			

28

Valid from 1st January 2023

iii An “Optional” fitting is a fitting or block that replaces,in the same position witha “Builder Supplied” deck
or is additional to, a Standard Fitting as allowed bycleat base for attachingthese Rules.
two “Optional” camiv A “Builder Supplied” fitting replaces a Standard
cleats (cunningham andFitting, and is supplied only by the Builder, as
outhaul) which have fixing
allowed by these Rules.
hole centres of 27 mm.
v A “Turning Point” is a sheave (pulley) in a block, a
The two cam cleats may include a bridge and arope loop, a rope loop reinforced with a thimble, thefairlead with or without rollers on the aft exit.
outhaul fairlead, a shackle, part of a fitting, sail cringle,d) Control lines shall not be tied to any of themast or boom around which a moving Control
cunningham fairlead, the “Builder Supplied” deckLine passes, except that the cunningham fairlead,
block fitting and the “Optional” blocks attached
the “Optional” blocks attached to the “Builder
to it, the cunningham clam cleat or the “Builder
Supplied” deck block fitting, the cunningham clam
Supplied” deck cleat base and the “Optional” camcleat, and the “Optional” cam cleats attached tocleats, cleat bridge and fairleads attached to it.
the “Builder Supplied” deck cleat base will not be
ix. Rope loop handles covered with plastic/rubber tube
counted as “Turning Points” in Rules 3(e)i and 3(f)i.
and/or tape may be included anywhere on the freevi When an “Optional” block, or shock cord is
end of a control line.
attached to a fitting, line, mast, boom or the sail, it
x. The free ends of different control lines (except
may be attached either with or without a shackle,
mainsheet) may be tied together and/or tied to any
clips, balls, hooks and/or a tie line.
deck fitting or the centreboard, the centreboard(b)		 Control Lines and Fittings
handle or a rope loop used to attach a retaining line.
i. Control lines shall be natural or synthetic rope.
Free ends of control lines shall not be tied to shockii. Control lines shall be ofcord (except mainsheet).
uniform thickness, but
xi. To secure the mast in the event of a capsize, a
may vary in thickness forloose retention line or shock cord (that will allow 180
the purpose of a splicedegree plus mast rotation) shall be tied/attachedat the load bearing
between the cunningham fairlead or the deck blockattachment point.
fitting and the mast tang or gooseneck. Clips,iii. In a control line system where more than one control
hooks, shackles and balls may be used to attach theline is permitted, lines of different diameter shall notretention line.
be joined together.
xii Reference points (marks) may be placed on theiv. “Optional” blocks allowed in cunningham, vangdeck, spars and ropes.
or outhaul control systems, shall have sheaves of (c)		 Mainsheet – also see Rules 3(a) & 3(b)diameter not less than 15 mm and not more than 30
i. The mainsheet shall be a single line, and bemm.
attached to the becket of the aft boom block, and		 Thimbles allowed to reinforce rope loops used asthen passed through the traveller block, the aft boom
“Turning Points” in the cunningham, vang and outhaul
block, boom eye strap, forward boom block and thecontrol line systems shall not exceed 40mm in length.
mainsheet block. After the mainsheet block it shallv. Only single or double “Optional” blocks shall bebe knotted, or tied, so that the end of the mainsheet
used. A single block means a block with one sheave;
cannot pull through the mainsheet block. The
a double block means a block with two sheaves.
mainsheet shall not be controlled aft of the forward“Optional” blocks may include a becket, a swivel and/boom block except to facilitate a tack or gybe.
or a shackle.
ii. The tail of the mainsheet may also be knotted or tiedvi. The fairleads and clam cleats may
to either the base of the mainsheet block, the hiking
be replaced in the same position
strap, the hiking strap support line, or the hiking strap
with an identical size and shape
shock cord. This option, if used, satisfies the knotting
fitting. Clam cleats may include arequirement in 3(c)i.
through hole attachment point.
iii. The mainsheet block may be replaced by any typevii. The plastic cunningham fairlead may be replacedof single block with or without an internal or attachedwith one of the same type which has a stainless steel
jamming device, and mounted in the position shown
insert, and has the same screw hole positions.
on the measurement diagram. The block may besupported by a spring, ball, plastic tube or tape.
viii. “Builder Supplied” Deck Fittings (Deck Block Fitting
and Deck Cleat Base)iv. One mainsheet clam or cam cleat of any type may
be mounted on each side deck in the position showna) The cunningham fairleadon the measurement diagram.
may be replaced in thesame position with a “Builder(d)		 Vang – also see Rules 3(a) & 3(b)Supplied” deck block fittingi. The vang system shall be between the mast tangwhich may have one or two
and the boom key fitting and shall be comprised ofsingle “Optional” blocks
the vang cleat block, the vang key block, a maximum
attached.
of two control lines, loops and/or “Optional” blocks
for additional purchase with a maximum of 7
		 “Optional” blocks shall not be attached to the“Turning Points”.
cunningham fairlead.
ii. The vang cleat block shall be attached directly to the		 Either the cunningham fairlead alone, or themast tang, or to an “Optional” swivel that shall be“Builder Supplied” deck block fitting with single
attached to the mast tang.
“Optional” block(s) attached may be used to leadthe cunningham and/or outhaul control lines toiii. A shackle may be used to attach the vang cleat blockthe deck cleat(s)or the swivel to the mast tang.
b) The “Optional deck blocks may be supported with
iv. The swivel, shackle or swivel/shackle combinationa spring, ball, plastic tube or tape.
shall not exceed 80 mm in length when measured
under tension.
c) The cunningham clam cleat may be replaced© ILCA 			

