Skud CA(UK) Skud 18 Class Rules
Note. There is a printable PDF leaflet link at the foot of this page + an Adobe reader download link if needed. Racing Rules Links. This will link you to a download for the current edition of the ISAF Racing Rules of Sailing and an Animated Racing Rules Quiz and a Racing Rules Blog. Scud 18 Class Rules
CLASS RULES 2008
REVISED JULY 2008
The SKUD 18 was designed in 2005 by Chris Mitchell.
SKUD 18 Class Rules Revised July 2008
INDEX
PART I – ADMINISTRATION
Section A – General
A.1 Language ............................... 4
A.2 Abbreviations ............................ 4
A.3 Authorities............................... 4
A.4 Administration of the Class .............. 4
A.5 ISAF Rules ............................... 4
A.6 Class Rules Variations ................... 4
A.7 Class Rules Amendments ................... 4
A.8 Class Rules Interpretation ............... 5
A.9 International Class Fee and
ISAF Building Plaque ......................... 5
A.10 Sail Numbers ............................ 5
A.11 Hull Certification ...................... 5
A.12 Change of Ownership.......................5
Section B – Boat Eligibility
B.1 Class Rules............................... 5
PART II – REQUIREMENTS AND
LIMITATIONS
Section C – Conditions for Racing
C.1 General ................................ 6
C.2 Crew ................................... 6
C.3 Personal Equipment ....................... 6
C.4 Advertising .............................. 8
C.5 Portable Equipment ....................... 8
C.6 Boat ....................................8
C.7 Hull ....................................9
C.8 Hull Appendages........................... 9
C.9 Rig .................................... 10
C.10 Sails ................................. 12
Section D– Hull
D.1 Builders .............................,... 13
Section E – Hull Appendages
E.1 Manufacturers............................. 13
Section F – Rigging
F.1 Standing Rigging ......................... 14
F.2 Running Rigging .......................... 14
Section G – Sails
G.1 Parts .................................. 15
G.2 General ................................ 15
G.3 Mainsail Identification................... 15
PART III – APPENDICES
Section H – Parts List
H.1 Parts List ................................
SKUD 18 Class Rules Revised July 2008
INTRODUCTION
SKUD 18 hulls, hull appendages, rigs and sails shall only be manufactured by builders
licensed by Access Sailing Systems Pty Ltd with the approval of the International
Association for Disabled Sailing (IFDS) in the class rules referred to as licensed
manufacturers. Equipment is required to comply with the SKUD 18 Building
Specification and is subject to an IFDS approved manufacturing control system.
SKUD 18 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.
Rules regulating the use of equipment during a race are contained in Section C of these
class rules, in ERS Part I and in the Racing Rules of Sailing.
This introduction only provides an informal background and the International SKUD 18
Class Rules proper begin on the next page.
4 SKUD 18 Class Rules Revised July 2008
PART I – ADMINISTRATION
Section A – General
A.1 LANGUAGE
A.1.1 The official language of the class is English and in case of dispute over trans-
lation the English text shall prevail.
A.1.2 The word “shall” is mandatory and the word “may” is permissive.
A.2 ABBREVIATIONS
A.2.1 ISAF International Sailing Federation
IFDS International Association for Disabled Sailing
MNA ISAF Member National Authority
IACA International Access Class Association
NACA National Access Class Association
ERS Equipment Rules of Sailing
RRS Racing Rules of Sailing
SCMC SKUD 18 Class Management Committee
A.3 AUTHORITIES
A.3.1 The international authority of the class is the ISAF which shall co-operate with
the SCMC and IACA in all matters concerning these class rules.
A.4 ADMINISTRATION OF THE CLASS
A.4.1 ISAF and IFDS has delegated its administrative functions of the class to the
SCMC until 1 January, 2009 at which time the IACA shall begin
administration, with the SCMC retained as an advisory board.
A.5 ISAF RULES
A.5.1 These class rules shall be read in conjunction with the ERS.
A.5.2 Except where used in headings, when a term is printed in “bold” the definition
in the ERS applies and when a term is printed in “italics” the definition in the
RRS applies.
