Double HandedClub 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 Angles42.5°42.5°40.1°39.5°39.6°40.0°40.4°42.3°47.1°
Beat VMG2.493.363.944.134.194.204.204.093.72
52°3.865.055.715.915.996.036.056.035.84
60°4.085.265.886.096.176.236.266.286.18
75°4.215.385.996.276.426.526.606.686.68
90°4.105.295.966.326.586.786.927.127.22
110°4.015.286.076.476.766.977.177.527.85
120°3.835.115.976.466.877.247.538.078.67
135°3.354.605.556.216.667.127.669.4210.89
150°2.683.854.895.726.296.717.158.3711.42
Run VMG2.323.344.245.005.666.146.537.379.89
Gybe Angles146.7°146.7°151.6°157.3°164.5°170.9°173.6°165.4°147.5°
APH ToD:634.5CDL: 6.227APH ToT: 0.9457CertNo:
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 weight170 kg(default)Minimum weight120 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.
Double HandedClub 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 VMG1448.21071.2912.8872.0860.0857.4857.7880.8968.4
52°931.6713.5630.0608.8601.3597.1594.8596.7616.5
60°881.7684.8612.7591.4583.4578.2574.7573.0582.4
75°854.8668.8601.5574.2560.5552.5545.7538.6539.0
90°877.8680.3604.4569.4547.0530.9520.5505.6498.7
110°898.4681.8592.9556.0532.4516.3502.4478.8458.5
120°940.2704.1602.9557.6524.3497.0478.2446.4415.2
135°1074.4783.4648.8580.0540.2505.3469.9382.2330.5
150°1341.3934.8736.6629.4572.4536.1503.4430.3315.3
Run VMG1551.41079.5849.4720.0635.6586.6551.2488.6364.1
Selected Courses
Windward / Leeward1498.31075.3881.1796.0747.8722.0704.5684.7666.2
All purpose1124.8831.7703.1648.9619.2600.8586.5564.0552.3
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward774.50.7747
All purpose634.50.9457
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low767.50.7818
Triple Number Coastal/Long Distance Medium631.50.9501
Triple Number Coastal/Long Distance High581.61.0316
Triple Number Windward/Leeward Low978.20.6134
Triple Number Windward/Leeward Medium768.50.7807
Triple Number Windward/Leeward High701.40.8554
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance685.90.8748
Triple Number Coastal/Long Distance Low767.50.7818
Triple Number Coastal/Long Distance Medium631.50.9501
Triple Number Coastal/Long Distance High581.61.0316
Triple Number Windward/Leeward Low978.20.6134
Triple Number Windward/Leeward Medium768.50.7807
Triple Number Windward/Leeward High701.40.8554
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.31075.7832.7723.7660.1622.6590.8535.9513.9
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6654
Downwind "popa"0.8552
70% up, 30% down "Ilhabela"0.7129
30% up, 70% down "Ilhabela-inverso"0.7878
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low767.50.7818
Triple Number Coastal/Long Distance Medium631.50.9501
Triple Number Coastal/Long Distance High581.61.0316
Triple Number Windward/Leeward Low978.20.6134
Triple Number Windward/Leeward Medium768.50.7807
Triple Number Windward/Leeward High701.40.8554
Predominantly Upwind689.90.8696
Predominantly Downwind628.70.9543
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low767.40.7818
Triple Number AP Medium631.50.9501
Triple Number AP High581.61.0316
Triple Number Windward/Leeward Low1021.90.5872
Triple Number Windward/Leeward Medium768.50.7807
Triple Number Windward/Leeward High701.40.8554
Single Number Predominant Upwind714.00.8403
Single Number Predominant Reaching622.20.9643
Single Number Predominant Downwind652.30.9198
Predominant Upwind - Low902.60.6648
Predominant Upwind - Low/Med729.70.8223
Predominant Upwind - Medium676.90.8864
Predominant Upwind - Med/High652.40.9197
Predominant Upwind - High646.40.9283
Predominant Downwind Low923.30.6499
Predominant Downwind Low/Med703.30.8531
Predominant Downwind Medium612.00.9804
Predominant Downwind Med/High548.71.0934
Predominant Downwind High498.41.2039
Predominant Reaching Low816.10.7352
Predominant Reaching Low/Med653.10.9188
Predominant Reaching Medium591.71.0141
Predominant Reaching Med/High549.61.0917
Predominant Reaching High519.01.1561