29

Valid from 1st January 2023

v. The vang key block may be fitted with a spare key.
vi. The key may be straight or bent, and it may be heldin the key way with either tape, elastic or velcro.
vii. The vang key block may be replaced with an“Optional” vang key block which may have a sparekey.
viii.“Optional “single blocks may be attached to one orboth sides of the vang cleat block, using a clevis pin
or bolt through the attachment hole in the vang cleat
block.
ix. The mast tang hole may be drilled to take a largerpin.
x. “Builder Supplied” Vang Cleating Fittinga) The vang cleat block may be replaced with a“Builder Supplied” vang cleating fitting which
incorporates “Turning Points” and a cam cleat.
These photos show the 2 Class legal “Builder
Supplied” vang cleating fittings:b) The fitting shall be attached directly to themast tang.
c) The fitting shall not be modified in any way.
(e)		 Cunningham – also see Rules 3(a) & 3(b)i. The cunningham system shall consist of a
maximum three control lines, “Optional” blocks orloops for purchase with a maximum of 5 “Turning
Points”.
ii. The cunningham control line shall be securely
attached to any of the mast, gooseneck, mast tang,swivel or shackle that may be used to attach thevang cleat block to the mast tang, the cunningham
attachment point on the “Builder Supplied” vang
cleating fitting or the becket of an optional becket
block fixed on the cunningham attachment point on
the 'Builder-supplied' vang.
		 The cunningham control line shall pass through thesail tack cringle as a moving line.
		 The sail tack cringle shall be at least one of the
maximum of 5 “Turning Points” permitted byRule 3(e)i.
iii. Additional purchases may be obtained using rope
loops, “Optional” blocks and using any of the boom,
sail tack cringle, gooseneck fitting, mast tang,shackle attaching vang cleat block or swivel, theswivel, or the cunningham attachment point on a
“Builder Supplied” vang cleating fitting.
iv. Deck Block Fitting and Deck Cleat Base		 The cunningham control line shall pass only once
through the cunningham fairlead or “Optional”
single block attached to the “Builder Supplied” deck
block fitting and shall pass only once through thecunningham clam cleat or “Optional” cam cleat
attached to the “Builder Supplied” deck cleat base.
(f)		 Outhaul – also see Rules 3(a) & 3(b)i. The outhaul system shall consist of a maximumof two control lines, “Optional” blocks or loops forpurchase and a maximum of 6 “Turning Points”.
ii. The outhaul control line shall be attached to either
the end of the boom, the outhaul fairlead, the sail, ora quick release system, and shall pass through theboom outhaul fairlead as a moving line at least once

© ILCA 					The outhaul fairlead shall be at least one of the
maximum of 6 “Turning Points” permitted byRule 3(f)i.
iii. Additional purchases may be obtained by forming
rope loops in the line or adding “Optional” blocks
to the line, and/or using the outhaul fairlead,the outhaul clam cleat, the boom, the mast or
gooseneck fitting.
		 An “Optional’ block may be attached to the outhaul
fairlead, provided Rule 3(f)ii is also satisfied.
		 An “Optional” block may be attached to the outhaulclam cleat.
iv. An “Optional” block may be attached to the clew ofthe sail, or to a quick release system, or be part of aquick release system.
v. One or two “Optional” blocks may be attached to
the gooseneck fitting, or at the mast/gooseneck
junction with their “Turning Points” not more than
100mm from the centre of the gooseneck bolt. (Thegooseneck may be inverted.) The blocks in thisrule may also be attached to the gooseneck with abolt or a pin.
vi. A shock cord may be used as an inhaul on the clew
vii. Shock cord and/or rope loops (rope loops may bepart of the control line) can be tied around the boom
and/or the outhaul control lines to retain the outhaullines close to the boom.
viii.Deck Led Outhaul Systema) When led to the deck, the outhaul control line
shall pass only once through the cunningham
fairlead or the outhaul “Optional” single blockattached to the “Builder Supplied” deck block
fitting and shall pass only once through the“Optional” cam cleat attached to the “Builder
Supplied” deck cleat base.
b) The boom outhaul clam cleat shall not be
removed.
(g)		 Clew Tie Down – also see Rules 3(a) & 3(b)i. The clew of the sail shall be attached to the boomby either a tie line or a
webbing strap with orwithout a fastening device
wrapped around the boom
and through the sail cringle,
a quick release system
attached to a tie line orsoft strap wrapped aroundthe boom, or a "Builder
Supplied" stainless steel boom slide with quick
release system. An additional outhaul extension tie
line may be added between the clew of the sail andthe outhaul or the quick release system.
ii. If the clew tie down is a tie line, it may be passed
through solid balls with holes and/or tubes to reduce
friction.
(h)		 Traveller – also see Rules 3(a) & 3(b)i. The traveller shall be a single line. It shall be rigged
as a simple closed loop through the traveller eyes
and the free end passing through the traveller cleat.
A splice that does not extend through the nearest
traveller eye may be used at the non-free end.
ii. A spring, ball or tape may be used between thetraveller blocks.
4.		 SAIL REGISTRATION NUMBERS, NATIONALLETTERS AND NATIONAL FLAG		 (For ILCA 6 and ILCA 4 sail number positions
please see part 4 rule 29(e) and 30(e)(a)		 For boats up to sail number 148199, the sailnumber is a number moulded into the deck underthe bow eye or into the transom, or displayed on a30

