International
One Design
Certificate
2024

Boat

J 70

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°41.6°39.4°37.6°37.4°37.5°38.5°40.4°
Beat VMG3.083.774.254.524.594.624.594.48
52°4.695.596.056.336.476.546.606.57
60°4.935.786.216.556.746.856.976.97
75°5.085.896.366.787.167.397.687.80
90°5.386.206.616.887.307.838.548.93
110°5.456.337.017.588.018.449.2910.40
120°5.306.226.937.728.509.1210.3811.77
135°4.785.846.537.218.079.1312.2113.90
150°4.065.145.926.477.027.7810.6613.80
Run VMG3.524.455.125.606.086.749.2311.95
Gybe Angles144.2°148.0°149.5°148.3°145.7°143.6°140.6°145.3°
APH ToD:600.2CDL: 6.881APH ToT: 0.9996CertNo:J-70
BOAT
ClassJ-70 ONE DESIGNDesignerJOHNSTONEBuilderJ BOATSAge date02/2013Series date02/2012Offset filej-70.od.offData filej70
HULL
Length Overall6.942 mMaximum Beam2.260 mDraft1.450 mDisplacement810 kgDLR3.3766IMS DivisionSportboatDynamic Allowance0.000%Age Allowance0.390%
PROPELLER
InstallationNo PropellerTypeN/ADiameterN/A
CREW
Maximum weight340 kg(declared)Minimum weight210 kg * when appliedNon Manual PowerNoCrew Arm ExtensionLoose or no lifelines
SAIL AREAS (m²)
MeasuredRatedMainsail15.4616.12Headsail Luffed10.0010.00Headsail FlyingSymmetricAsymmetric45.6445.64 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail4.02Storm Jib3.39Heavy Weather Jib9.13
SAIL LIMITS
Headsails5 * Woven polyester sails  Spinnakers4
STABILITY
Righting Moment18.5 kg·mStability Index94.5
COMMENTS
weight acc to OD class rules incl outboard engine,
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.