SA/DSPL Upwind29.61SA/DSPL Downwind51.96
Scoring OptionTODTOT
5-Band Windward/Leeward Low1132.90.5296
5-Band Windward/Leeward Low/Med860.00.6977
5-Band Windward/Leeward Medium759.00.7905
5-Band Windward/Leeward Med/High707.70.8478
5-Band Windward/Leeward High684.90.8760
Windward/Leeward 60-40 Low1131.50.5303
Windward/Leeward 60-40 Low/Med870.80.6890
Windward/Leeward 60-40 Medium780.40.7689
Windward/Leeward 60-40 Med/High738.50.8124
Windward/Leeward 60-40 High726.30.8261
5-Band AP Low840.00.7143
5-Band AP Low/Med690.50.8689
5-Band AP Medium625.30.9595
5-Band AP Med/High587.91.0207
5-Band AP High565.81.0604
5-Band SF Bay Tour - Low978.30.6133
5-Band SF Bay Tour - Low/Med825.00.7273
5-Band SF Bay Tour - Medium737.60.8135
5-Band SF Bay Tour - Med/High692.50.8664
5-Band SF Bay Tour - High671.50.8935
Chicago-Mac Upwind0.8226
Chicago-Mac All Purpose0.8568
Chicago-Mac Downwind0.8881
Bayview-Mac Cove Island0.6521
Bayview-Mac Shore0.6573
Harvest Moon Regatta547.41.0961
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance685.90.8748
Triple Number Coastal/Long Distance Low767.50.7818
Triple Number Coastal/Long Distance Medium631.50.9501
Triple Number Coastal/Long Distance High581.61.0316
Triple Number Windward/Leeward Low978.20.6134
Triple Number Windward/Leeward Medium768.50.7807
Triple Number Windward/Leeward High701.40.8554
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.31075.7832.7723.7660.1622.6590.8535.9513.9
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance685.90.8748
Triple Number Coastal/Long Distance Low767.50.7818
Triple Number Coastal/Long Distance Medium631.50.9501
Triple Number Coastal/Long Distance High581.61.0316
Triple Number Windward/Leeward Low978.20.6134
Triple Number Windward/Leeward Medium768.50.7807
Triple Number Windward/Leeward High701.40.8554
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.31075.7832.7723.7660.1622.6590.8535.9513.9
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance685.9
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.31075.7832.7723.7660.1622.6590.8535.9513.9
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low767.50.7818
Triple Number Coastal/Long Distance Medium631.50.9501
Triple Number Coastal/Long Distance High581.61.0316
Triple Number Windward/Leeward Low978.20.6134
Triple Number Windward/Leeward Medium768.50.7807
Triple Number Windward/Leeward High701.40.8554
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating (Coastal/Long Distance)685.90.8748
Triple Number Coastal/Long Distance Low767.50.7818
Triple Number Coastal/Long Distance Medium631.50.9501
Triple Number Coastal/Long Distance High581.61.0316
Triple Number Windward/Leeward Low978.20.6134
Triple Number Windward/Leeward Medium768.50.7807
Triple Number Windward/Leeward High701.40.8554
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.31075.7832.7723.7660.1622.6590.8535.9513.9
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low767.50.7818
Triple Number Coastal/Long Distance Medium631.50.9501
Triple Number Coastal/Long Distance High581.61.0316
Triple Number Windward/Leeward Low978.20.6134
Triple Number Windward/Leeward Medium768.50.7807
Triple Number Windward/Leeward High701.40.8554
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8748
Triple Number Coastal/Long Distance Low0.7818
Triple Number Coastal/Long Distance Medium0.9501
Triple Number Coastal/Long Distance High1.0316
Triple Number Windward/Leeward Low0.6134
Triple Number Windward/Leeward Medium0.7807
Triple Number Windward/Leeward High0.8554
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.31075.7832.7723.7660.1622.6590.8535.9513.9
For information
General Purpose Handicap (GPH)701.2
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance685.90.8748
Triple Number Coastal/Long Distance Low767.50.7818
Triple Number Coastal/Long Distance Medium631.50.9501
Triple Number Coastal/Long Distance High581.61.0316
