1.OBJECTIVES OF THE CLASS RULES
1.The J/24 is a one design class created to fulfill the diverse needs of recreational
sailors such as cruising, one design racing, day sailing and handicap racing. These
rules are intended to preserve important design characteristics: ease of handling,
low cost of ownership, safety, comfort, and the one design nature of the boat.
2.Except where variations are specifically permitted, yachts of this class shall be alike
in hull, deck, keel, rudder and mast construction, weight and weight distribution, sail
plan and equipment.
3.All yachts shall comply with official Plans A, B, C & D, building specifications and the
class rules. No alterations or modifications are permitted unless explicitly stated in
the current rules.
4.Alterations or modifications to official Plans A, B, C & D, and class rules shall only
be permitted with the joint approval of the copyright holder, the International J/24
Class Association (IJCA) and the ISAF.
1.Authority The international authority for the class shall be the ISAF which shall
cooperate with the International J/24 Class Association on all matters regarding
these rules. Interpretations of these rules shall be made by the ISAF which in
coming to its decision may consult the International J/24 Class Association and the
2.Language The official language for the class shall be English. The word "shall" is
mandatory. The word "may" is permissive. In the event of dispute over class rule
interpretation, the English text shall prevail.
3.Builders J/24s shall be built only by builders licensed to do so under the copyright of
J Boats, Inc., (557 Thames St., P.O. Box 90, Newport, RI 02840) and shall comply
to the building specifications detailed by the copyright holder.
1.Building License Applications for building licenses shall be made to J Boats,
Inc., who shall request that the national authority of the country concerned
indicates its support for the applicant.
4.International Class Fee The International Class Fee shall be payable to J Boats, Inc.
when the moulding of the hull commences.
1.The Measurement Certificate shall include all of the information contained in
Parts A, B, C and D of the J/24 Class Measurement Form.
2.A yacht's sail number shall be her hull number unless otherwise prescribed by
the owner's national authority.
3.No yacht shall race unless a current valid Measurement Certificate has been
issued by the owner's national authority, or if the national authority is not
administering the class, by the National or International J/24 Class
4.Change of ownership shall invalidate the Measurement Certificate and shall
require a new Measurement Certificate.
5.Any alteration to the hull or alteration to or replacement of the keel, rudder, and
spars invalidates the Measurement Certificate until remeasured. A major
repair to any of the foregoing or replacement of an item of equipment may also
invalidate the Measurement Certificate.
6.It is the responsibility of an owner to ensure that the yacht complies at all
times with the current class rules and that a copy of the Measurement
Certificate and the Inventory of Required and Optional Equipment (Rule 3.7.3)
are kept aboard the yacht.
7.No yacht shall race unless the owner(s) and helmsman(men) are full
members of an NJCA or the IJCA.
8.No yacht shall race without a current J/24 Class Association membership
sticker placed on the outer face of the transom near the upper starboard
1.All class racing at World Events shall be classified Category A as described in
Racing Rules of Sailing Appendix G.
1.Yachts shall only be measured by a measurer recognized by Its National
Authority and the International J/24 Class Association.
2.A measurer shall not measure a yacht, spars, sails, or equipment owned or
built by himself, or in which he is an interested party or has a financial
3.The builder shall weigh and record the weight of the keel before assembly with
4.The boat in 'Builder's Weight' condition shall be not less than 1190 kg or more
than 1250 kg on certified scales. This weight shall include hull, keel, rudder
and tiller with fittings, deck and all specified mouldings and structures and all
fixed fittings as detailed on Plan A. Additionally, distinctively marked,
permanently fixed and completely capsulated corrector weights not exceeding
30 kg. in total weight complying with rule 3.7.2b), b)i), and c), shall be used
when required to meet the Builder's minimum weight. Builder's Weight
excludes all spars, standing rigging, running rigging, portable equipment and
hardware. The builder shall record the weight and complete Parts B and C of
the measurement form then deliver the completed form to the owner of each
new yacht. The builder shall also deliver one copy each to the Copyright
Holder and the NJCA where the builder is located and retain one file copy.
