International
One Design
 Certificate
2024

Boat

J 24 ONE DESIGN

MNA-1234

Rated boat velocities in knots
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Beat Angles43.4°41.5°39.7°38.4°38.1°38.3°39.5°42.6°
Beat VMG3.073.674.094.334.404.424.374.16
52°4.675.435.826.046.146.186.216.14
60°4.915.615.966.176.316.376.456.43
75°5.055.706.066.326.546.696.866.94
90°4.965.676.136.446.636.877.247.49
110°4.855.726.206.606.977.327.948.56
120°4.705.606.116.516.907.328.6010.03
135°4.225.145.836.246.627.018.1311.09
150°3.554.535.335.916.286.637.409.22
Run VMG3.083.924.655.315.826.176.837.99
Gybe Angles146.8°151.4°154.6°168.2°178.1°178.6°178.6°138.8°
APH ToD:651.1CDL: 6.491APH ToT: 0.9216CertNo:J24
BOAT
ClassJ-24DesignerJOHNSTONEBuilderJ-BOATSAge dateSeries date01/1977Offset fileJ24.OD.offData filej24
HULL
Length Overall7.318 mMaximum Beam2.692 mDraft1.225 mDisplacement1,269 kgDLR5.6329IMS DivisionSportboatDynamic Allowance0.000%Age Allowance0.487%
PROPELLER
InstallationNo PropellerTypeN/ADiameterN/A
CREW
Maximum weight400 kg(declared)Minimum weight270 kg * when appliedNon Manual PowerNoCrew Arm Extension-0.20 m
SAIL AREAS (m²)
MeasuredRatedMainsail15.6616.03Headsail Luffed18.7818.78Headsail FlyingSymmetric35.3435.34Asymmetric
STORM SAIL AREAS (m²)
Trysail4.44Storm Jib3.37Heavy Weather Jib9.08
SAIL LIMITS
Headsails5  Spinnakers4
STABILITY
Righting Moment27.0 kg·mStability Index93.1
The owner and any other person in charge is responsible that boat is complying with her certificate in accordance with RRS 78.1 and ORC Rule 304.
ORC Ref  02920002U2TIssued on 11/01/2024Valid until 31/12/2024
VPP ver: 2024 1.00 | © ORC | www.orc.org