A.5.3 These class rules shall be considered closed class rules for any purpose.
A.6 CLASS RULES VARIATIONS A.6.1 At Class Events – see RRS 88.1.d) – ISAF Regulation 26.5(f) applies. At all
other events RRS 86 applies.
A.7 CLASS RULES AMENDMENTS
A.7.1 Amendments to these class rules are subject to the approval of the IFDS and
ISAF
SKUD 18 Class Rules Revised July 2008
A.8 CLASS RULES INTERPRETATION
A.8.1 Interpretation of class rules shall be made by the Technical Officer, subject to
ratification by IFDS in cooperation with the SCMC.
A.9 INTERNATIONAL CLASS FEE AND IFDS BUILDING PLAQUE
A.9.1 The licensed hull builder shall pay the International Class Fee.
A.9.2 SCMC shall, after having received the International Class Fee for the hull, send
the IFDS Building Plaque to the licensed hull builder.
A.10 SAIL NUMBERS
A.10.1 Sail numbers shall be issued by the SCMC and after January 1, 2009 by the
IACA.
A.10.2 Sail numbers shall be issued in consecutive order starting at “001”.
A.11 HULL CERTIFICATION
A.11.1 A certificate shall not be issued.
A.12 CHANGE OF OWNERSHIP
A.12.1 Upon disposal of a boat, the former owner shall inform the IACA of the new
owner’s name, address and contact details.
Section B – Boat Eligibility
For a boat to be eligible for racing, it shall comply with the rules in this section.
B.1 CLASS RULES
B.1.1 The boat shall:
(a) be in compliance with the class rules.
(b) be crewed by at least one person who is a member in good standing of the
IACA.
(c) be defined by one set of licensed parts
6 SKUD 18 Class Rules Revised July 2008
PART II – REQUIREMENTS AND LIMITATIONS
The crew and the boat shall comply with the rules in Part II when racing. In case of
conflict Section C shall prevail.
The rules in Part II are closed class rules. Equipment inspection shall be carried out
in accordance with the ERS except where varied in this Part.
Section C – Conditions for Racing
C.1 GENERAL
C.1.1 RULES
(a) The ERS Part I – Use of Equipment shall apply.
C.2 CREW
C.2.1 LIMITATIONS
(a) The crew shall consist of two (2) persons.
(b) No crew member shall be substituted during an event of less than 3
consecutive days, unless approved by the Jury.
(c) Where centreline seats are specified or fitted, crew (buttocks) must remain
in contact with their seating at all times while racing.
(d) If one centreline seat only is fitted, one crew may use a trapeze.
C.2.2 WEIGHTS
(a) There is no restriction on the weights of the individual crew members, nor
their combined weight.
C.3 PERSONAL EQUIPMENT
C.3.1 MANDATORY
(a) The boat shall be equipped with personal buoyancy for each crew
member to the minimum standard EN 393: 1995 (CE 50 Newtons), or
USCG Type III, or AUS PFD 2.
C.3.2 OPTIONAL
(a) Equipment inside Control Points (CP) (per C 9.8) shall not be changed to
alter functionality.
(b) Additional equipment to control running rigging specified in C9.8 which
compensates for a sailor’s disability is permitted after the CP following the
approval of the class Technical Committee and is considered part of the
hull weight.
(c) Location of control lines after the CP may be changed
SKUD 18 Class Rules Revised July 2008
(d) Seating may be of any origin. All seating must meet the following
specifications:
1. All seating must be mechanically attached to the hull on the centreline
via the provided tracks in a manner to avoid separation while under sail.
Their longitudinal location is optional, and must be fixed during racing.
2. There must be restraints built into the seating to keep the sailor in the
seating at all angles of heel. Restraints must secure the crew to their seat
at all times during racing. Buckles and release mechanisms must be of a
“quick release” type and be clearly visible for fast assistance on the
water.
3. Horizontal seat width (as opposed to the back or leg rest extension) shall
not exceed 500mm athwartships. Horizontal seat length shall not exceed
600mm longitudinally measured from the centre of the seat back at the
sitting surface to the most forward sitting surface (ie. to the steering
joystick if mounted in centre of seat). Leg rests are not part of the seat
length, but can be integral to the seating.