5.Tolerances in measurement in the rules and measurement plans are to
provide for minor building errors or age distortion.
6.The measurer shall report on the measurement form anything which is
considered to be a departure from the intended nature and design of the
yacht, or to be against the general interest of the Class. A measurement
certificate may be refused even if the specific requirements of the rules are
8.Method of Measurement
1.The method of measurement, unless otherwise stated, shall be in accordance
with the recommendations of the ISAF.
3.CONSTRUCTION AND MEASUREMENT
1.The hull, keel stub, keel, deck, rudder, sailplan, and basic interior layout and
fittings shall conform to the building specifications, Class rules and official
Plans A, B, C & D.
2.Major repairs requiring major rebuilding or replacement of a gelcoat surface
must have the written approval of a J/24 Class Measurer. Documentation of
the work involved must be submitted when the yacht is presented for
re-measurement, Rule 2.5.5.
3.Any alleged or suspected alteration to the configuration of the hull, deck, keel
or rudder of a yacht for which specific descriptions are not stated in the rules
or specifications, or following a protest concerning the same, shall be
compared by a measurer appointed by the NJCA or IJCA to a sample of 10
The disputed yacht shall be accepted if she does not show any evidence of
having been altered and if she has dimensions equal to, or between, those of
the maximum and minimum dimensions obtained from the sample of 10
If there is evidence of any alterations having been made or if the dimensions
are greater or less than those of the maximum or minimum obtained from the
sample of 10 yachts, the matter shall be referred to the protest committee for
4.Required and optional equipment shall be functional for its intended use.
1.The hull, deck and interior shall be moulded in glass reinforced plastics to the
building specification of lamination in moulds licensed by J Boats, Inc. and
approved by the ISAF and the IJCA. No yacht shall be deemed a J/24 until it
has been completed with a building number assigned by J Boats, Inc. molded
into the transom.
Hollows and indentations on the hull exterior as supplied by the licensed
builder may be filled in order to achieve a fair surface. Removal of gelcoat is
prohibited, except for light hand sanding in preparation for the application of an
2.The keel stub may be faired to maximise keel position to rule 3.3.3 with
provisions of the rules 3.1.2 and 3.2.8 a and b.
3.The cockpit, deck and interior bulkheads shall conform to the details of official
Plan A. The main companionway cover shall be supplied by a licensed builder
or licensed supplier.
4.The cabin moulding on the starboard side aft of the main bulkhead shall be
fitted with either a sink and drain and water tank or a stove with a separate
liquid petroleum gas or alcohol container of not less than 1.80kg in weight. The
sink shall drain into a plastic container with a minimum capacity of 5 liters
and/or overboard by means of a through hull fitting.
5.The deck shall be fitted with two stanchions on each side, port and starboard
as detailed in Plan A. Taut lifelines of wire not less than 4mm diameter shall
be attached to the pulpit and pushpit and pass through the stanchions. The
height of the lifelines above the sheerline when measured vertically shall be
not less than 500mm. Where second lifelines are fitted, they shall be of wire
not less than 3mm diameter, attached to the pulpit and pushpit. When lifelines
are secured by lanyards, the lanyards shall be of synthetic rope with an
exposed length of not more than 100mm. The stanchions shall not extend
outboard of the sheer in plan.
6.The chain plates shall be fixed to the aft side of the forward bulkhead by the
7.The minimum moulded radius of the corner intersecting the hull and the
transom is 2mm. Fairing material may be added to reduce the corner radius
to 2mm, but this fairing material shall not extend aft of, nor more than 10mm
forward of the vertical plane of the moulded transom.