Valid from 1st January 2023

plate attached to the rear of the cockpit.
For boats with sail numbers from 148200, the sailnumber is the number displayed on a unique World
Sailing Building Plaque attached to the rear of the
cockpit.
(b)		 All numbers shall be in accordance with the Racing
Rules of Sailing except as amended by theserules in respect of type, positioning and minimum
dimensions:
		 Height 300 mm.
		 Width 200 mm (excluding digit 1).
		 Thickness 45 mm.
		 Space between adjoining numbers minimum 50 mm.
		 Sail numbers shall be regularly spaced.
		 Numbers on the starboard side shall be placed
above those on the port side.
		 Each sail number digit shall be of one colour only.
		 The sail numbers shall be solid and easy to read.
		 After 1st March 1998 - sail numbers and national
letters shall only be adhesive numbers. The use ofpermanent ink pens or similar to mark numbers andnational letters on the sail is prohibited.
(c)		 For sails with numbers above 153000 and sails
purchased after 1st June 1993 the sail numbers
shall be glued or sewn on each side of the sail, withthe bottom of the numbers on the starboard side of
the sail placed along a line parallel to and 400 mm(+ or - 12 mm) below the seam at the middle batten
pocket. The bottom of the numbers on the port sideof the sail shall be placed on a line 400 mm (+ or - 12mm) below and parallel to the bottom of the numberson the starboard side of the sail. The starboard sailnumbers shall commence 100 mm (+ or - 12 mm)from the leech and the port side numbers shall end
100 mm (+ or - 12 mm) from the leech.
		 (For additional guidance, see the Instructions
for Applying Sail Numbers on p. 45 along withaccompanying diagrams on pp. 52 - 55).
(d) Sail numbers from 131000, sails purchased after 1st
June 1993 and new sails stamped “New Numbers”
shall have numbers that are clearly visible with thelast four digits of the number in one dark, distinctive
colour or black and any preceding numbers in adifferent, contrasting, distinctive colour (red isrecommended).
(e)
Exceptions to this Rule are permitted:
i. when the hull and/or sail are provided by theorganisers for an event and after approval of theInternational Laser Class Association, the numberson the sail used for that event only may be single,
double or triple digit numbers.
ii. in the case of a boat borrowed or chartered fora specific event, and after written approval fromthe Race Committee, a competitor may use a sailwith numbers that are different to the sail number
allocated to the hull. The sail number used shall be
the sail number allocated to the competitor’s own
boat. When the competitor does not own a boat, thenumber used on the sail shall be the number of theboat chartered.
iii. when a sail is damaged during a series and Rule 7(c) applies the sail number may contravene Rules 4(a) and (e) ii only when written permission for a sailnumber change is given by the Race Committee.
(f)National Letters, if required, shall conform to thesame type, size, spacing and requirements as sailnumbers (refer rule 4(b), (c), (d) and (e)) and shall bepositioned as follows:		© ILCA 			The letters on the starboard side of the MKI sail shallbe placed along the top edge of the seam below
the bottom batten pocket (+ or - 12mm), for the
MKII sail on a Base Line 400mm (+ or - 12mm)
below the bottom batten pocket and on the portside of the sail along a line 400 mm (+ or – 12mm)
below and parallel to the letters on the starboard
side. The starboard letters shall commence 100 mm(+ or - 12 mm) from the leech and the port lettersshall finish 100 mm (+ or - 12 mm) from the leech.
The letters shall all be the same colour, which may
be one of the colours of the digits of the sail number,or another distinctive colour [also see diagrams on
pages 52-55].
		 National Letters shall be required at all WorldChampionships, Regional Championships andevents described as international events in thenotice of race or sailing instructions. National
Letters may be required at any other regatta by thenotice of race or sailing instructions.
(g) RED RHOMBUS
i.		Sails used in the following women’s events shallcarry a red rhombus above the top batten pocket on
both sides;
		 a. World or regional (continental) championships.
		 b. Events described as “international events”
by the Notice of Race or Sailing Instructions.
		 c. Other events that prescribe in the Notice of Raceor Sailing Instructions that women competitors
should be identified.
ii. The minimum size and approximate position shallcomply with diagram on page 36.
iii. The rhombus may be retained for racing in otherevents.
(h) NATIONAL FLAG		 If required by the Notice of Race and the Sailing
Instructions, a national flag with a nominal size of
567 x 337 mm shall be applied to both sides of themainsail. For the ILCA 7 and ILCA 6 sails, flags shallbe positioned such that the aft edge of the flag is
within 100 and 150 mm of the leech and between thesail numbers and the batten pocket below the sailnumbers. The flag shall be approximately parallelwith the sail numbers and letters and shall not touchthe numbers. For the ILCA 4 sail, the flag shall bepositioned within 100 and 150 mm of the leech but
below and within 50 mm of the bottom batten pocket.
The flag shall be printed on separate material
applied to the sail. The use of permanent ink pensor similar to make a national flag is forbidden. The
national flag shall correspond to the national letters.
5.		 MAST
No mast which has a permanent bend shall be used at any
time.
6.		 CLOTHING AND EQUIPMENT(a)
For the purposes of RRS 50.1 (b) the maximum total
weight of competitors’ clothing and equipment shallbe 9kg (for ILCA 6 and ILCA 4 rigs please see part4).
(b) Competitors shall not wear or carry non floating
clothing or equipment which in total weight exceeds
500 grammes dead weight except protective sailingclothing.
(c)
For the purposes of weighing clothing and equipment
as required by RRS Appendix H three coat hangers
may be used instead of a rack.
7.		 SAILING REQUIREMENTS(a)
The boat shall be raced with either one or two
persons aboard.