International
One Design
Certificate
2024

Boat

J 70

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 VMG1169.0956.0847.5796.1784.0779.3784.9803.2
52°768.0644.6595.1568.4556.8550.4545.5548.0
60°730.2623.2579.7550.0533.8525.6516.9516.8
75°708.3611.5566.3531.0503.1486.9468.7461.5
90°669.7580.7544.6523.2493.5460.1421.7402.9
110°660.8568.7513.6475.2449.6426.6387.5346.2
120°679.3578.9519.4466.4423.7394.9346.8306.0
135°752.8616.1551.4499.1445.9394.4294.8259.0
150°886.1700.5608.5556.7513.0462.7337.7260.9
Run VMG1023.2808.9702.7642.8592.4534.3389.9301.3
Selected Courses
Windward / Leeward1096.1882.5775.1719.5688.2656.8587.4552.2
All purpose845.3698.2626.4583.7554.6528.5480.3455.5
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward746.60.8037
All purpose600.20.9996
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low771.70.7775
Triple Number Coastal/Long Distance Medium600.20.9997
Triple Number Coastal/Long Distance High517.01.1606
Triple Number Windward/Leeward Low989.30.6065
Triple Number Windward/Leeward Medium743.80.8067
Triple Number Windward/Leeward High638.60.9395
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance652.30.9199
Triple Number Coastal/Long Distance Low771.70.7775
Triple Number Coastal/Long Distance Medium600.20.9997
Triple Number Coastal/Long Distance High517.01.1606
Triple Number Windward/Leeward Low989.30.6065
Triple Number Windward/Leeward Medium743.80.8067
Triple Number Windward/Leeward High638.60.9395
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1088.8830.1701.4623.5576.2531.8451.5422.8
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6866
Downwind "popa"0.8947
70% up, 30% down "Ilhabela"0.7381
30% up, 70% down "Ilhabela-inverso"0.8202
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low771.70.7775
Triple Number Coastal/Long Distance Medium600.20.9997
Triple Number Coastal/Long Distance High517.01.1606
Triple Number Windward/Leeward Low989.30.6065
Triple Number Windward/Leeward Medium743.80.8067
Triple Number Windward/Leeward High638.60.9395
Predominantly Upwind661.10.9076
Predominantly Downwind599.71.0005
Custom scoring options for Canada
Scoring OptionTODTOT
Predominant Upwind659.60.9097
Predominant Reaching577.01.0398
Predominant Downwind577.01.0398
Predominant Upwind - Low865.00.6936
Predominant Upwind - Low/Med725.50.8270
Predominant Upwind - Medium641.60.9352
Predominant Upwind - Med/High593.61.0108
Predominant Upwind - High567.11.0579
Predominant Reaching Low749.70.8003
Predominant Reaching Low/Med635.00.9449
Predominant Reaching Medium558.81.0738
Predominant Reaching Med/High491.51.2207
Predominant Reaching High440.51.3620
Predominant Downwind Low749.70.8003
Predominant Downwind Low/Med681.50.8804
Predominant Downwind Medium584.31.0268
Predominant Downwind Med/High496.61.2082
Predominant Downwind High418.71.4330
Harvest Moon Regatta500.61.1987
Chicago-Mac Upwind0.8911
Chicago-Mac All Purpose0.9339
Chicago-Mac Downwind0.9837
Bayview-Mac Cove Island0.8665
Bayview-Mac Shore0.8701
Scoring OptionTODTOT
5-Band Windward/Leeward Low1047.60.5727
5-Band Windward/Leeward Low/Med852.00.7042
5-Band Windward/Leeward Medium731.90.8198
5-Band Windward/Leeward Med/High655.60.9151
5-Band Windward/Leeward High593.31.0112
Triple Number Windward/Leeward Low989.30.6065
Triple Number Windward/Leeward Medium743.80.8067
Triple Number Windward/Leeward High638.60.9395
Windward/Leeward 60-40 Low1062.20.5648
Windward/Leeward 60-40 Low/Med866.70.6923
Windward/Leeward 60-40 Medium748.40.8017
Windward/Leeward 60-40 Med/High681.00.8811
Windward/Leeward 60-40 High632.10.9492
5-Band AP Low811.90.7390
5-Band AP Low/Med677.60.8855
5-Band AP Medium590.91.0155
5-Band AP Med/High529.41.1333
5-Band AP High484.41.2387
Triple Number AP Low771.70.7775
Triple Number AP Medium600.20.9996
Triple Number AP High517.01.1606
5-Band SF Bay Tour - Low998.90.6007
5-Band SF Bay Tour - Low/Med816.40.7349
5-Band SF Bay Tour - Medium703.40.8530
5-Band SF Bay Tour - Med/High632.80.9481
5-Band SF Bay Tour - High579.61.0352
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance652.30.9199
Triple Number Coastal/Long Distance Low771.70.7775
Triple Number Coastal/Long Distance Medium600.20.9997
Triple Number Coastal/Long Distance High517.01.1606
Triple Number Windward/Leeward Low989.30.6065
Triple Number Windward/Leeward Medium743.80.8067
Triple Number Windward/Leeward High638.60.9395
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1088.8830.1701.4623.5576.2531.8451.5422.8
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance652.30.9199
Triple Number Coastal/Long Distance Low771.70.7775
Triple Number Coastal/Long Distance Medium600.20.9997
Triple Number Coastal/Long Distance High517.01.1606
Triple Number Windward/Leeward Low989.30.6065