Triple Number Windward/Leeward Low978.20.6134
Triple Number Windward/Leeward Medium768.50.7807
Triple Number Windward/Leeward High701.40.8554
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.31075.7832.7723.7660.1622.6590.8535.9513.9
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low767.50.7818
Triple Number Coastal/Long Distance Medium631.50.9501
Triple Number Coastal/Long Distance High581.61.0316
Triple Number Windward/Leeward Low978.20.6134
Triple Number Windward/Leeward Medium768.50.7807
Triple Number Windward/Leeward High701.40.8554
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance685.90.8748
Triple Number Coastal/Long Distance Low767.50.7818
Triple Number Coastal/Long Distance Medium631.50.9501
Triple Number Coastal/Long Distance High581.61.0316
Triple Number Windward/Leeward Low978.20.6134
Triple Number Windward/Leeward Medium768.50.7807
Triple Number Windward/Leeward High701.40.8554
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.31075.7832.7723.7660.1622.6590.8535.9513.9
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance685.90.8748
Triple Number Coastal/Long Distance Low767.50.7818
Triple Number Coastal/Long Distance Medium631.50.9501
Triple Number Coastal/Long Distance High581.61.0316
Triple Number Windward/Leeward Low978.20.6134
Triple Number Windward/Leeward Medium768.50.7807
Triple Number Windward/Leeward High701.40.8554
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.31075.7832.7723.7660.1622.6590.8535.9513.9
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low767.5
Triple Number Coastal/Long Distance Medium631.5
Triple Number Coastal/Long Distance High581.6
Triple Number Windward/Leeward Low978.2
Triple Number Windward/Leeward Medium768.5
Triple Number Windward/Leeward High701.4
Predominantly Upwind689.9
Predominantly Downwind628.7
Predominantly Reaching609.1
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance685.90.8748
Triple Number Coastal/Long Distance Low767.50.7818
Triple Number Coastal/Long Distance Medium631.50.9501
Triple Number Coastal/Long Distance High581.61.0316
Triple Number Windward/Leeward Low978.20.6134
Triple Number Windward/Leeward Medium768.50.7807
Triple Number Windward/Leeward High701.40.8554
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.31075.7832.7723.7660.1622.6590.8535.9513.9
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7818
Triple Number Coastal/Long Distance Medium0.9501
Triple Number Coastal/Long Distance High1.0316
Triple Number Windward/Leeward Low0.6134
Triple Number Windward/Leeward Medium0.7807
Triple Number Windward/Leeward High0.8554
Coastal/Long Distance0.8748
Predominantly Upwind0.8696
Predominantly Downwind0.9543
For information
General Purpose Handicap (GPH)701.2
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9457
Distanseseilas Trippeltall svak vind0.7818
Distanseseilas Trippeltall mellomvind0.9501
Distanseseilas Trippeltall sterk vind1.0316
Pølsebane Trippeltall svak vind0.6134
Pølsebane Trippeltall mellomvind0.7807
Pølsebane Trippeltall sterk vind0.8554
Motvind Singeltall0.8696
Medvind Singeltall0.9543
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low767.50.7818
Triple Number Coastal/Long Distance Medium631.50.9501
Triple Number Coastal/Long Distance High581.61.0316
Triple Number Windward/Leeward Low978.20.6134
Triple Number Windward/Leeward Medium768.50.7807
Triple Number Windward/Leeward High701.40.8554
Coastal/Long Distance685.90.8748
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind689.90.8696
Predominantly Downwind628.70.9543
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore671.80.8932
Cape Doctor Coastal555.81.0796
Triple Number Coastal/Long Distance Low767.50.7818
Triple Number Coastal/Long Distance Medium631.50.9501
Triple Number Coastal/Long Distance High581.61.0316
Triple Number Windward/Leeward Low978.20.6134
Triple Number Windward/Leeward Medium768.50.7807
Triple Number Windward/Leeward High701.40.8554