4. A canting mechanism which allows the sailor to remain in the vertical
position relative to the horizon while sailing is permitted, limited to a
maximum total rotation of +/- 25 degrees from centre. Safety
mechanisms to prevent uncontrolled motion of the seat must be
demonstrated. The intent of this provision is to allow for the comfort
and wellbeing of a sailor and not to project weight to windward.
5. The axis of rotation for canting seats shall be along the hull centreline,
parallel to the floor and not greater than 50mm below the projected
intersection of the seat plane (underside of cushion) and the backrest
plane, or 50mm below the seat mounting base plane. Maximum height
of the sitting surface (including cushion) is 120mm above the seat
plane.
6. Fixed seating must have a backrest and sides with a minimum height
above the sitting surface of 125mm. Backrest and sides shall extend for
a minimum of 50% of the seat width and length respectively. The sides
shall be within 25 degrees of vertical. The intent of this provision is to
allow for the comfort and wellbeing of a sailor and not to project weight
to windward.
7. Overall seat height from the cockpit floor to the sitting surface shall not
exceed 450mm. Upon application to the Class Technical Officer, an
increased seat height may be allowed for individual sailors of short
stature.
(e) A single trapeze may be used as per C.2.1. The trapeze wires may be
stainless steel wire of not less than 2.3 mm diameter or spectra lines of not
less than 3.0 mm diameter and attach to the topmast 150mm above the
hounds
8 SKUD 18 Class Rules Revised July 2008
C.4 ADVERTISING
C.4.1 LIMITATIONS
Advertising shall only be displayed in accordance with Category C of the ISAF
Advertising Code.
C.5 PORTABLE EQUIPMENT
C.5.1 FOR USE
(a) OPTIONAL (not part of hull weight unless noted)
(1) Timing devices, and mechanical wind indicators are permitted, but are
not part of the hull weight.
(2) Compasses with brackets are permitted, and are part of the hull
weight. GPS are not permitted..
(3) Mooring line.
(4) Spares and tools (are not part of hull weight).
(5) Tuff’s or ribbons in the rigging. (are part of hull weight)
C.5.2 NOT FOR USE
(a) MANDATORY
(1) Towing rope, floating, minimum 15 m long of not less than 6 mm in
diameter run through forestay eye (is part of hull weight).
C.6 BOAT
C.6.1 LIMITATION
(a) Hull, Hull Appendages and Spars are as supplied by a licensed
manufacturer. No alteration allowed.
C.6.2 WEIGHT
Minimum
The weight of the boat, rig, seats and fixed adaptive aids (e.g. servos, fixed-location
batteries) in dry condition
380 kg
All boats shall add correctors as required to reach
the assigned racing minimum weight.
The weight shall be taken excluding sails, but including all portable equipment
as listed in C.5.
SKUD 18 Class Rules Revised July 2008
C.6.3 CORRECTOR WEIGHTS
(a) Corrector weights as required to bring a boat to the specified minimum
racing weight shall be securely fastened to seat tracks and split equally
across centreline.
C.6.4 FLOTATION
(a) Removal of floatation material built into the hull is not allowed.
C.7 HULL
(a) Hulls and Decks shall comply with the building specification in force at
the time of manufacture..
C.7.1 MAINTENANCE AND REPAIR
(a) In the event of damage to any part of the hull, necessary repairs may be
made provided repairs are made in such a way that the essential shape and
function is not materially affected. Fittings shall be attached in the same
position as before the repair, or as close as is structurally possible.
(b) The hull may be sanded and polished, except that the shape or weight
distribution as originally supplied shall not be altered.
C.7.2 FITTINGS
(a) USE
(1) Watertight integrity of the hull shall be maintained at all times.
C.7.3 LIMITATIONS
(a)
No holes may be made in the hull molding, except for the purpose of
making repairs.
(b) Only holes necessary for mounting fittings or adaptive equipment may be
made in the deck mouldings.