31

Valid from 1st January 2023

		

When two persons race a boat they shall race
together throughout the entire race or series of races
without alternating at the helm.
(b) No part of the helmsman or crew may be placed
forward of the mast while racing.
(c)
Sails
		 In a series of races a sail shall not be changed foranother unless written permission for an individualchange is obtained from the race committee. Written
permission shall only be given in the event ofa sail damaged beyond repair or damaged to theextent that it cannot be repaired before the start of
the next race in a series. In the event of a change
the damaged sail shall not be used again in that
series even if it is subsequently repaired.
		 For the purpose of this rule, a series is deemed to be
two or more individual races which count towards an
overall points total.
8.		 HULL COATINGSThe use of slowly soluble applications which might alter theboundary layer characteristics of the hull are prohibited.
9.		 CLASS ASSOCIATION MEMBERSHIPNo person is permitted to race in any Fleet, interFleet,District, or other sanctioned event unless at least one
member of the crew is a current member of theInternational Laser Class Association (a member of aDistrict ILCA Association duly established in accordancewith the Constitution is a member of the International Laser
Class Association).
10.		ADVERTISING
Advertising, including competitor advertising, is permitted inaccordance with World Sailing Regulation 20 - Advertisingcode; except that the sail window shall be kept free ofadvertising or other graphic material.
[Note: For information about World Sailing Regulation 20, see:
http://www.sailing.org/documents/regulations/regulations.php]

PART THREE

11.
(a)		

OPTIONS & EXCEPTIONSTO PARTS ONE & TWO

HULL FINISH
Waxing, polishing and fine wet and dry sanding of
the hull is permitted, provided the intention and effectis to polish the hull only. Polishing/sanding shall not
be used to remove mould imperfections.
(b)		 Sanding and refinishing of the hull with theintention or effect to lighten the hull or improve theperformance, finish, materials or shape beyond theoriginal is not permitted.
12. TRANSOM DRAIN BUNG
A retaining line may be attached to the transom drain bungand the gudgeon.
13. SELF BAILER
A self-bailing device as supplied only by the builder may be
added. The bailer may be sealed with tape, filler or glue
along its edge where it joins the hull and at the screw hole.
Filling the screw hole level with the flat surface of the bailer
is permitted. Fairing the flat surface of the bailer to the hullshape or changing the profile of the bailer is not permitted.
The drain bung may be removed from the self-bailer, andthe self bailer opening pin may be secured to the cockpit
floor with self adhesive plastic tape. The builder-suppliedo-rings may be substituted with non builder-suppliedalternatives provided the basic function of the bailer isunchanged.
14. CENTREBOARD(a)
A rope handle passing through not more than twoholes of maximum diameter 12.5 mm above a line

© ILCA 			32

		

drawn from the bottom of the centreboard stop,
parallel to the top of the centreboard is permitted. A
plastic/rubber tube and/or tape are permitted on thehandle of the centreboard.
(b) The trailing edge of the centreboard may be
sharpened by sanding the blade between the
trailing edge and a line 100 mm parallel to thetrailing edge, provided the distance between theleading edge and the trailing edge of the blade is
not reduced.
(c)
Surface refinishing of the centreboard is permitted
provided the original shape, thickness andcharacteristics are not altered.
(d) One layer of any material of maximum 2mm
thickness and of a maximum size of 30mm x
30mm may be applied at the top front corner ofthe centreboard case. Vertical cuts are allowed in
the material to allow the material to conform to theshape of the centreboard case.
(e)
A wood centreboard shall not be used on a hullthat was originally supplied with a non woodcentreboard.
(f)
A tie line or shock cord shall be attached to thesmall hole in the upper forward corner of thecentreboard, and any of the bow eye, thecunningham fairlead, the “Builder Supplied” deck
block fitting and the mast to prevent loss of thecentreboard in event of a capsize. The tie line orshock cord may be looped around the bow, but shallnot be attached to the gunwale. Attachment can beby knots or loops in the shock cord, and/or tie lines,
shackles, clips, hooks or eyes. When the shock
cord is attached to the bow eye it may also passthrough an attachment to the “Builder Supplied”
deck block fitting or the cunningham fairlead.
(g)		 The components of the "Builder Supplied"centreboard stopper may be secured together byglue, screws, bolts, nuts and washers, provided theoriginal shape and dimensions are not reduced.
15. RUDDER(a)
The trailing edge of the rudder blade may be
sharpened by sanding the blade between the
trailing edge and a line 60 mm parallel to the trailingedge, provided the distance between the leadingedge and the trailing edge of the blade is not
reduced.
(b) Surface refinishing of the rudder blade is permitted
provided that the original shape, thickness andcharacteristics are not altered.
(c)
The rudder blade and/or rudder head holes may beenlarged up to a maximum diameter of 10mm. The
rudder bolt and bush set may be replaced with alarger diameter bolt to fit this hole. The bolt head,nut and washers shall fall within a 20mm diametercircle.
(d) To achieve the maximum 78 degree rudder angle
relative to the bottom edge of the rudder head, theleading edge of the blade may be cut away where it
touches the spacing pin.
(e)
To restrict the rudder angle to maximum 78 degrees
relative to the bottom edge of the rudder head,
the lower forward spacing pin may be wound withflexible adhesive tape.
(f)		 The rudder pintles may be fitted with spacers to lift
the rudder head to allow the tiller to clear the deckat the transom.
(g) The rudder downhaul line may have multiple
purchases.
(h)		 A hole may be drilled in the top rudder pintle and apin or clip inserted in the hole to prevent loss of therudder.