8.Prohibitions The following are not permitted:
a) Coring, drilling out, rebuilding, replacement of materials, grinding or
relocating standard equipment in any way to reduce weight, to improve
moments of inertia, or to change standard shapes.
b) Reshaping of the hull profiles or contours.
c) Windows or skin fittings other than one each for depthmeter and/or a
knotmeter/ log and/or two for a marine toilet.
d) Anything that is considered to unnecessarily increase the 'Basic Yacht
Weighed Dry', Rule 3.7.1(4).
1.The keel shall be of moulded lead to the building specifications and cast in a
mould supplied by J Boats, Inc.
2.The external dimensions and configuration of the keel shall comply with the
table of offsets contained in official Plan C. The keel may be overcoated with
any protective material with a comparative density of less than three and
faired, provided it complies with dimensions in official Plan C.
3.The distance measured from the junction of the transom and the hull at the
a) The trailing edge of the keel stub at the hull shall be not more than 3020mm
or not less than 2996mm.
b) A point 603mm down the trailing edge of the keel from the hull shall be not
more than 3125mm nor less than 3095mm.
4.The leading and trailing edges shall be fair and within +/- 5mm of a straight
line between sections I and VI.
4.Rudder and Tiller
1.The rudder shall be supplied by a licensed builder or licensed supplier.
2.The external dimensions and configuration of the rudder shall comply with
official Plan D.
3.The weight of the rudder, including tiller, extension and fixed fittings, shall be
not less than 13.5kg.
4.Not in use.
5.Rudder pintles may be replaced with larger pintles of the same material which
are of no less weight than the original pintles.
6.The tiller shall be made of wood. Tiller extensions of any material may be
7.The leading edge of the rudder shall be parallel within a tolerance of +/-10mm
to an extension of the vertical straight line down the aft side of the transom.
5.Spars and Rigging
1.The mast and boom shall conform to the spar specification and be supplied
by a licensed builder. Replacement mast and/or boom may be supplied by a
licensed builder or a licensed spar manufacturer. No alterations or
modifications to the spar extrusions are permitted except to facilitate the
attachment of rigging and fittings as specified in these rules.
a) Rotating masts are not permitted.
b) The distance from the forward face of the mast at the lower edge of the
band in rule 3.5.2 e, measured directly to the stem at the sheerline (ref. Plan
B) shall be not more than 2925 mm or not less than 2895 mm.
c) The mast shall be fixed at the heel and be chocked at deck level in way of
the mast and shall not be altered when racing.
d) Distinguishing contrasting colored bands of a minimum width of 20mm
shall encircle the mast. The distance from the upper edge of the lower band
(at standard boom height) to the lower edge of the upper band shall be not
more than 8538mm.
e) A distinguishing contrasting colored band of a minimum width of 20mm
shall encircle the mast, with the lower edge 7725mm below the forestay fixing
point as defined in Rule 3.5.3(b). The lower edge of the band shall be
permanently marked on the forward surface of the mast.
f) Not more than two spinnaker boom attachment fittings shall be fixed to the
forward surface of the mast. The maximum height shall be not more than
1555mm above the lower edge of the measurement band defined in Rule
3.5.2(e). The fittings shall project not more than 55mm horizontally from the
forward surface of the mast.
a) The mast standing rigging shall only consist of the one forestay, or optional
permitted equipment, one backstay and backstay bridle, two upper shrouds
and two lower shrouds. The standing rigging shall only be of stainless steel or
galvanized steel multi-strand wire. The shrouds and forestay, except when a
permitted optional forestay equipment is fitted, shall be not less than 4.7mm in
diameter. The backstay and backstay bridle shall be not less than 3.9mm in
b) The forestay shall be fixed between (1) a point on the forestay fitting of the
mast bracket not more than 30mm or less than 20mm from the forward
surface of the mast and not less than 8125mm above the sheerline abreast
the forward side of the mast and (2) a point on the stem head fitting not more
than 70mm or less than 50mm above the intersection of the stem line and the
c) With the forestay in place, the distance measured in a straight line from the
fixing point on the mast bracket to the intersection of the stemline and the
sheerline shall be not more than 8670mm or less than 8595mm.