International
One Design
 Certificate
2024

Boat

J 24 ONE DESIGN

MNA-1234

Time Allowances in secs/NM
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Beat VMG1172.6979.9881.3831.3817.8814.1824.7865.8
52°771.3663.5618.1596.1586.6582.4579.6586.7
60°733.6641.4604.4583.2570.5564.8557.9560.0
75°713.5631.1593.8569.2550.5538.2525.1518.8
90°725.5634.4587.0559.3542.6523.7497.1480.7
110°741.9629.6580.7545.5516.8491.6453.5420.5
120°765.4642.7589.2553.2521.6491.6418.6358.8
135°853.3700.8617.0576.7543.5513.4442.8324.6
150°1013.9795.3674.8609.5573.5542.9486.2390.3
Run VMG1170.7917.4774.9678.6619.0583.4526.8450.6
Selected Courses
Windward / Leeward1171.7948.6828.1755.0718.4698.7675.8658.2
All purpose902.3750.9673.6628.9604.3586.4558.9532.5
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward792.90.7567
All purpose651.10.9216
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low826.60.7259
Triple Number Coastal/Long Distance Medium647.80.9262
Triple Number Coastal/Long Distance High580.61.0335
Triple Number Windward/Leeward Low1060.10.5660
Triple Number Windward/Leeward Medium786.40.7630
Triple Number Windward/Leeward High695.00.8633
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance706.30.8496
Triple Number Coastal/Long Distance Low826.60.7259
Triple Number Coastal/Long Distance Medium647.80.9262
Triple Number Coastal/Long Distance High580.61.0335
Triple Number Windward/Leeward Low1060.10.5660
Triple Number Windward/Leeward Medium786.40.7630
Triple Number Windward/Leeward High695.00.8633
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1171.6894.6752.4669.0626.8592.4527.3496.5
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6644
Downwind "popa"0.7968
70% up, 30% down "Ilhabela"0.6992
30% up, 70% down "Ilhabela-inverso"0.7519
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low826.60.7259
Triple Number Coastal/Long Distance Medium647.80.9262
Triple Number Coastal/Long Distance High580.61.0335
Triple Number Windward/Leeward Low1060.10.5660
Triple Number Windward/Leeward Medium786.40.7630
Triple Number Windward/Leeward High695.00.8633
Predominantly Upwind702.10.8546
Predominantly Downwind662.50.9056
Custom scoring options for Canada
Scoring OptionTODTOT
Predominant Upwind700.30.8567
Predominant Reaching636.60.9424
Predominant Downwind636.60.9424
Predominant Upwind - Low900.00.6667
Predominant Upwind - Low/Med763.50.7859
Predominant Upwind - Medium680.90.8812
Predominant Upwind - Med/High642.40.9340
Predominant Upwind - High627.80.9558
Predominant Reaching Low810.90.7399
Predominant Reaching Low/Med688.00.8721
Predominant Reaching Medium609.70.9840
Predominant Reaching Med/High560.51.0704
Predominant Reaching High524.21.1447
Predominant Downwind Low810.90.7399
Predominant Downwind Low/Med748.80.8013
Predominant Downwind Medium639.90.9376
Predominant Downwind Med/High570.61.0515
Predominant Downwind High520.41.1529
Harvest Moon Regatta565.91.0602
Chicago-Mac Upwind0.8397
Chicago-Mac All Purpose0.8629
Chicago-Mac Downwind0.8905
Bayview-Mac Cove Island0.8067
Bayview-Mac Shore0.8145
Scoring OptionTODTOT
5-Band Windward/Leeward Low1121.10.5352
5-Band Windward/Leeward Low/Med910.40.6591
5-Band Windward/Leeward Medium772.60.7766
5-Band Windward/Leeward Med/High702.90.8536
5-Band Windward/Leeward High676.70.8867
Triple Number Windward/Leeward Low1060.10.5660
Triple Number Windward/Leeward Medium786.40.7630
Triple Number Windward/Leeward High695.00.8633
Windward/Leeward 60-40 Low1122.60.5345
Windward/Leeward 60-40 Low/Med918.60.6532
Windward/Leeward 60-40 Medium787.70.7617
Windward/Leeward 60-40 Med/High725.90.8266
Windward/Leeward 60-40 High707.40.8482
5-Band AP Low867.90.6913
5-Band AP Low/Med728.00.8242
5-Band AP Medium638.90.9391
5-Band AP Med/High588.41.0198
5-Band AP High559.11.0732
Triple Number AP Low826.60.7259
Triple Number AP Medium647.90.9261
Triple Number AP High580.61.0335
5-Band SF Bay Tour - Low1063.80.5640
5-Band SF Bay Tour - Low/Med871.70.6883
5-Band SF Bay Tour - Medium749.20.8009
5-Band SF Bay Tour - Med/High687.80.8724
5-Band SF Bay Tour - High661.20.9074
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance706.30.8496
Triple Number Coastal/Long Distance Low826.60.7259
Triple Number Coastal/Long Distance Medium647.80.9262
Triple Number Coastal/Long Distance High580.61.0335
Triple Number Windward/Leeward Low1060.10.5660
Triple Number Windward/Leeward Medium786.40.7630
Triple Number Windward/Leeward High695.00.8633
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1171.6894.6752.4669.0626.8592.4527.3496.5
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance706.30.8496
Triple Number Coastal/Long Distance Low826.60.7259
Triple Number Coastal/Long Distance Medium647.80.9262
Triple Number Coastal/Long Distance High580.61.0335
Triple Number Windward/Leeward Low1060.10.5660