Valid from 1st January 2023

(i)A wood rudder shall not be used on a hull that was
originally supplied with a non wood rudder.
(j)		 The rudder shall be maintained in the full down
position except whilst racing in water less than
1.5m deep unless otherwise specified in the sailinginstructions.
(k)		 Padding of uniform thickness may be used in the
gap between the rudder blade and rudder head. This
padding must cover completely the part of the rudder
blade that comes in contact with the rudder head.
The thickness of the rudder blade plus the padding
must not exceed 20.3mm.
16.		TILLER(a)
The tiller and tiller extension are not restricted in any
way except that the tiller:
i. shall be capable of being removed from the rudder
head.
ii. shall be fitted with a cleat, hook, pin or eye to secure
the downhaul.
iii. shall, except for normal wear caused by the travellerrope, be straight along its topmost edge between apoint 30 mm in front of the forward edge of the rudder
head and the cockpit end of the tiller.
(b) The tiller may be fitted with an “anti wear” strip or
tube of not more than 200 mm in length placed above
the level of the straight edge required by 16 (a) iii andonly where the traveller crosses the tiller.
(c)
The use of a tiller retaining pin is optional.
17. HIKING STRAP(a)		 The hiking strap may be substituted with any type of
non-stretch material and it may be padded.
(b)		 The hiking strap may be fixed to the cockpit at
the forward end by wrapping the strap around themainsheet block plastic pressure plate or by using
both the centreboard friction attachment plate andthe mainsheet block plastic pressure plate.
(c)		 The hiking strap supporting line between the aftend of the hiking strap and the eye straps on the aftface of the cockpit may be rigged in any manner sothat the hiking strap is fixed or adjustable and may
include one cleat; one ring, thimble, or shackle; orboth.
(d)		 A shock cord may be attached between the aft end of
the hiking strap and to either the traveller cleat, or thehiking strap eye straps at the aft end of the cockpit.

18.		BOOM(a)
A metal sleeve supplied by the builder of maximum
length 900 mm may be fixed inside the boom. The
sleeve shall not extend aft of the point 1220 mmfrom the front end of the boom (including plug).
(b) The stainless steel mainsheet eye strap between
the two blocks on the boom may be replaced witha soft strap. The maximum width of the soft strap
shall be 26mm. The soft strap shall only be fixed tothe boom using the holes drilled by the builder asshown in the diagram below.
(c)		 Traveller and Boom mounted
mainsheet blocks may bereplaced with the "Builder
Supplied" blocks shown in
the photo.
19. MAST(a)
To prevent abrasion of the mast step, tubes orcollars of uniform thickness not exceeding 1 mm intotal may be placed aroundthe entire circumference ofthe lower mast or the mast
step cavity. A tube or collar
shall not extend more than
10 mm above deck level.
		 In addition, a disc of uniform
thickness not exceeding
1mm in thickness may beplaced in the bottom of themast step.
(b)		 The mast or mast cavity may be lubricated.
(c)		 Tape or other bushing material may be applied toboth the plastic end cap, the collar of the upper
mast and the upper mast to ensure a snug fit. The
tape or bushing material may only be used on that
portion of the plastic parts that actually slide into thelower section and/or between the upper mast andthe collar and it shall be a uniform thickness aroundthe circumference. Taping or bushing material
above the collar to fair the collar into the mast is
prohibited.
(d)		 Flexible adhesive tape may be applied to theoutside of the joint of the upper and lower mast
sections to a limit of 40mm above and below thejoint to prevent rotation of the mast sections at thejoint.

OPTION 2
TWO RIVET OPTION
ON SOFT STRAP SEWN
INTO A LOOP

15mm*

SOFT STRAPSOFT STRAPMAINSHEET IN
NORMAL SAILINGPOSITION© ILCA 			OPTION 3
TWO RIVET OPTIONON SHORT SOFT STRAP

15mm*

15mm*

OPTION 1
SINGLE RIVET OPTION, SOFT
STRAP MAY BE, BUT DOES NOTHAVE TO BE, SEWN INTO A LOOP

33

Valid from 1st January 2023

NOTES:
1. 15mm DIMENSION MARKED * IS NOMINAL
2. HOLES FOR OPTIONS 2 AND 3 ARE POSITIONED TO FIT THE
ORIGINAL STAINLESS STEEL EYE STRAP
3. NO BOOM SHALL BE DRILLED WITH THREE HOLES AT THE
BOOM STRAP POSITION

Diagram for Rule 18(b)CROSS SECTIONS THROUGH BOOMS AND SOFT STRAPS SHOWING THE ONLY LEGAL FIXING OPTIONS

20. INSPECTION PORTS
Inspection ports not exceeding 153 mm internal diameter
may be installed on the deck or in the cockpit to provide
access to the hull cavity, provided that any inspection
port is fitted with watertight threaded covers (any bayonet
mounted parts are deemed to be not threaded).
Storage receptacles are permitted underneath hatch
covers.
21. CLIPS AND STORAGE BAGS
Clips, ties or bags to stow or secure safety or otherequipment may be used on the deck, in the cockpit, aroundthe mast or boom.
22. COMPASS, ELECTRONIC EQUIPMENT AND
TIMING DEVICES(a)		 One compass mounted on any part of the deckor the cockpit is permitted if the hull cavity is notpierced by anything other than the fasteners.
Compasses may not be fitted to inspection ports.
An additional wrist mounted compass is permitted.
Electronic, self-contained, digital compasses using
only magnetic input are permitted.
(b)		 Timing devices are permitted.
(c)		A timing device and electronic compass may be
integrated in the same device.
(d)		A compass or timing device must not be capableof displaying, delivering, transmitting, receiving,
calculating, correlating or storing information aboutwind speed, wind direction, boat speed or boat
position.
(e)		Any use of electronic equipment not specificallyallowed in the rules is prohibited unless the rules are
modified by the sailing instructions.
23. WIND INDICATORS(a)		 Wind indicators may be attached as desired
provided the sail is not cut and the buoyancy
qualities of the hull and mast are not impaired.
(b)		 Ribbons, wool or similar wind indicators may be
attached to the sail.
24. TAPE AND LINE
The use of flexible adhesive tape or similar, line or heat
shrink tube is permitted to secure shackle pins and clips,
and to bind sheets, control lines and rigging, except thattape or line shall not be used to construct new fittings ormodify the function of existing fittings.
25. SAFETY EQUIPMENT
Any additional equipment required by an international,
national or other governing authority for safety purposes
may be fitted or carried provided it is not used incontravention of the FUNDAMENTAL RULE.
26. REPAIRS AND MAINTENANCE(a)
Repairs and preventative maintenance to the sail,hull, deck, centreboard, rudder, mast, boom or
any fittings and fixings may be carried out without
violation of these Rules provided such repairs
are made in such a way that the essential shape,
characteristics or function of the original are notaffected.
(b) In the event of the failure of any fittings, or the
replacement of fittings as authorised by theseRules, the fitting or the replacement shall be thesame type as the original and shall be placed in aposition conforming to the Measurement Diagrams.
(c)Preventative maintenance includes the replacementof fasteners (screws, bolts, nuts, washers and rivets)
provided the replacement does not alter the functionof the fitting. The tolerances of the Measurement
Diagrams shall not be used to alter the position offittings. In addition the reversing of spars is permitted© ILCA 			