d) Not in use.
e) The backstay shall be fixed to the masthead crane and backstay bridle.
f) The overall length of the axis of the spreaders from the surface of the mast
to the bearing point of the upper shrouds shall be not more than 800mm or
less than 760mm. A straight line between the shroud bearing surface of each
spreader shall be not less than 95mm measured as the shortest distance
from the aft edge of the mast, measured with or without rig tension.
a) One spinnaker halyard of synthetic rope not less than 6mm diameter which
shall exit through the mast bracket and bear not more than 35mm forward of
the mast or more than 40mm above the center of the forestay fixing pin.
b) One mainsail halyard of wire not less than 3mm diameter and/or synthetic
rope of 8mm diameter.
c) Not more than two jib or genoa halyards of wire not less than 3mm
diameter and/or rope of 6mm diameter, which shall not intersect the forward
surface of the mast above the intersection of the extension of the forestay and
the mast surface.
d) One kicking strap (vang) of synthetic rope of not less than 8mm diameter in
a tackle not exceeding 8:1 power ratio. A wire strop of not less than 4mm
diameter or synthetic rope strop of not less than 8mm and not more than
305mm in length may be used to connect the kicking strap to the attachment
bracket on the mast.
e) One spinnaker boom downhaul of synthetic rope not less than 6mm
f) One mainsail outhaul (or leech tensioning control) of wire and/or synthetic
rope with not more than 6:1 power ratio.
g) Cunningham controls of synthetic rope using a maximum of 6:1 power ratio
which may include a single wire strop for attachment to the mainsail or
h) One backstay adjuster tackle of not less than 6mm diameter synthetic rope
and a 4:1 maximum power ratio attached to the bridle blocks.
i) Two mainsheet traveller control lines of synthetic rope with maximum of 2:1
j) One mainsheet of a single length of synthetic rope not less than 8mm
diameter and having a maximum power ratio of 6:1.
k) Spinnaker sheets of synthetic rope not less than 8mm diameter.
l) Headsail sheets of synthetic rope not less than 8mm diameter.
m) Reefing lines of synthetic rope.
n) One spinnaker boom uphaul of synthetic rope not less than 6mm diameter.
a) The boom shall not be tapered or permanently bent.
b) The boom may be fitted with attachment points only for an adjustable
outhaul, topping lift, one mainsheet block, kicking strap (vang), reefing
equipment, and leech tensioning devices.
c) A distinguishing contrasting colored band of a minimum width of 20mm
shall encircle the boom. The forward edge of the band shall be not more than
2970mm from the aft surface of the mast, when the boom is held at right
angles to the mast.
d) The tip weight of a boom at the outhaul without a vang, mainsheet and
blocks shall be not less than 3.3kg.
The overall length of the spinnaker boom, including fittings, shall be not more
than 2895mm. The weight of the spinnaker boom and fittings shall be not less
than 2.7kg. Deletion of a sentence and a,b,c
1.Except as provided in Rule 6.1.7, only one mainsail, one genoa, one jib, and
one spinnaker shall be on board when racing.
2.All sails shall be constructed of a single layer of fabric except for permitted
reinforcements, constructional seams, tablings, reefing and anti-chafe
patches, camber lines, numbers, and repairs to damage. The mainsail and jib
shall be made of woven polyester. The genoa shall be made of either woven
polyester or polyester substrate/polyester film laminate. The spinnaker shall
be made of nylon. When woven polyester or nylon is torn it shall be possible to
separate the fibers without leaving evidence of a film. No sail shall have elastic
(shock) cord in the luff or foot.
3.The mainsail, jib and genoa may each be fitted with not more than four
transparent windows of any material. If fitted, no dimension of any window
shall be more than 1500mm and any edge of any window shall be not less
than 80mm from the nearest edge of sail.