Triple Number Windward/Leeward Medium786.40.7630
Triple Number Windward/Leeward High695.00.8633
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1171.6894.6752.4669.0626.8592.4527.3496.5
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance706.3
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1171.6894.6752.4669.0626.8592.4527.3496.5
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low826.60.7259
Triple Number Coastal/Long Distance Medium647.80.9262
Triple Number Coastal/Long Distance High580.61.0335
Triple Number Windward/Leeward Low1060.10.5660
Triple Number Windward/Leeward Medium786.40.7630
Triple Number Windward/Leeward High695.00.8633
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating (Coastal/Long Distance)706.30.8496
Triple Number Coastal/Long Distance Low826.60.7259
Triple Number Coastal/Long Distance Medium647.80.9262
Triple Number Coastal/Long Distance High580.61.0335
Triple Number Windward/Leeward Low1060.10.5660
Triple Number Windward/Leeward Medium786.40.7630
Triple Number Windward/Leeward High695.00.8633
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1171.6894.6752.4669.0626.8592.4527.3496.5
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low826.60.7259
Triple Number Coastal/Long Distance Medium647.80.9262
Triple Number Coastal/Long Distance High580.61.0335
Triple Number Windward/Leeward Low1060.10.5660
Triple Number Windward/Leeward Medium786.40.7630
Triple Number Windward/Leeward High695.00.8633
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7259
Triple Number Coastal/Long Distance Medium0.9262
Triple Number Coastal/Long Distance High1.0335
Triple Number Windward/Leeward Low0.5660
Triple Number Windward/Leeward Medium0.7630
Triple Number Windward/Leeward High0.8633
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1171.6894.6752.4669.0626.8592.4527.3496.5
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance706.30.8496
Triple Number Coastal/Long Distance Low826.60.7259
Triple Number Coastal/Long Distance Medium647.80.9262
Triple Number Coastal/Long Distance High580.61.0335
Triple Number Windward/Leeward Low1060.10.5660
Triple Number Windward/Leeward Medium786.40.7630
Triple Number Windward/Leeward High695.00.8633
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1171.6894.6752.4669.0626.8592.4527.3496.5
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low826.60.7259
Triple Number Coastal/Long Distance Medium647.80.9262
Triple Number Coastal/Long Distance High580.61.0335
Triple Number Windward/Leeward Low1060.10.5660
Triple Number Windward/Leeward Medium786.40.7630
Triple Number Windward/Leeward High695.00.8633
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance706.30.8496
Triple Number Coastal/Long Distance Low826.60.7259
Triple Number Coastal/Long Distance Medium647.80.9262
Triple Number Coastal/Long Distance High580.61.0335
Triple Number Windward/Leeward Low1060.10.5660
Triple Number Windward/Leeward Medium786.40.7630
Triple Number Windward/Leeward High695.00.8633
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1171.6894.6752.4669.0626.8592.4527.3496.5
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance706.30.8496
Triple Number Coastal/Long Distance Low826.60.7259
Triple Number Coastal/Long Distance Medium647.80.9262
Triple Number Coastal/Long Distance High580.61.0335
Triple Number Windward/Leeward Low1060.10.5660
Triple Number Windward/Leeward Medium786.40.7630
Triple Number Windward/Leeward High695.00.8633
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1171.6894.6752.4669.0626.8592.4527.3496.5
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low826.6
Triple Number Coastal/Long Distance Medium647.8
Triple Number Coastal/Long Distance High580.6
Triple Number Windward/Leeward Low1060.1
Triple Number Windward/Leeward Medium786.4
Triple Number Windward/Leeward High695.0
Predominantly Upwind702.1
Predominantly Downwind662.5
Predominantly Reaching636.6
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance706.30.8496
Triple Number Coastal/Long Distance Low826.60.7259
Triple Number Coastal/Long Distance Medium647.80.9262
Triple Number Coastal/Long Distance High580.61.0335
Triple Number Windward/Leeward Low1060.10.5660
Triple Number Windward/Leeward Medium786.40.7630
Triple Number Windward/Leeward High695.00.8633
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1171.6894.6752.4669.0626.8592.4527.3496.5
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7259
Triple Number Coastal/Long Distance Medium0.9262
Triple Number Coastal/Long Distance High1.0335
Triple Number Windward/Leeward Low0.5660
Triple Number Windward/Leeward Medium0.7630
Triple Number Windward/Leeward High0.8633
Coastal/Long Distance0.8496
Predominantly Upwind0.8546
Predominantly Downwind0.9056
For information
General Purpose Handicap (GPH)728.5