Triple Number Windward/Leeward Medium743.80.8067
Triple Number Windward/Leeward High638.60.9395
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1088.8830.1701.4623.5576.2531.8451.5422.8
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance652.3
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1088.8830.1701.4623.5576.2531.8451.5422.8
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low771.70.7775
Triple Number Coastal/Long Distance Medium600.20.9997
Triple Number Coastal/Long Distance High517.01.1606
Triple Number Windward/Leeward Low989.30.6065
Triple Number Windward/Leeward Medium743.80.8067
Triple Number Windward/Leeward High638.60.9395
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating (Coastal/Long Distance)652.30.9199
Triple Number Coastal/Long Distance Low771.70.7775
Triple Number Coastal/Long Distance Medium600.20.9997
Triple Number Coastal/Long Distance High517.01.1606
Triple Number Windward/Leeward Low989.30.6065
Triple Number Windward/Leeward Medium743.80.8067
Triple Number Windward/Leeward High638.60.9395
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1088.8830.1701.4623.5576.2531.8451.5422.8
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low771.70.7775
Triple Number Coastal/Long Distance Medium600.20.9997
Triple Number Coastal/Long Distance High517.01.1606
Triple Number Windward/Leeward Low989.30.6065
Triple Number Windward/Leeward Medium743.80.8067
Triple Number Windward/Leeward High638.60.9395
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7775
Triple Number Coastal/Long Distance Medium0.9997
Triple Number Coastal/Long Distance High1.1606
Triple Number Windward/Leeward Low0.6065
Triple Number Windward/Leeward Medium0.8067
Triple Number Windward/Leeward High0.9395
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1088.8830.1701.4623.5576.2531.8451.5422.8
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance652.30.9199
Triple Number Coastal/Long Distance Low771.70.7775
Triple Number Coastal/Long Distance Medium600.20.9997
Triple Number Coastal/Long Distance High517.01.1606
Triple Number Windward/Leeward Low989.30.6065
Triple Number Windward/Leeward Medium743.80.8067
Triple Number Windward/Leeward High638.60.9395
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1088.8830.1701.4623.5576.2531.8451.5422.8
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low771.70.7775
Triple Number Coastal/Long Distance Medium600.20.9997
Triple Number Coastal/Long Distance High517.01.1606
Triple Number Windward/Leeward Low989.30.6065
Triple Number Windward/Leeward Medium743.80.8067
Triple Number Windward/Leeward High638.60.9395
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance652.30.9199
Triple Number Coastal/Long Distance Low771.70.7775
Triple Number Coastal/Long Distance Medium600.20.9997
Triple Number Coastal/Long Distance High517.01.1606
Triple Number Windward/Leeward Low989.30.6065
Triple Number Windward/Leeward Medium743.80.8067
Triple Number Windward/Leeward High638.60.9395
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1088.8830.1701.4623.5576.2531.8451.5422.8
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance652.30.9199
Triple Number Coastal/Long Distance Low771.70.7775
Triple Number Coastal/Long Distance Medium600.20.9997
Triple Number Coastal/Long Distance High517.01.1606
Triple Number Windward/Leeward Low989.30.6065
Triple Number Windward/Leeward Medium743.80.8067
Triple Number Windward/Leeward High638.60.9395
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1088.8830.1701.4623.5576.2531.8451.5422.8
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low771.7
Triple Number Coastal/Long Distance Medium600.2
Triple Number Coastal/Long Distance High517.0
Triple Number Windward/Leeward Low989.3
Triple Number Windward/Leeward Medium743.8
Triple Number Windward/Leeward High638.6
Predominantly Upwind661.1
Predominantly Downwind599.7
Predominantly Reaching577.0
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance652.30.9199
Triple Number Coastal/Long Distance Low771.70.7775
Triple Number Coastal/Long Distance Medium600.20.9997
Triple Number Coastal/Long Distance High517.01.1606
Triple Number Windward/Leeward Low989.30.6065
Triple Number Windward/Leeward Medium743.80.8067
Triple Number Windward/Leeward High638.60.9395
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1088.8830.1701.4623.5576.2531.8451.5422.8
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7775
Triple Number Coastal/Long Distance Medium0.9997
Triple Number Coastal/Long Distance High1.1606
Triple Number Windward/Leeward Low0.6065
Triple Number Windward/Leeward Medium0.8067
Triple Number Windward/Leeward High0.9395
Coastal/Long Distance0.9199
Predominantly Upwind0.9076
Predominantly Downwind1.0005
For information
