Club Certificate2025
JojoNED 8748
Rated boat velocities in knots
Wind Velocity 4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Beat Angles42.6°42.6°40.6°38.2°37.6°37.6°37.8°38.7°41.4°
Beat VMG2.433.313.974.354.474.514.534.504.32
52°3.774.985.746.086.206.266.306.346.29
60°4.025.215.896.216.366.446.506.576.56
75°4.165.345.986.336.566.726.826.977.03
90°3.985.246.016.376.636.897.107.407.59
110°3.965.246.076.536.897.207.447.918.41
120°3.785.075.956.456.887.317.778.689.77
135°3.304.545.516.186.627.057.539.4012.02
150°2.653.814.855.696.266.677.078.1010.95
Run VMG2.293.304.204.975.646.126.497.249.49
Gybe Angles146.7°146.7°151.4°157.3°164.9°173.6°176.3°170.8°143.6°
APH ToD:620.7CDL: 6.738APH ToT: 0.9666CertNo:
BOAT
ClassX-79 ODDesignerJEPPESENBuilderX-YACHTSAge date01/1984Series date01/1979Offset fileX79.OD.OFFData fileNED8748
HULL
Length Overall7.927 mMaximum Beam2.860 mDraft1.363 mDisplacement1,550 kgDLR7.5534IMS DivisionPerformanceDynamic Allowance0.000%Age Allowance0.487%
PROPELLER
InstallationNo PropellerTypeN/ADiameterN/A
CREW
Maximum weight352 kg(declared)Minimum weight222 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail20.8821.30Headsail Luffed18.8318.83Headsail FlyingSymmetric48.8248.82Asymmetric
STORM SAIL AREAS (m²)
Trysail6.13Storm Jib4.20Heavy Weather Jib11.33
SAIL LIMITS
Headsails5Spinnakers4
STABILITY
Righting MomentN/AStability IndexN/A
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.
Club Certificate2025
JojoNED 8748
Time Allowances in secs/NM
Wind Velocity 4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Beat VMG1483.01087.5907.9827.2805.9798.4795.0800.4833.8
52°954.0722.2626.9592.0580.4574.9571.0567.7572.0
60°895.8690.5610.9579.7565.7559.3554.2548.3549.0
75°866.4674.2601.8569.0548.6535.9528.2516.5512.2
90°904.2687.0599.0565.4543.2522.6506.8486.7474.4
110°910.2686.6592.8551.5522.1500.0484.0455.4427.8
120°953.4710.4605.2558.2523.4492.8463.5414.7368.7
135°1091.4792.5653.3582.2543.7510.6478.0383.0299.6
150°1357.3944.5742.5632.3574.9540.0509.4444.2328.7
Run VMG1570.21090.6856.4724.1637.8588.7554.7497.5379.5
Selected Courses
Windward / Leeward1524.71089.1882.1775.6721.8693.5674.9648.9606.7
All purpose1145.9841.2703.0636.9603.3582.4566.2537.5507.0
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward753.00.7968
All purpose620.70.9666
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low772.10.7771
Triple Number Coastal/Long Distance Medium617.60.9715
Triple Number Coastal/Long Distance High559.51.0724
Triple Number Windward/Leeward Low985.50.6088
Triple Number Windward/Leeward Medium746.10.8042
Triple Number Windward/Leeward High669.80.8958
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance671.70.8933
Triple Number Coastal/Long Distance Low772.10.7771
Triple Number Coastal/Long Distance Medium617.60.9715
Triple Number Coastal/Long Distance High559.51.0724
Triple Number Windward/Leeward Low985.50.6088
Triple Number Windward/Leeward Medium746.10.8042
Triple Number Windward/Leeward High669.80.8958
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1619.41089.2833.6708.1641.3603.6570.4512.3478.5
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6974
Downwind "popa"0.8485
70% up, 30% down "Ilhabela"0.7368
30% up, 70% down "Ilhabela-inverso"0.7967
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low772.10.7771
Triple Number Coastal/Long Distance Medium617.60.9715
Triple Number Coastal/Long Distance High559.51.0724
Triple Number Windward/Leeward Low985.50.6088
Triple Number Windward/Leeward Medium746.10.8042
Triple Number Windward/Leeward High669.80.8958
Predominantly Upwind671.30.8938
Predominantly Downwind626.20.9582
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low772.10.7771
Triple Number AP Medium617.70.9714
Triple Number AP High559.51.0724
Triple Number Windward/Leeward Low1029.10.5831
Triple Number Windward/Leeward Medium746.10.8042
Triple Number Windward/Leeward High669.80.8958
Single Number Predominant Upwind694.80.8635
Single Number Predominant Reaching615.50.9749
Single Number Predominant Downwind649.50.9238
Predominant Upwind - Low914.10.6564
Predominant Upwind - Low/Med719.80.8336
Predominant Upwind - Medium654.20.9172
Predominant Upwind - Med/High622.70.9636
Predominant Upwind - High605.70.9907
Predominant Downwind Low934.10.6424
Predominant Downwind Low/Med703.30.8531