if the fittings are replaced in accordance with the
Measurement Diagrams. Any holes in the top sectionof the mast shall be permanently sealed with a rivet or
similar to maintain the buoyancy of the mast. .
(d)		 Sail panels and luff sleeves shall not be replaced.
(e)
Any flotation equipment (flotation foam blocks or
Cubitainer inserts) that is defective or has been
removed shall be replaced by fully air filled, builder
supplied, Cubitainer inserts which shall have an
equal volume to the defective or removed flotationequipment.
(f)		 The use of lubricants is unrestricted except that theyshall not be used on the hull (below the gunwales).
27. REEFING
The sail may be reefed by rolling the sail around the mast 1
or 2 times.
28. BOAT OR BODY MOUNTED CAMERAOne camera may be attached to the sailor or may be
mounted on the boat if the hull cavity is not pierced byanything other than the fasteners.

PART FOURILCA 6 RIG AND
ILCA 4 RIG OPTIONSPart 4 of these rules shall be read in conjunction with theremainder of the Class Rules.
When the ILCA 6 or the ILCA 4 rigs are used the Rules ofParts 1, 2, 3 and 5 of the ILCA Class Rules apply except
where specifically amended by Part Four.
29. ILCA 6 RIG(a)		 The ILCA 6 sail and bottom mast as supplied by anapproveed Builder shall conform to the measurement
diagrams which form part of these Rules.
(b) The ILCA 6 rig may be used in any class regatta
subject to the conditions in 29 (c) and any
restrictions in the Notice of Race and Sailing
Instructions.
(c)
The ILCA 6 rig may only be used in District
Championships and higher level regattas whenprescribed in the Notice of Race and Sailing
Instructions.
(d) In a series of races a ILCA 6 rig shall not bechanged for a ILCA 7 or ILCA 4 rig. A series is 2
or more races that count towards an overall points
total.
(e)
SAIL REGISTRATION NUMBERS & NATIONALLETTERS
Rules 4(c) and (f) shall be amended to read as follows:4(c) For ILCA 6 sails with numbers above 153000 andsails purchased after 1st June 1993 the sail numbers
shall be glued or sewn on each side of the sail, withthe bottom of the numbers on the starboard side of
the sail placed along a line parallel to and 400 mm (+or - 12 mm) below the underside of the middle batten
pocket. The bottom of the numbers on the port sideof the sail shall be placed on a line 400 mm (+ or - 12mm) below and parallel to the bottom of the numberson the starboard side of the sail. The starboard sailnumbers shall commence 100 mm (+ or - 12 mm)from the leech and the port side numbers shall finish
100 mm (+ or - 12 mm) from the leech.
		 (For additional guidance, see the Instructions
for Applying Sail Numbers on p. 51 along withaccompanying diagrams on pp. 52 - 55).
4(f) National Letters, if required, shall conform to thesame type, size, spacing and requirements as sailnumbers (refer rule 4(b), (c), (d) and (e)) and shall be