(c) Additional mouldings, consoles or bridges are allowed as adaptive
equipment required for sailors with a disability. Such additions must be
approved by the Class Technical Committee. The structural characteristics of
the boat shall not be altered by such equipment.
(d) Fabric spinnaker chute covers are allowed, subject to approval by the Class
Technical Committee.
C.8 HULL APPENDAGES
C.8.1 MAINTENANCE AND REPAIR
(a) Hull appendages shall comply with the building specification in force at
the time of manufacture.
(b) The hull appendages may be sanded and polished, except that the shape or
weight distribution as originally supplied shall not be altered.
(c) Aluminium rudder foils may not be filled and sanded. Urethane plugs
only may be faired
10 SKUD 18 Class Rules Revised July 2008
C.8.2 LIMITATIONS
(a) Only one keel and two rudder blades shall be used during an event,
except when a hull appendage has been lost or damaged beyond repair.
C.8.3 KEEL
(a) USE
(1) The keel must be fixed in position by the mechanism provided. No
other location or arrangement allowed. It can not be shimmed to sit
higher or the top flange altered in any way.
(2) Tape, cloth, a polyurethane or rubber gasket, or wedges made from
polyethylene or other material, can be used to prevent movement of
the fin stock in the trunk provided they do not prevent the rapid
removal of the fin from the trunk, or protrude from the trunk below
the waterline.
(3) Max weight of bulb is 136kg
(4) Max weight of keel and bulb is 163kg
(5) The fore & aft keel angle at the leading edge and hull is 90 degrees
with a tolerance of +/- 10mm measured horizontally 1 metre below
hull.
(6) The vertical angle of the keel bulb is 90 degrees to the leading edge
measured from a projected line between end centres with a tolerance
of +/- 10mm measured vertically at both end centres.
(7) The keel bolt plugs (supplied plastic covers) are optional and may be
replaced or removed and faired. Removal may be required for
measurement purposes and replacement is the owner’s
responsibility.
C.8.4 RUDDERS
(a) USE
(1) The rudder shall be fixed in its fully lowered position.
(2) Both rudders must be present for racing.
(3) A rudder tie-rod located not less than 150mm longitudinally from the
centreline of the rudder pins shall connect the rudders or tiller arms.
The length of the tie-rod shall not be adjusted while racing.
(4) Rudder pin bushes may be fitted in the gudgeon plates.
C.9 RIG
C.9.1 MODIFICATIONS, MAINTENANCE AND REPAIR
(a) Spars shall comply with the building specification in force at the time of
manufacture. Rigging shall comply with the current class rules.
SKUD 18 Class Rules Revised July 2008
C.9.3 LIMITATIONS
(a) Only one set of spars and standing rigging shall be used during an event,
except with permission of the jury when an item has been lost or damaged
beyond repair.
C.9.4 MAST
(a) USE
(1) The spar shall be stepped in the mast step supplied by a licensed
manufacturer in such a way that the heel is not be capable of moving
more than 1 mm in any direction.
(2) The mast heel shall be secured in the centre hole of the mast step.
C.9.5 BOOM
(a) USE
(1) The boom spar shall be attached to the mast spar while racing using
the boom gooseneck fitting provided on the mast.
(2) The boom support strut may be removed.
C.9.6 RETRACTING BOWSPRIT
(a) USE
(1) The bowsprit shall be capable of retracting to an extension of no
more than 100mm beyond the bow when on a windward leg of the
course.
(2) The bowsprit shall be extended only when setting or flying the
spinnaker.
(3) Bowsprit extensions or ‘sheet-keepers’ may be fitted.but must be of
a flexible material and extend no more that 150mm from the
outboard end of the bowsprit.
(4) Bowsprit extensions or ‘sheet-keepers’ are not part of the overall
boat length.
C.9.7 STANDING RIGGING
(a) USE
(1) Rigging links and rigging screws shall not be adjusted while racing.
(2) The forestay shall be located in the centre hole of the stem fitting.
C.9.8 RUNNING RIGGING
(a) LIMITATIONS – Control Points are defined to limit the functionality of
the running rigging, but to allow adaptations for the use of the control.
Any termination of function beyond the control point is open.