General Purpose Handicap (GPH)674.2
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.7775
Tretall Distanseseilas Mellomvind0.9997
Tretall Distanseseilas Mye vind1.1606
Tretall Pølsebane Lite vind0.6065
Tretall Pølsebane Mellomvind0.8067
Tretall Pølsebane Mye vind0.9395
Distanseseilas ett tall (OSN 8-16kn)0.9199
Distanseseilas ett tall (APH 6-20kn)0.9996
Enkeltall Motvind0.9076
Enkeltall Medvind1.0005
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low771.70.7775
Triple Number Coastal/Long Distance Medium600.20.9997
Triple Number Coastal/Long Distance High517.01.1606
Triple Number Windward/Leeward Low989.30.6065
Triple Number Windward/Leeward Medium743.80.8067
Triple Number Windward/Leeward High638.60.9395
Coastal/Long Distance652.30.9199
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind661.10.9076
Predominantly Downwind599.71.0005
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore562.81.0661
Cape Doctor Coastal463.01.2960
Triple Number Coastal/Long Distance Low771.70.7775
Triple Number Coastal/Long Distance Medium600.20.9997
Triple Number Coastal/Long Distance High517.01.1606
Triple Number Windward/Leeward Low989.30.6065
Triple Number Windward/Leeward Medium743.80.8067
Triple Number Windward/Leeward High638.60.9395
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7775
Triple Number Coastal/Long Distance Medium0.9997
Triple Number Coastal/Long Distance High1.1606
Triple Number Windward/Leeward Low0.6065
Triple Number Windward/Leeward Medium0.8067
Triple Number Windward/Leeward High0.9395
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7775
Triple Number Coastal/Long Distance Medium0.9997
Triple Number Coastal/Long Distance High1.1606
Triple Number Windward/Leeward Low0.6065
Triple Number Windward/Leeward Medium0.8067
Triple Number Windward/Leeward High0.9395
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance652.30.9199
Triple Number Coastal/Long Distance Low771.70.7775
Triple Number Coastal/Long Distance Medium600.20.9997
Triple Number Coastal/Long Distance High517.01.1606
Triple Number Windward/Leeward Low989.30.6065
Triple Number Windward/Leeward Medium743.80.8067
Triple Number Windward/Leeward High638.60.9395
Predominantly Upwind661.10.9076
Predominantly Downwind599.71.0005
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1088.8830.1701.4623.5576.2531.8451.5422.8
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance652.30.9199
Triple Number Coastal/Long Distance Low771.70.7775
Triple Number Coastal/Long Distance Medium600.20.9997
Triple Number Coastal/Long Distance High517.01.1606
Triple Number Windward/Leeward Low989.30.6065
Triple Number Windward/Leeward Medium743.80.8067
Triple Number Windward/Leeward High638.60.9395
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1088.8830.1701.4623.5576.2531.8451.5422.8
Custom scoring options for United States of America
Scoring OptionTODTOT
Predominant Upwind659.60.9097
Predominant Reaching577.01.0398
Predominant Downwind577.01.0398
Predominant Upwind - Low865.00.6936
Predominant Upwind - Low/Med725.50.8270
Predominant Upwind - Medium641.60.9352
Predominant Upwind - Med/High593.61.0108
Predominant Upwind - High567.11.0579
Predominant Reaching Low749.70.8003
Predominant Reaching Low/Med635.00.9449
Predominant Reaching Medium558.81.0738
Predominant Reaching Med/High491.51.2207
Predominant Reaching High440.51.3620
Predominant Downwind Low749.70.8003
Predominant Downwind Low/Med681.50.8804
Predominant Downwind Medium584.31.0268
Predominant Downwind Med/High496.61.2082
Predominant Downwind High418.71.4330
Harvest Moon Regatta500.61.1987
Chicago-Mac Upwind0.8911
Chicago-Mac All Purpose0.9339
Chicago-Mac Downwind0.9837
Bayview-Mac Cove Island0.8665
Bayview-Mac Shore0.8701
Scoring OptionTODTOT
5-Band Windward/Leeward Low1047.60.5727
5-Band Windward/Leeward Low/Med852.00.7042
5-Band Windward/Leeward Medium731.90.8198
5-Band Windward/Leeward Med/High655.60.9151
5-Band Windward/Leeward High593.31.0112
Triple Number Windward/Leeward Low989.30.6065
Triple Number Windward/Leeward Medium743.80.8067
Triple Number Windward/Leeward High638.60.9395
Windward/Leeward 60-40 Low1062.20.5648
Windward/Leeward 60-40 Low/Med866.70.6923
Windward/Leeward 60-40 Medium748.40.8017
Windward/Leeward 60-40 Med/High681.00.8811
Windward/Leeward 60-40 High632.10.9492
5-Band AP Low811.90.7390
5-Band AP Low/Med677.60.8855
5-Band AP Medium590.91.0155
5-Band AP Med/High529.41.1333
5-Band AP High484.41.2387
Triple Number AP Low771.70.7775
Triple Number AP Medium600.20.9996
Triple Number AP High517.01.1606
5-Band SF Bay Tour - Low998.90.6007
5-Band SF Bay Tour - Low/Med816.40.7349
5-Band SF Bay Tour - Medium703.40.8530
5-Band SF Bay Tour - Med/High632.80.9481
5-Band SF Bay Tour - High579.61.0352