34

Valid from 1st January 2023

positioned as follows (also see diagram):
The top of the letters on the starboard side of thesail shall be placed on the bottom edge of thebottom batten pocket and its extension (+ 12 mm).
The starboard letters shall commence 100 mm(+ or - 12 mm) from the leech. The bottom of theletters on the port side shall be placed on a line 400
mm (+ or - 12 mm) below and parallel to the bottomof the letters on the starboard side of the sail. The
port letters shall finish 100 mm (+ or - 12 mm) fromthe leech. The letters shall all be the same colour,
which may be one of the colours of the digits of thesail number, or another distinctive colour.
		 National Letters shall be required at all WorldChampionships, Regional Championships andevents described as international events in thenotice of race or sailing instructions. National
Letters may be required at any other regatta by thenotice of race or sailing instructions.
(f)		 CLOTHING AND EQUIPMENT
Rule 6(a) shall be amended to read as follows:
6(a) For the purposes of RRS 50.1 (b) the maximum
total weight of competitors clothing and equipment
shall be 9 kg.
30. ILCA 4 RIG(a)
The ILCA 4 sail and bottom mast as supplied by anapproved Builder shall conform to the measurement
diagrams which form part of these Rules.
(b)		 The ILCA 4 rig may be used in any classregatta subject to the conditions in 30 (c) andany restrictions in the Notice of Race and Sailing
Instructions.
(c)		 The ILCA 4 rig may only be used in District
Championships and higher level regattas whenprescribed in the Notice of Race and Sailing
Instructions.
(d) In a series of races an ILCA 4 rig shall not bechanged for a ILCA 7 or ILCA 6 rig. A series is 2
or more races that count towards an overall points
total.
(e)		 SAIL REGISTRATION NUMBERS
Rules 4(b), 4(c) and 4(f) shall be amended to read as
follows:
4(b) On ILCA 4 sails all numbers shall be in accordancewith the Racing Rules of Sailing and shall be of thefollowing minimum dimensions:
		 Height 220 mm.
		 Width 150 mm excluding digit 1.
		 Thickness 30 mm.
		 Note: Optimist Class legal numbers conform tothis rule.
		 The maximum height to conform is 240mm.
		 Space between adjoining numbers / letters androws minimum 30 mm.
		 Sail numbers shall be regularly spaced.
		 Numbers on the starboard side shall be placed
above those on the port side.
		 Each number digit shall be one colour only.
		 The numbers shall be solid and easy to read.
4(c) For ILCA 4 sails with numbers above 153000
and sails purchased after 1st June 1993 the sailnumbers shall be glued or sewn on each side of
the sail, with the bottom of the starboard numbers
placed along the top edge of a line placed 270mm(0 to +12mm) below and parallel to the seam
below the bottom edge of the middle batten pocket.
The port side numbers shall be placed along aline 270mm below and parallel to the bottom of		© ILCA 			the starboard side numbers. The starboard side
numbers shall commence 100 mm (+ or - 12 mm)from the leech and the port side numbers shall end
100 mm (+ or - 12 mm) from the leech.
		 (For additional guidance, see the Instructions
for Applying Sail Numbers on p. 51 along withaccompanying diagrams on pp. 52 - 55).
4(f) National letters, if required, shall conform to thesame type, size, spacing and requirements as ILCA
4 numbers (refer rule 29 (e) 4 (b)).
		 For all ILCA 4 sails with numbers from 190000,
and for sails purchased from 1 April 2006 onwards,
The bottom of the starboard side letters shallbe placed along a line 270mm (+12mm) below
and parallel to the bottom of the numbers on theport side and start 100mm (+ or –12mm) fromthe leech. The bottom of the letters on the portside shall be placed along a line 270mm (+12mm)
below and parallel to the bottom of the letters on
the starboard side and finish 100mm (+ or –12mm)
from the leech.
		 For ILCA 4 sails with numbers under 190000 thatwere purchased before 1 April 2006, they may beplaced as above or along the same line, 270mm
below and parallel to the bottom of the numberson the port side, on opposite sides of the sail. The
letters on the port side shall be closer to the leech
than those on the starboard side, with the port side
letters finishing 100mm (+ or – 12mm) from theleech.
		 National Letters shall be required at all WorldChampionships, Regional Championships andevents described as international events in thenotice of race or sailing instructions. National
Letters may be required at any other regatta by thenotice of race or sailing instructions.
		 The letters shall all be the same colour, which
may be one of the colours of the digits of the sailnumber, or another distinctive colour.
(f)
MAST
Rule 5 shall be amended to read as follows:
5		 The ILCA 4 bottom mast is supplied with apre-bend aft of approximately 5 degrees. The
pre-bend shall not be increased or decreased. No
top mast that has permanent bend in it shall be
used at any time.
(g) CLOTHING AND EQUIPMENT
Rule 6(a) shall be amended to read as follows:
6(a) For the purposes of RRS 50.1 (b) the maximum
total weight of competitors clothing and equipment
shall be 8 kg.

PART FIVE

31. AMENDMENTS
Amendments to these Rules shall be approved byeach of:(a) the World Council,(b) the Advisory Council,(c)		 at least two-thirds of the membership castinga vote in response to a ballot published by theInternational Office of the Class. Only those votes
submitted within one month from the date of
publication of the rule change ballot shall be valid,and(d) World Sailing.

35

Valid from 1st January 2023

Class Rule Interpretations
1.

Approved compasses that meet the requirements of Rule 22.
Compass, Electronic Equipment and Timing Devices.
A list of approved compasses can be found on the ILCA website please go to the "Interpretations" tab under "ILCA Class Rules".

2. R epairs and Maintenance: Sailors may apply anti-abrasion material
at the traveller fairleads to prevent wear of the deck as a form of
preventative maintenance under rule 26(a).
3. H
 iking Strap: A sheaveless block, such as the “shock block” orequivalent, will be considered a ring for the purpose of rule 17(c).
4. In accordance with ILCA Class Rule 22e, the use of heart rate monitor
with no additional function or capability is permitted. The heart ratemonitor device shall comply with Class Rule 22.

Instructions for Applying Red
Rhombus For Women's Events
Sails used in the following women’s events shall carry a red rhombus above the top batten pocket on both sides;
a. World or regional (continental) championships.
b. Events described as “international events” by the Notice of Race or Sailing Instructions.
c. Other events that prescribe in the Notice of Race or Sailing Instructions that womencompetitors should be identified.
The minimum size and approximate position shall comply with diagrams below.

ILC

ILC

A4

A6

The rhombus may be retained for racing in other events.

© ILCA 			

36

Valid from 1st January 2023

Measurement Diagrams(pages 37 to 43 part of class rules)

All dimensions shown in millimetres

A.

B.
A.

MIN 965
MIN
235

MIN 965
MAX 1067© ILCA 			

37

Valid from 1st January 2023

MAX 2538
MAX 796

MIN 684

50

MAX

MAX
290

Eyes at aftend of cockpit

MAX 138

MIN 761275
Wooden12
backing plates
are under the deckfor the fitting of cam or clam cleats

MIN 2426

100 100

MIN 2903

Mainsheet block shall be attached to eyestrap in position A.
Centreboard Brake shall be attached in position B.
Centreboard Brake in diagram 1 may be replaced with thebuilder supplied Centreboard Brake shown in diagram 2

MAX 2947

2.