(b) USE
(1) The mainsail sheet shall be defined with two control points. The
sheet’s first control point is at one or two rocking blocks in the af 12 SKUD 18 Class Rules Revised July 2008
end of the boom, which must be used for at least one active part of
the sheet. The sheet then runs forward through the boom with an exit
at the front of the boom that acts as the forward control point. The
mainsheet shall have a minimum purchase of 2:1 with one or two
working ends.
(2) The jib sheet shall be led from the jib clew through the jib car on the
jib track, and forward to at least one exit box in the foredeck which
acts as the control point.
(3) The spinnaker sheet and guy shall be led to the sheet blocks located
aft of the shrouds on the deck of the boat. These are the control
points for the sheets.
(4) The spinnaker halyard and bowsprit setting and retractions lines shall
be led down through the mast, down through the step, around a
cheek block that sends the line forward around a block attached to
the pole extension line which is the forward control point.
(5) The retrieval line shall run from the “pull points” in the spinnaker,
down through the spinnaker sock and back to a fixed block attached
to the aft bulkhead which will be the control point
(6) The kicking strap shall have purchase not exceeding 16:1 and be led to
the back of the mast step which acts as the control point.
(7) The mainsail clew outhaul shall be 2:1 and led to the front of boom
which acts as the control point.
(8) The mainsail Cunningham control shall be 4:1 and shall led to the sub
cockpit floor beneath the tack of the main which will be the control
point.
(9) The mainsheet bridle (if fitted) shall be of any fixed length and cannot
be adjusted while racing.
(c) REPLACEMENT – Fittings may be replaced by those of another
manufacturer but shall maintain the same function.
C.10 SAILS
C.10.1 MAINTENANCE AND REPAIR
(a) Sails shall not be re-cut or otherwise altered from their original design.
Emergency repairs are allowed, but the sail must be re-measured at the
first available opportunity. Sail damage and subsequent repair may
invalidate the sail from use in competition based on the opinion of the
measurer at the event.
C.10.2 LIMITATIONS
(a) Not more than 1 mainsail, 1 jib, and 1 spinnaker shall be carried aboard.
(b) Not more than 2 mainsails, 2 jibs, and 2 spinnakers shall be used during
any regatta or championship, except with the permission of the jury when
a sail has been lost or damaged beyond repair
SKUD 18 Class Rules Revised July 2008
C.10.3 MAINSAIL
(a) IDENTIFICATION
(1) The national letters and sail numbers shall comply with the RRS except
where prescribed otherwise in these class rules.
(2) The national letters and sail numbers shall be wholly between the 3
rd and 4th batten pockets from the head of the sail.
(3) The national letters and sail numbers shall be approximately parallel to
the batten pockets.
(b) USE
(1) The sail shall be hoisted on a halyard. The arrangement shall permit
hoisting and lowering of the sail at sea. The halyard may not be
adjusted while racing.
C.10.4 JIB
(a) USE
(1) The sail shall be hoisted on a halyard. The arrangement shall
permit hoisting and lowering of the sail at sea. The halyard may be
adjusted while racing.
(2) RRS 50.4 Headsails shall not apply.
C.10.6 GENNAKER
(a) USE
RRS 50.4 – Headsails, shall not apply, except that for the purpose of
Appendix G – Advertising, the gennaker shall be deemed a spinnaker.
No advertising shall be placed within 1m of tack / head nor on the front
2 luff panels
Section D - Hull
D.1 BUILDERS
D.1.1. Hull builders shall be licensed by Access Sailing Systems Pty Ltd and approved
by the IFDS.
Section E - Hull Appendages
E.1 MANUFACTURERS E.1.1. Manufacturers shall be licensed by Access Sailing Systems Pty Ltd and approved
by the IFDS..
14 SKUD 18 Class Rules Revised July 2008
Section F - Rigging
F.1 STANDING RIGGING
F.1.1 MATERIALS
(a) The standing rigging shall be of stainless steel.