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.7259
Tretall Distanseseilas Mellomvind0.9262
Tretall Distanseseilas Mye vind1.0335
Tretall Pølsebane Lite vind0.5660
Tretall Pølsebane Mellomvind0.7630
Tretall Pølsebane Mye vind0.8633
Distanseseilas ett tall (OSN 8-16kn)0.8496
Distanseseilas ett tall (APH 6-20kn)0.9216
Enkeltall Motvind0.8546
Enkeltall Medvind0.9056
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low826.60.7259
Triple Number Coastal/Long Distance Medium647.80.9262
Triple Number Coastal/Long Distance High580.61.0335
Triple Number Windward/Leeward Low1060.10.5660
Triple Number Windward/Leeward Medium786.40.7630
Triple Number Windward/Leeward High695.00.8633
Coastal/Long Distance706.30.8496
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind702.10.8546
Predominantly Downwind662.50.9056
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore663.50.9043
Cape Doctor Coastal540.41.1102
Triple Number Coastal/Long Distance Low826.60.7259
Triple Number Coastal/Long Distance Medium647.80.9262
Triple Number Coastal/Long Distance High580.61.0335
Triple Number Windward/Leeward Low1060.10.5660
Triple Number Windward/Leeward Medium786.40.7630
Triple Number Windward/Leeward High695.00.8633
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7259
Triple Number Coastal/Long Distance Medium0.9262
Triple Number Coastal/Long Distance High1.0335
Triple Number Windward/Leeward Low0.5660
Triple Number Windward/Leeward Medium0.7630
Triple Number Windward/Leeward High0.8633
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7259
Triple Number Coastal/Long Distance Medium0.9262
Triple Number Coastal/Long Distance High1.0335
Triple Number Windward/Leeward Low0.5660
Triple Number Windward/Leeward Medium0.7630
Triple Number Windward/Leeward High0.8633
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance706.30.8496
Triple Number Coastal/Long Distance Low826.60.7259
Triple Number Coastal/Long Distance Medium647.80.9262
Triple Number Coastal/Long Distance High580.61.0335
Triple Number Windward/Leeward Low1060.10.5660
Triple Number Windward/Leeward Medium786.40.7630
Triple Number Windward/Leeward High695.00.8633
Predominantly Upwind702.10.8546
Predominantly Downwind662.50.9056
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1171.6894.6752.4669.0626.8592.4527.3496.5
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance706.30.8496
Triple Number Coastal/Long Distance Low826.60.7259
Triple Number Coastal/Long Distance Medium647.80.9262
Triple Number Coastal/Long Distance High580.61.0335
Triple Number Windward/Leeward Low1060.10.5660
Triple Number Windward/Leeward Medium786.40.7630
Triple Number Windward/Leeward High695.00.8633
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1171.6894.6752.4669.0626.8592.4527.3496.5
Custom scoring options for United States of America
Scoring OptionTODTOT
Predominant Upwind700.30.8567
Predominant Reaching636.60.9424
Predominant Downwind636.60.9424
Predominant Upwind - Low900.00.6667
Predominant Upwind - Low/Med763.50.7859
Predominant Upwind - Medium680.90.8812
Predominant Upwind - Med/High642.40.9340
Predominant Upwind - High627.80.9558
Predominant Reaching Low810.90.7399
Predominant Reaching Low/Med688.00.8721
Predominant Reaching Medium609.70.9840
Predominant Reaching Med/High560.51.0704
Predominant Reaching High524.21.1447
Predominant Downwind Low810.90.7399
Predominant Downwind Low/Med748.80.8013
Predominant Downwind Medium639.90.9376
Predominant Downwind Med/High570.61.0515
Predominant Downwind High520.41.1529
Harvest Moon Regatta565.91.0602
Chicago-Mac Upwind0.8397
Chicago-Mac All Purpose0.8629
Chicago-Mac Downwind0.8905
Bayview-Mac Cove Island0.8067
Bayview-Mac Shore0.8145
Scoring OptionTODTOT
5-Band Windward/Leeward Low1121.10.5352
5-Band Windward/Leeward Low/Med910.40.6591
5-Band Windward/Leeward Medium772.60.7766
5-Band Windward/Leeward Med/High702.90.8536
5-Band Windward/Leeward High676.70.8867
Triple Number Windward/Leeward Low1060.10.5660
Triple Number Windward/Leeward Medium786.40.7630
Triple Number Windward/Leeward High695.00.8633
Windward/Leeward 60-40 Low1122.60.5345
Windward/Leeward 60-40 Low/Med918.60.6532
Windward/Leeward 60-40 Medium787.70.7617
Windward/Leeward 60-40 Med/High725.90.8266
Windward/Leeward 60-40 High707.40.8482
5-Band AP Low867.90.6913
5-Band AP Low/Med728.00.8242
5-Band AP Medium638.90.9391
5-Band AP Med/High588.41.0198
5-Band AP High559.11.0732
Triple Number AP Low826.60.7259
Triple Number AP Medium647.90.9261
Triple Number AP High580.61.0335
5-Band SF Bay Tour - Low1063.80.5640
5-Band SF Bay Tour - Low/Med871.70.6883
5-Band SF Bay Tour - Medium749.20.8009
5-Band SF Bay Tour - Med/High687.80.8724
5-Band SF Bay Tour - High661.20.9074
ORC Ref  02920002U2TIssued on 11/01/2024Valid until 31/12/2024
VPP ver: 2024 1.00 | © ORC | www.orc.org