Predominant Downwind Medium607.40.9879
Predominant Downwind Med/High542.31.1063
Predominant Downwind High486.91.2322
Predominant Reaching Low826.00.7264
Predominant Reaching Low/Med650.20.9228
Predominant Reaching Medium583.51.0284
Predominant Reaching Med/High537.31.1168
Predominant Reaching High499.11.2023
SA/DSPL Upwind29.61SA/DSPL Downwind51.96
Scoring OptionTODTOT
5-Band Windward/Leeward Low1146.70.5232
5-Band Windward/Leeward Low/Med851.40.7047
5-Band Windward/Leeward Medium735.50.8158
5-Band Windward/Leeward Med/High677.60.8855
5-Band Windward/Leeward High646.10.9287
Windward/Leeward 60-40 Low1145.70.5237
Windward/Leeward 60-40 Low/Med859.30.6983
Windward/Leeward 60-40 Medium751.50.7984
Windward/Leeward 60-40 Med/High701.50.8553
Windward/Leeward 60-40 High677.90.8851
5-Band AP Low848.90.7068
5-Band AP Low/Med685.30.8755
5-Band AP Medium610.60.9827
5-Band AP Med/High567.21.0578
5-Band AP High537.21.1169
5-Band SF Bay Tour - Low988.60.6069
5-Band SF Bay Tour - Low/Med815.90.7354
5-Band SF Bay Tour - Medium713.80.8406
5-Band SF Bay Tour - Med/High662.00.9064
5-Band SF Bay Tour - High630.50.9517
Chicago-Mac Upwind0.8424
Chicago-Mac All Purpose0.8687
Chicago-Mac Downwind0.8907
Bayview-Mac Cove Island0.6501
Bayview-Mac Shore0.6552
Harvest Moon Regatta540.11.1108
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance671.70.8933
Triple Number Coastal/Long Distance Low772.10.7771
Triple Number Coastal/Long Distance Medium617.60.9715
Triple Number Coastal/Long Distance High559.51.0724
Triple Number Windward/Leeward Low985.50.6088
Triple Number Windward/Leeward Medium746.10.8042
Triple Number Windward/Leeward High669.80.8958
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1619.41089.2833.6708.1641.3603.6570.4512.3478.5
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance671.70.8933
Triple Number Coastal/Long Distance Low772.10.7771
Triple Number Coastal/Long Distance Medium617.60.9715
Triple Number Coastal/Long Distance High559.51.0724
Triple Number Windward/Leeward Low985.50.6088
Triple Number Windward/Leeward Medium746.10.8042
Triple Number Windward/Leeward High669.80.8958
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1619.41089.2833.6708.1641.3603.6570.4512.3478.5
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance671.7
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1619.41089.2833.6708.1641.3603.6570.4512.3478.5
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low772.10.7771
Triple Number Coastal/Long Distance Medium617.60.9715
Triple Number Coastal/Long Distance High559.51.0724
Triple Number Windward/Leeward Low985.50.6088
Triple Number Windward/Leeward Medium746.10.8042
Triple Number Windward/Leeward High669.80.8958
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating (Coastal/Long Distance)671.70.8933
Triple Number Coastal/Long Distance Low772.10.7771
Triple Number Coastal/Long Distance Medium617.60.9715
Triple Number Coastal/Long Distance High559.51.0724
Triple Number Windward/Leeward Low985.50.6088
Triple Number Windward/Leeward Medium746.10.8042
Triple Number Windward/Leeward High669.80.8958
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1619.41089.2833.6708.1641.3603.6570.4512.3478.5
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low772.10.7771
Triple Number Coastal/Long Distance Medium617.60.9715
Triple Number Coastal/Long Distance High559.51.0724
Triple Number Windward/Leeward Low985.50.6088
Triple Number Windward/Leeward Medium746.10.8042
Triple Number Windward/Leeward High669.80.8958
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8933
Triple Number Coastal/Long Distance Low0.7771
Triple Number Coastal/Long Distance Medium0.9715
Triple Number Coastal/Long Distance High1.0724
Triple Number Windward/Leeward Low0.6088
Triple Number Windward/Leeward Medium0.8042
Triple Number Windward/Leeward High0.8958
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1619.41089.2833.6708.1641.3603.6570.4512.3478.5
For information
General Purpose Handicap (GPH)691.0
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance671.70.8933
Triple Number Coastal/Long Distance Low772.10.7771
Triple Number Coastal/Long Distance Medium617.60.9715
Triple Number Coastal/Long Distance High559.51.0724
Triple Number Windward/Leeward Low985.50.6088
Triple Number Windward/Leeward Medium746.10.8042
Triple Number Windward/Leeward High669.80.8958