F.1.2 DIMENSIONS
Minimum Maximum
Forestay length from centre of the bow fitting
attachment hole to Mast Datum Point (see
illustration below)
670 mm 680 mm
Forestay diameter 3.0 mm 3.2 mm
Shroud diameter 3.0 mm 3.2 mm
F.1.3 MAST DATUM POINT
The Mast Datum Point (MDP) is the most forward point of the underside of the
mast plug plate (see illustration below).
F.2 RUNNING RIGGING F.2.1 MATERIALS
(a) Materials are optional with regards to length, diameter and taper.
(b) Wire is allowed for the main halyard for use with a halyard lock. No other
wire is allowed.
SKUD 18 Class Rules Revised July 2008
Section G – Sails
G.1 PARTS
G.1.1 MANDATORY
(a) Mainsail
(b) Jib
(c) Gennaker
G.2 GENERAL
G.2.1 RULES
(a) Sails shall comply with the class rules in force at the time of manufacture.
G.2.4 SAILMAKER
(a) Manufacturers shall be
licensed by Access Sailing Systems Pty Ltd and
approved by the IFDS.
.
G.3 MAINSAIL
G.3.1 IDENTIFICATION
(a) The class insignia shall conform with the dimensions and requirements as
detailed in the diagram below. (NOTE: A layout diagram and insignia
graphics files are downloadable from the technical section of the class
website - www.accessclass.org)
16 SKUD 18 Class Rules Revised July 2008
PART III – APPENDICES
The rules in Part III are closed class rules. Measurement shall be carried out in
accordance with the ERS except where varied in this Part.
Section H
H.1 PARTS LIST
Standard fittings list Part # Options or restrictions
(Where no comment as per class rules)
Top Mast SKUDTopMast Licensed supplier only
Mid Mast SKUDMidMast Licensed supplier only
Lower Mast SKUDLowMast Licensed supplier only
Spreader SKUDSpr Licensed supplier only
Spin Halyard block (top) RF 20100 2mm +/- dia sheave
Main Halyard sheave Ronstan 9707012F 2mm +/- dia sheave
Mast Tip casting SKUDTipCast Licensed supplier only
Jib Halyard exit box RF20711A 2mm +/- dia sheave
Mast Goosneck RM686
Vang Foot SKUDFoot Licensed supplier only
Mast Plug SKUD Plug Licensed supplier only
Shroud Base RM 399HD
Boom section SKUDBoom Licensed supplier only
Boom Goosneck RM678(m)
Exit box (outhaul) RF20711A 2mm +/- sheave dia
Bullet blocks RF20100 5mm +/- sheave dia
Bowsprit SKUDSPCom Licensed supplier only
Small Exit Box RF20711A 2mm +/- sheave dia
Forestay fitting SKUDFS,Chain Licensed supplier only
Micro cheek block RF20151 2mm +/- sheave dia
Micro block RF20101 2mm +/- sheave dia
Mast Step Channel SKUDMastStep Licensed supplier only
Gennaker Sock SKUDSpinSock Modification or replacement with an
item of similar function permitted
Spin Sheet Ratchet Blocks RF42100 2mm +/- sheave dia
Upright Lead Block RF30171 2mm +/- sheave dia
Block swivel shackle head RF30100 2mm +/- sheave dia
Micro Cheek Blocks RF20151 2mm +/- sheave dia
Single block with Hook HA2021HK*1
Rudder Pin SKUDRudderPin Varying diameters permitted
Rudder Gudgeon Top SKUDGudTop Licensed supplier only
Rudder Gudgeon Bottom SKUDGudBot Licensed supplier only
Rudder SKUDRudder Licensed supplier only
Keel Fin SKUDFin Licensed supplier only
Bulb SKUDBulb Licensed supplier only
Hull SKUDHull Licensed supplier only
SKUD 18 Class Rules Revised July 2008
Effective: July 10, 2008
Previous issues: August, 2007 & March 2008
© ISAF 2007
For an easily printable PDF version click the following link A Skud CA (UK) Skud 18 Class Rules
If you do not have a PDF reader you can download Adobe Reader free. click this link for the download page Adobe Reader Racing Rules Links. This will link you to a download for the current edition of the ISAF Racing Rules of Sailing and an Animated Racing Rules Quiz and a Racing Rules Blog. 
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