4.The sails shall be measured in accordance with Appendix A of the Class
5.Sails may be reinforced with additional layers of cloth of weight not greater
than the body of the sail. Reinforcement, finishing materials or coating applied
to the reinforcement shall not prevent the sail from being folded. All
reinforcement shall be capable of being folded in any direction without
damaging the fibers.
6.National letters and distinguishing numbers shall be placed on the mainsail,
genoa and spinnaker in accordance with the Racing Rules of Sailing.
7.The Class emblem on the mainsail shall be as on Plan B, in blue, and
contained within two 305 x 610mm rectangles located starboard on top of port
but separated by a 75mm space. The centerlines of the rectangles shall be
near to the line between mid-head and mid-foot, and between the top two
8.The national letters and distinguishing numbers shall be not less than:
Width 200mm (except the figure or letter 1)
The space between adjoining letters and numbers shall be 60mm. The last
digit of the starboard number or letter on the genoa shall be within 200mm of
9.Minimum Sail Cloth Weights
Minimum sail cloth weights shall be defined, in the case of woven materials,
as the weight of the finished coated woven material used in the sail and, in the
case of substrate/film laminate, as the weight of the finished fabric, including
substrate, film and adhesive, used in the sail. Each sail shall be indelibly
stamped near the head by the sailmaker with the following:
I certify that this sail has been manufactured to comply with the J/24
Class Rules, and only fabrics in accordance with Rule 3.6.2 have been
used. In accordance with Rule 3.6.9, the minimum weight of any part of
this sail is not less than grams per square meter.
Minimum Cloth weights for class sails shall be as follows:
MAINSAIL minimum cloth weight shall be 260 grams per square meter, except
for a foot shelf not exceeding 300mm in width.
JIB minimum cloth weight shall be 260 grams per square meter.
GENOA minimum cloth weight shall be 200 grams per square meter of woven
material; 138 grams per square meter of substrate/film laminate, and genoas
shall not weigh less than 6.5 kg weighed dry without sailbag or any rigging. No
abnormal distribution of sail materials, or abnormal components shall be used
to increse the weight of the sail to satisfy this rule.
SPINNAKER minimum cloth weight shall be 40 grams per square meter.
a) The headboard may be of any material with a maximum width of 115mm
and shall not extend more than 150mm aft of the head when measured at
right angles to the luff.
b) The length of the leech shall not exceed 9170mm.
c) The cross width measurements shall be taken from the three-quarter, half
and quarter points on the leech, located when the head is folded to the clew
for the half-height point, and when the head and clew are folded to the
half-height point to determine the three-quarter height points.
d) The maximum three-quarter height width between the leech and the
nearest point on the luff, including the luff rope, shall be not more than
e) The maximum half-height-width between the leech and the nearest point on
the luff, including the luff rope, shall be not more than 1980mm.
f) The maximum quarter height width between the leech and the nearest point
on the luff, including the luff rope, shall be not more than 2600mm.
g) The sail shall have four battens. The top batten shall be not more than
610mm in length; the intermediate battens shall be not more than 990mm in
length; and the bottom batten shall be not more than 740mm in length. The
maximum width of the battens shall be not more than 50mm.
h) The distance from the head and clew to the intersection of the aft edge of
the sail with the centerline.
4.SAFETY RULES WHEN RACING
1.The following equipment shall be carried on board:
1.One securely fixed 12 volt battery weighing not less than 8kg or more than
2.Permanently installed navigation lights in working order.
3.At least one fixed marine type compass of magnetic card or digital readout
type capable only of instantaneous readout. (Compasses capable of
displaying stored headings and/or performing calculations for storage of
tactical information shall be not allowed.)
4.One fog horn.
5.One water resistant flashlight.
6.Fire extinguisher (s): type and capacity required by local regulations.
7.Life jackets or personal buoyancy equipment for each member of the crew.