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7818
Triple Number Coastal/Long Distance Medium0.9501
Triple Number Coastal/Long Distance High1.0316
Triple Number Windward/Leeward Low0.6134
Triple Number Windward/Leeward Medium0.7807
Triple Number Windward/Leeward High0.8554
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7818
Triple Number Coastal/Long Distance Medium0.9501
Triple Number Coastal/Long Distance High1.0316
Triple Number Windward/Leeward Low0.6134
Triple Number Windward/Leeward Medium0.7807
Triple Number Windward/Leeward High0.8554
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance685.90.8748
Triple Number Coastal/Long Distance Low767.50.7818
Triple Number Coastal/Long Distance Medium631.50.9501
Triple Number Coastal/Long Distance High581.61.0316
Triple Number Windward/Leeward Low978.20.6134
Triple Number Windward/Leeward Medium768.50.7807
Triple Number Windward/Leeward High701.40.8554
Predominantly Upwind689.90.8696
Predominantly Downwind628.70.9543
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.31075.7832.7723.7660.1622.6590.8535.9513.9
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance685.90.8748
Triple Number Coastal/Long Distance Low767.50.7818
Triple Number Coastal/Long Distance Medium631.50.9501
Triple Number Coastal/Long Distance High581.61.0316
Triple Number Windward/Leeward Low978.20.6134
Triple Number Windward/Leeward Medium768.50.7807
Triple Number Windward/Leeward High701.40.8554
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1589.31075.7832.7723.7660.1622.6590.8535.9513.9
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low767.40.7818
Triple Number AP Medium631.50.9501
Triple Number AP High581.61.0316
Triple Number Windward/Leeward Low1021.90.5872
Triple Number Windward/Leeward Medium768.50.7807
Triple Number Windward/Leeward High701.40.8554
Single Number Predominant Upwind714.00.8403
Single Number Predominant Reaching622.20.9643
Single Number Predominant Downwind652.30.9198
Predominant Upwind - Low902.60.6648
Predominant Upwind - Low/Med729.70.8223
Predominant Upwind - Medium676.90.8864
Predominant Upwind - Med/High652.40.9197
Predominant Upwind - High646.40.9283
Predominant Downwind Low923.30.6499
Predominant Downwind Low/Med703.30.8531
Predominant Downwind Medium612.00.9804
Predominant Downwind Med/High548.71.0934
Predominant Downwind High498.41.2039
Predominant Reaching Low816.10.7352
Predominant Reaching Low/Med653.10.9188
Predominant Reaching Medium591.71.0141
Predominant Reaching Med/High549.61.0917
Predominant Reaching High519.01.1561
SA/DSPL Upwind29.61SA/DSPL Downwind51.96
Scoring OptionTODTOT
5-Band Windward/Leeward Low1132.90.5296
5-Band Windward/Leeward Low/Med860.00.6977
5-Band Windward/Leeward Medium759.00.7905
5-Band Windward/Leeward Med/High707.70.8478
5-Band Windward/Leeward High684.90.8760
Windward/Leeward 60-40 Low1131.50.5303
Windward/Leeward 60-40 Low/Med870.80.6890
Windward/Leeward 60-40 Medium780.40.7689
Windward/Leeward 60-40 Med/High738.50.8124
Windward/Leeward 60-40 High726.30.8261
5-Band AP Low840.00.7143
5-Band AP Low/Med690.50.8689
5-Band AP Medium625.30.9595
5-Band AP Med/High587.91.0207
5-Band AP High565.81.0604
5-Band SF Bay Tour - Low978.30.6133
5-Band SF Bay Tour - Low/Med825.00.7273
5-Band SF Bay Tour - Medium737.60.8135
5-Band SF Bay Tour - Med/High692.50.8664
5-Band SF Bay Tour - High671.50.8935
Chicago-Mac Upwind0.8226
Chicago-Mac All Purpose0.8568
Chicago-Mac Downwind0.8881
Bayview-Mac Cove Island0.6521
Bayview-Mac Shore0.6573
Harvest Moon Regatta547.41.0961
Double HandedClub 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 L6.424LSM05.898Acc. length7.927Sink (kg/mm) 9.17
VCGD0.069VCGM0.163RM Rated (kg·m) 30.9Limit of positive stability(°) N/AStability IndexN/ADefault crew weight170Declared crew weightN/A
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
Double HandedClub 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 *