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1619.41089.2833.6708.1641.3603.6570.4512.3478.5
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low772.10.7771
Triple Number Coastal/Long Distance Medium617.60.9715
Triple Number Coastal/Long Distance High559.51.0724
Triple Number Windward/Leeward Low985.50.6088
Triple Number Windward/Leeward Medium746.10.8042
Triple Number Windward/Leeward High669.80.8958
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance671.70.8933
Triple Number Coastal/Long Distance Low772.10.7771
Triple Number Coastal/Long Distance Medium617.60.9715
Triple Number Coastal/Long Distance High559.51.0724
Triple Number Windward/Leeward Low985.50.6088
Triple Number Windward/Leeward Medium746.10.8042
Triple Number Windward/Leeward High669.80.8958
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1619.41089.2833.6708.1641.3603.6570.4512.3478.5
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance671.70.8933
Triple Number Coastal/Long Distance Low772.10.7771
Triple Number Coastal/Long Distance Medium617.60.9715
Triple Number Coastal/Long Distance High559.51.0724
Triple Number Windward/Leeward Low985.50.6088
Triple Number Windward/Leeward Medium746.10.8042
Triple Number Windward/Leeward High669.80.8958
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1619.41089.2833.6708.1641.3603.6570.4512.3478.5
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low772.1
Triple Number Coastal/Long Distance Medium617.6
Triple Number Coastal/Long Distance High559.5
Triple Number Windward/Leeward Low985.5
Triple Number Windward/Leeward Medium746.1
Triple Number Windward/Leeward High669.8
Predominantly Upwind671.3
Predominantly Downwind626.2
Predominantly Reaching604.4
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance671.70.8933
Triple Number Coastal/Long Distance Low772.10.7771
Triple Number Coastal/Long Distance Medium617.60.9715
Triple Number Coastal/Long Distance High559.51.0724
Triple Number Windward/Leeward Low985.50.6088
Triple Number Windward/Leeward Medium746.10.8042
Triple Number Windward/Leeward High669.80.8958
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1619.41089.2833.6708.1641.3603.6570.4512.3478.5
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7771
Triple Number Coastal/Long Distance Medium0.9715
Triple Number Coastal/Long Distance High1.0724
Triple Number Windward/Leeward Low0.6088
Triple Number Windward/Leeward Medium0.8042
Triple Number Windward/Leeward High0.8958
Coastal/Long Distance0.8933
Predominantly Upwind0.8938
Predominantly Downwind0.9582
For information
General Purpose Handicap (GPH)691.0
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9666
Distanseseilas Trippeltall svak vind0.7771
Distanseseilas Trippeltall mellomvind0.9715
Distanseseilas Trippeltall sterk vind1.0724
Pølsebane Trippeltall svak vind0.6088
Pølsebane Trippeltall mellomvind0.8042
Pølsebane Trippeltall sterk vind0.8958
Motvind Singeltall0.8938
Medvind Singeltall0.9582
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low772.10.7771
Triple Number Coastal/Long Distance Medium617.60.9715
Triple Number Coastal/Long Distance High559.51.0724
Triple Number Windward/Leeward Low985.50.6088
Triple Number Windward/Leeward Medium746.10.8042
Triple Number Windward/Leeward High669.80.8958
Coastal/Long Distance671.70.8933
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind671.30.8938
Predominantly Downwind626.20.9582
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore619.30.9688
Cape Doctor Coastal516.11.1625
Triple Number Coastal/Long Distance Low772.10.7771
Triple Number Coastal/Long Distance Medium617.60.9715
Triple Number Coastal/Long Distance High559.51.0724
Triple Number Windward/Leeward Low985.50.6088
Triple Number Windward/Leeward Medium746.10.8042
Triple Number Windward/Leeward High669.80.8958
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7771
Triple Number Coastal/Long Distance Medium0.9715
Triple Number Coastal/Long Distance High1.0724
Triple Number Windward/Leeward Low0.6088
Triple Number Windward/Leeward Medium0.8042
Triple Number Windward/Leeward High0.8958
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7771
Triple Number Coastal/Long Distance Medium0.9715
Triple Number Coastal/Long Distance High1.0724
Triple Number Windward/Leeward Low0.6088
Triple Number Windward/Leeward Medium0.8042