8.A minimum of one throw able lifesaving device and drogue on deck within
reach of the helmsman and ready for instant use.
9.Equipment capable of disconnecting and severing the standing rigging.
10.One marine first aid kit and manual.
2.For local and national events, the notice of race and sailing instructions may
prescribe additional safety equipment.
3.Anchor(s), outboard motor, battery and fuel container shall be secured against
movement in the event of a capsize.
1.The crew shall consist of not less than three persons and total crew weight (in swim
wear) shall not exceed 400kg at weigh-in prior to the start of a regatta. A crew
nominated or listed for a regatta or a series of races held over consecutive days
including any lay day, shall remain the same throughout the event unless
substitution is authorized by the race committee.
1.The following are permitted when racing:
1.Barber haulers for the Jib and Genoa restricted as follows:
a) Fittings fixed to the deck shall not exceed one pad eye with or without
attached block, mounted not less than 250mm outboard of each of the four
headsail tracks, plus a total of two cleats.
b) Tackle shall be limited to a single part of rope which may be attached to the
headsail sheet by a block, hook or cringle between the sail and track mounted
c) The Barber haul rope may be led to a pad eye described in 6.1.1(a) or a
stanchion base and/or through standard turning blocks and trimmed to a cleat
or halyard/sheet winch.
2.Two secondary winches with a power ratio not exceeding 8:1 and not
exceeding 67mm in diameter. These may be used to sheet the tails of all
3.One twin headstay luff groove device not exceeding 30mm in width.
4.a) The type and location of deck blocks and cleats for halyards, mainsail, jib
and spinnaker sheets, backstay, Cunningham's, outhaul, leech tensioning,
spinnaker boom topping lift, foreguy and reefing equipment is optional.
b) To increase the purchase of the sheet of the 100 per cent jib the sheet may
be led through the clew cringles and be fixed to any permitted deck fitting.
5.One mechanical masthead wind indicator with or without light.
6.Additional strengthening material or devices on spreaders and/or spreader
brackets to prevent movement while racing.
7.One storm trysail of maximum area 4.40m2 and/or a storm jib whose luff shall
not exceed 5.20m length and of area not exceeding 3.20m2. The cloth weight
shall be not less than 270g/m2.
8.Spare wood tiller and tiller extension of any material, a measured rudder and
9.Electronic devices to record, measure and calculate average speed, and to
indicate distance and water depth.
10.Radio direction finder.
11.A two way radio and antennae.
12.Additional lockers, bookshelves or personalized accommodation equipment in
accordance with Rule 3.2.8(d).
13.Additional safety devices and equipment to owner's requirements or to comply
with local regulations.
14.One spinnaker sheet Barber hauler may be fitted port and starboard, each
consisting of a fairlead or block with accompanying cleat.
15.A fixed block with integral cleat(s) of any type may be installed on a base
platform located either fore or aft of the center of the mainsheet traveller and
at the same height.
16.The genoa sheet may be led port and starboard through an additional fairlead
or block fitted to the deck or on the aft tracks.
17.A second mainsail leech tensioning device (or outhaul control) of synthetic
rope of not more than 4:1 power ratio.
18.Foot rests each attached to only one fixing point on the mainsheet traveller
beam and foot blocks located on the cockpit sole and port and starboard
cockpit decks and foredeck.
19.One boom topping lift of wire, not less than 2mm diameter and/or rope of
6mm diameter fixed to the masthead crane.
20.Anchor, navigation (steaming) light, or deck lights installed on the mast.
21.Tack horns for headsails and mainsail.
22.Watertight inspection ports, not exceeding 102mm inside diameter may be
fitted to the cabin top and cabin liner directly above the lifting beam. Ports shall
be closed when racing.
23.Foam or plastic cushions may be fitted to the upper and/or lower lifelines.
24.Up to 4 berths cushions not exceeding a total weight of 21 kg.