International
One Design
 Certificate
2024

Boat

J 24 ONE DESIGN

MNA-1234

Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassJ-24Measurement16/04/2015HINPlan reviewHull constructionSolidCarbon RudderNoLight stanchionsNoTrim tabNo
LOA7.318Max. Beam2.692Draft1.225Displacement1,269Wetted area10.37IMS L6.529LSM06.085Acc. length7.318Sink (kg/mm) 8.53
VCGD0.049VCGM0.076RM Rated (kg·m) 27.0Limit of positive stability(°) 101.2Stability Index93.1Default crew weight339Declared crew weight400
PROPELLER
Propeller TypeNo Propeller
Hydro generatorNo
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunners/Checkstays0Spreaders1Rotating mastNo
P8.538IG8.125ISP8.210MDT10.087MDL10.124MDT20.087MDL20.124TL0.000MW0.124GO0.150
E2.970J2.900BAS1.080FSDSFJSPL2.975WPLTPSBD0.085MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodPoles incliningFlotation Date16/04/2015
SFFP0.286FFM0.808FF0.808LCFcl4.079SG1.0250
SAFP7.317FAM0.699FA0.699LCFsh4.293HBI0.732
W120.0W220.0W320.0W420.0
PD1332.0PD2330.0PD3331.0PD4332.0
WD5.680PLM9000.00GSA1.0RSA1.0RM27.0
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  02920002U2TIssued on 11/01/2024Valid until 31/12/2024
VPP ver: 2024 1.00 | © ORC | www.orc.org

International
One Design
 Certificate
2024

Boat

J 24 ONE DESIGN

MNA-1234

MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentORC0.150.701.181.982.6015.66Class rules
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentORC0.104.358.46NoNo 18.78Class rules
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateCommentORC8.138.138.135.225.2035.34Class rules
ORC Ref  02920002U2TIssued on 11/01/2024Valid until 31/12/2024
VPP ver: 2024 1.00 | © ORC | www.orc.org