Triple Number Windward/Leeward High0.8958
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance671.70.8933
Triple Number Coastal/Long Distance Low772.10.7771
Triple Number Coastal/Long Distance Medium617.60.9715
Triple Number Coastal/Long Distance High559.51.0724
Triple Number Windward/Leeward Low985.50.6088
Triple Number Windward/Leeward Medium746.10.8042
Triple Number Windward/Leeward High669.80.8958
Predominantly Upwind671.30.8938
Predominantly Downwind626.20.9582
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1619.41089.2833.6708.1641.3603.6570.4512.3478.5
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance671.70.8933
Triple Number Coastal/Long Distance Low772.10.7771
Triple Number Coastal/Long Distance Medium617.60.9715
Triple Number Coastal/Long Distance High559.51.0724
Triple Number Windward/Leeward Low985.50.6088
Triple Number Windward/Leeward Medium746.10.8042
Triple Number Windward/Leeward High669.80.8958
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1619.41089.2833.6708.1641.3603.6570.4512.3478.5
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low772.10.7771
Triple Number AP Medium617.70.9714
Triple Number AP High559.51.0724
Triple Number Windward/Leeward Low1029.10.5831
Triple Number Windward/Leeward Medium746.10.8042
Triple Number Windward/Leeward High669.80.8958
Single Number Predominant Upwind694.80.8635
Single Number Predominant Reaching615.50.9749
Single Number Predominant Downwind649.50.9238
Predominant Upwind - Low914.10.6564
Predominant Upwind - Low/Med719.80.8336
Predominant Upwind - Medium654.20.9172
Predominant Upwind - Med/High622.70.9636
Predominant Upwind - High605.70.9907
Predominant Downwind Low934.10.6424
Predominant Downwind Low/Med703.30.8531
Predominant Downwind Medium607.40.9879
Predominant Downwind Med/High542.31.1063
Predominant Downwind High486.91.2322
Predominant Reaching Low826.00.7264
Predominant Reaching Low/Med650.20.9228
Predominant Reaching Medium583.51.0284
Predominant Reaching Med/High537.31.1168
Predominant Reaching High499.11.2023
SA/DSPL Upwind29.61SA/DSPL Downwind51.96
Scoring OptionTODTOT
5-Band Windward/Leeward Low1146.70.5232
5-Band Windward/Leeward Low/Med851.40.7047
5-Band Windward/Leeward Medium735.50.8158
5-Band Windward/Leeward Med/High677.60.8855
5-Band Windward/Leeward High646.10.9287
Windward/Leeward 60-40 Low1145.70.5237
Windward/Leeward 60-40 Low/Med859.30.6983
Windward/Leeward 60-40 Medium751.50.7984
Windward/Leeward 60-40 Med/High701.50.8553
Windward/Leeward 60-40 High677.90.8851
5-Band AP Low848.90.7068
5-Band AP Low/Med685.30.8755
5-Band AP Medium610.60.9827
5-Band AP Med/High567.21.0578
5-Band AP High537.21.1169
5-Band SF Bay Tour - Low988.60.6069
5-Band SF Bay Tour - Low/Med815.90.7354
5-Band SF Bay Tour - Medium713.80.8406
5-Band SF Bay Tour - Med/High662.00.9064
5-Band SF Bay Tour - High630.50.9517
Chicago-Mac Upwind0.8424
Chicago-Mac All Purpose0.8687
Chicago-Mac Downwind0.8907
Bayview-Mac Cove Island0.6501
Bayview-Mac Shore0.6552
Harvest Moon Regatta540.11.1108
Club Certificate2025
JojoNED 8748
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassX-79 ODMeasurement01/01/2016HINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA7.927Max. Beam2.860Draft1.363Displacement1,550Wetted area12.00IMS L6.609LSM05.898Acc. length7.927Sink (kg/mm) 9.17
VCGD0.069VCGM0.163RM Rated (kg·m) 30.9Limit of positive stability(°) N/AStability IndexN/ADefault crew weight324Declared crew weight352
PROPELLER
Propeller TypeNo Propeller
Hydro generatorNo
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays2CheckstaysSpreaders1Rotating mastNo
P10.000IG9.160ISP9.420MDT10.080MDL10.120MDT20.052MDL20.065TL1.900MW0.120GO0.120
E3.500J2.780BAS1.170FSD0.000SFJ0.000SPL2.860WPLTPSBD0.115MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered0.051Flotation Date01/01/1900CommentBB motor aan spiegel bij meting
SFFP0.509FFM0.815FF0.827LCFcl4.131SG1.0100
SAFP7.625FAM0.818FA0.826LCFsh4.355HBI0.813
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
JojoNED 8748
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentORC0.140.741.302.242.9820.88* Copied from legacy *
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentORC0.054.149.00NoNo 18.83* Copied from legacy *
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateCommentORC9.259.259.256.684.9548.82* Copied from legacy *