B.

MIN 3848

1.

MAX 3961

Measurements are shown only as a
guide to replacement in the event of failure.

ILCA 7, ILCA 6 & ILCA 4 MAST TOP SECTION
MAX 3600 (INCLUDING TOP PLUG)

305 +/- 5

ILCA 7, ILCA 6 & ILCA 4 BOOM
MAX 2740
1186 +/- 12

AFT EDGE OF FITTING

25 MAX, 8 MIN
TO AFT EDGE
OF FITTING

1047 +/- 25

MAX 482

71 +/- 121653 +/- 12

AFTERMOST PARTOF FITTING

All dimensions shownin millimetres(not to scale)

STOPPERDECKLINE

78

M
203

341

680

MA
X6

O

AX

135

R=6

R=6

0

MAX 20MAX 33

0

66

TR

AIL

ING
ED
MA
GE
X5
27

35

KEEL LINE© ILCA 			

38

Valid from 1st January 2023

ILCA 7 CLASS MKI SAIL
& MAST BOTTOM SECTION

Luff ½ foot and Leechmeasurements to betaken from front cornerof luff sleeve.

MAX 965

All dimensions shown in millimetres (not to scale)¾ LEECH50
X4
MA 430MIN

MAX 1720
40
X6
MA 620N
MI

MAX 385

MAX 185

MAX 100

MAX 2330

90o
LUF F
MAX 5130

BATTENS

600 MAX
400 MAX½ LEECHFor Concave Batten Caps
please see page 43¼ LEECH40
X6
MA 620MIN

90o

MAX 495½ FOOTMAX 5380

LEECH
MAX 5570

FOOTMAX 2740

MAX 2865 (INCLUDING BASE PLUG)LOWEST PARTOF FITTINGMIN 445945 +/- 5© ILCA 			

39

Valid from 1st January 2023

ILCA 7 CLASS MKII SAIL
& MAST BOTTOM SECTION
All dimensions shown in millimetres (not to scale)

Luff ½ Foot andLeech measurements
to be taken from front
corner of luff sleeve.

BATTENS (TAPERED)
750 MAX
600 MAX
400 MAX¾ LEECHMAX 990

To be used exclusively on
the Standard MKII Sail.

½ LEECHMAX 1760¼ LEECHMAX 2345

FOOT
MAX 2750
LEECH
MAX 5555½ FOOTMAX 5340
MAX 2865 (INCLUDING BASE PLUG)LOWEST PARTOF FITTINGMIN 445945 +/- 5© ILCA 			

40

Valid from 1st January 2023

LUFF
MAX 5120

ILCA 6 CLASS SAIL
& MAST BOTTOM SECTION

Luff ½ foot and Leechmeasurements to betaken from front cornerof luff sleeve.

MAX 93 0

All dimensions shown in millimetres (not to scale)¾ LEECH50
X4 0
MA N 4 3MI

MAX 1725
40

BATTENS

600 MAX
400 MAX½ LEECHX6
MA 6 2 0N
MI

MAX 23 4540¼ LEECHX6
MA 6 2 0N
MI

MAX 185

MAX 385

MAX 100

For Concave Batten Caps
please see page 43

90o

90o

LUFF
MAX 4560 MAX 495½ FOOTMAX 4780
FOOTMAX 2740
MAX 2262 (INCLUDING BASE PLUG)
INNER SLEEVE 1400 FROM TOP OF BASE PLUG
MIN
445
945 +/- 5© ILCA 			

LOWEST PART OF FITTING

41

Valid from 1st January 2023

LEECH
MAX 5010

ILCA 4 CLASS SAIL & MAST
BOTTOM SECTION

Luff and Leechmeasurements
to be taken fromfront corner ofluff sleeve.

All dimensions shown in millimetres (not to scale)
UPDATED AUGUST 201750
X4
MA 4 3 0
MIN
MAX 83 5

MAX 1500

40
X6 0
MA N 6 2MI

600 MAX
400 MAX½ LEECHFor Concave Batten Caps
please see page 43¼ LEECHMAX 20 60
MAX 2 940
X6 0
MA N 6 2
IM

5

MAX 1 4
5

MAX 100

BATTENS¾ LEECHo90
LUFF
MAX 4085

o

90

LEECH
MAX 4540

FOOTMAX 2480

MAX 1810 (INCLUDING BASE PLUG)

71-85

MIN 445945 +/- 5© ILCA 			

42

Valid from 1st January 2023

Concave Batten Caps
For ILCA 4, ILCA 6 and ILCA 7 MKI (Cross Cut) Sails
Not applicable for ILCA 7 MKII Sails

The diagrams below illustrate the methods to be used for the measurement of battens
using both classic and concave end caps. Please see pages 39-42 for full sail andbottom section diagrams.

BATTEN MEASUREMENT LENGTH
WHEN USING TWO CLASSIC END CAPS
400 mm MAXIMUM FOR TOP BATTEN
600mm MAXIMUM FOR LOWER BATTENSBATTEN MEASUREMENT LENGTH WHEN USINGONE CLASSIC END CAP AND ONE CONCAVE END CAP
400 mm MAXIMUM FOR TOP BATTEN
600mm MAXIMUM FOR LOWER BATTENS© ILCA 			

43

Valid from 1st January 2023

BATTEN LENGTH IS
MEASURED TO THE
MIDDLE OF THE
CONCAVE END CAP