25.A companionway step box or ice box between the bunks on the cabin sole
with an empty weight not exceeding 9 kg.
26.Separate container(s) with no more than 10 liters of fresh water.
1.The following are not permitted:
2.Running backstays or devices to simulate such.
3.Wire strop for the backstay.
4.Halyard locks or hook up devices.
5.The use of a foresail halyard or mechanically adjustable device to vary the
measured length of the forestay.
6.The use of any installed genoa and jib roller furling equipment when racing.
7.Spinnaker guy struts.
8.Stowage of the spinnaker pole on the main boom.
9.Spinnaker chutes through the deck.
10.Not in use.
11.A wire strop or the use of wire in the mainsheet control system.
12.Bushed or unbushed holes or slots to feed halyards or control lines through
the deck, hull or transom.
13.Any equipment or device to feed halyards or control lines below deck.
14.Except as permitted under Rule 6.1.2, quick throw devices, levers, tackle
boxes or other equipment that may increase the power ratio of the running
15.Double luff or double luff tape sails.
16."Angling" of headsail tracks which are approximately parallel as provided
17.Not in use.
18.The use of titanium. The use of other exotic materials that are not
commercially manufactured and readily available, on the open market, at
prices competitive with similar fittings and equipment manufactured with
19.The use of elastic (shock) cord to adjust the standing or running rigging.
2.Other than specified in Rule 6.1.1 the trimming of genoa or jib sheets by means
other than by a sheet from the clew directly to the fixed block fastened by plunger pin
or screw pin to headsail tracks or from optional deck eye (see Rule 6.1.4(b)) first,
then through the clew on the 100 percent jib.
8.RESTRICTIONS WHEN RACING
1.The following practices are not permitted when racing:
1.The use of more than one mainsail, one genoa, one jib and one spinnaker, or
the alteration thereof, during a regatta. Damaged sails may be repaired or
replaced at the discretion of the Race Committee. In addition, one storm
trysail and/or one storm jib as described by Rule 6.1.7 may be carried.
2.The stowage of equipment or gear other than unbagged sails in use on the
cabin sole over the keel.
3.Use of other than normal sailing gear in normal, designed and proper storage
areas to attain sailing weight.
4.The adjustment of standing rigging including all turnbuckles and the ability to
adjust the position of the mast heel by any method. The connection to the
mast heel of any adjustment device or equipment.
5.Use of LORAN, GPS, or similar position fixing devices.
2.Notwithstanding the provisions of Racing Rules of Sailing 42, 42.3 or 49, the
following actions are prohibited at all times:
1.Sudden movement of the body forward or aft (ooching).
2.The repeated pumping of the headsail, mainsail, or any trim of the spinnaker
halyard or guy to promote surfing or acceleration of the yacht. However, a
single, even rapid trim of the headsail or spinnaker sheets and/or the
mainsheet shall be permitted, provided the frequency of trim is not greater
than that of waves passing under the yacht. All parts of the mainsheet may be
3.Hanging on the mast or shrouds to promote roll tacking or gybing.
3.No member of the crew shall station any part of his/her torso outside the upper
lifeline other than temporarily, notwithstanding the provisions of Racing Rules of
4.The location of items for which specific measurements are listed under Part D of the
Measurement Form shall not be changed during a regatta, which is defined as a
series of races held over consecutive days including any lay day. This includes mast
at the deck, spreader sweep, forestay length, height of forestay attachment and
other items listed. The rudder shall not be removed.
9.RULES GOVERNING CONTINENTAL AND WORLD CHAMPIONSHIPS
1.The International Jury shall consist of a chairman and four other members. The jury
shall be comprised of members of at least three nationalities.
1.The chief judge and two of the jurors shall be approved by the IJCA Executive
2.The measurers shall be appointed by the host NJCA, approved by the IJCA
Executive and Technical Committees and shall have the authority for the dis-position
of Class Rule protests relating to measurement.