International
One Design
Certificate
2024

Boat

J 70

MNA-1234

Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassJ-70 ONE DESIGNMeasurement01/02/2013HINPlan reviewHull constructionCoredCarbon RudderNoLight stanchionsNoTrim tabNo
LOA6.942Max. Beam2.260Draft1.450Displacement810Wetted area9.15IMS L6.725LSM06.214Acc. length6.942Sink (kg/mm) 7.48
VCGD-0.038VCGM-0.041RM Rated (kg·m) 18.5Limit of positive stability(°) 103.2Stability Index94.5Default crew weight349Declared crew weight340
PROPELLER
Propeller TypeNo Propeller
Hydro generatorNo
RIG
Forestay tensionAftInner stayNone FittedMast materialCarbonSingle headsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunners/Checkstays0Spreaders1Rotating mastNo
P7.975IG8.153ISP9.412MDT10.076MDL10.131MDT20.070MDL20.070TL1.000MW0.116GO0.136
E2.876J2.340BAS1.145FSD0.000SFJ0.175SPLWPLTPS4.025BD0.095MWT24.00MCG3.880
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodPoles incliningFlotation Date01/02/2016MeasurerClass rules weight
SFFP0.147FFM0.792FF0.793LCFcl3.696SG1.0190
SAFP6.895FAM0.577FA0.578LCFsh3.858HBI0.678
W118.0W218.0W318.0W418.0
PD1601.1PD2600.9PD3602.2PD4603.0
WD7.870PLM9000.00GSA1.0RSA1.0RM18.5
BALLAST
TANKS
INVENTORY
IdDescriptionWeight SailingLCGVCGGAIdDescriptionWeight SailingLCGVCGGAE OUTBOARD MIN.10kg   
INVENTORY
Fixed Ballast Total0
Total deductible
OTHER ITEMSIdKindDescriptionWeightLCGVCGEEngine OUTBOARD MIN.10kgTotal deductible

International
One Design
Certificate
2024

Boat

J 70

MNA-1234

MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentORC0.370.881.432.142.5715.46CLASS
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentORC0.060.350.651.251.862.458.00YesNo 10.00CLASS
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateCommentORC10.808.809.805.565.7098%45.64CLASS