Double HandedClub Certificate2025
HebbesNED 7873
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 Angles42.7°42.7°41.0°40.4°40.4°39.9°39.6°39.7°41.5°
Beat VMG2.413.313.984.334.504.614.674.714.57
52°3.715.025.936.376.536.636.696.776.67
60°3.945.296.206.596.766.876.947.036.98
75°4.155.506.376.817.077.227.347.507.55
90°4.255.666.566.977.257.557.768.058.23
110°4.195.656.667.237.638.028.318.789.07
120°4.065.546.607.247.808.228.639.4810.08
135°3.504.966.176.937.558.178.8410.2611.27
150°2.934.185.306.276.937.498.069.3511.36
Run VMG2.533.624.595.436.026.496.998.109.84
Gybe Angles143.1°143.1°147.5°149.8°152.8°152.3°151.3°148.0°144.7°
APH ToD:582.3CDL: 7.820APH ToT: 1.0304CertNo:None
BOAT
ClassOne OffDesignerK. de RidderBuilderJ. Velsen PartnersAge date07/2008Series date01/2008Offset filecr850155.offData fileNED7873
HULL
Length Overall9.150 mMaximum Beam3.002 mDraft2.183 mDisplacement2,812 kgDLR4.4397IMS DivisionCruiser/RacerDynamic Allowance0.140%Age Allowance0.487%
PROPELLER
InstallationIn ApertureTypeFolding 2 bladesDiameter0.375m
CREW
Maximum weight170 kg(default)Minimum weight120 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail32.9734.33Headsail Luffed20.3720.37Headsail FlyingSymmetricAsymmetric74.8974.89 (1 asymmetric(s) with SHW/SFL < 85%)
STORM SAIL AREAS (m²)
Trysail8.00Storm Jib6.53Heavy Weather Jib17.61
SAIL LIMITS
Headsails5
✱ One set on the forestay
Spinnakers4
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
HebbesNED 7873
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 VMG1492.51086.9905.0831.8799.3781.6770.4764.0786.9
52°970.1716.9606.6565.4551.3543.2537.8532.0539.9
60°914.5680.4580.8546.0532.3524.2518.7512.2516.0
75°868.4654.4564.8528.4509.1498.5490.3480.3476.5
90°846.5636.2548.5516.3496.4477.1464.1447.4437.6
110°859.1637.5540.5498.2472.0449.2433.0410.1396.8
120°886.1650.3545.2497.4461.7437.7417.0379.8357.0
135°1029.5725.1583.1519.5477.1440.5407.3350.9319.4
150°1230.6861.7679.4574.5519.6481.0446.6384.9316.8
Run VMG1421.6995.0784.5663.4597.9554.4515.3444.4365.8
Selected Courses
Windward / Leeward1456.71040.9844.8747.6698.6668.0642.8604.2576.4
All purpose1103.3801.0662.7599.8566.5543.5525.1497.4481.2
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward723.70.8290
All purpose582.31.0304
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low731.90.8198
Triple Number Coastal/Long Distance Medium579.91.0347
Triple Number Coastal/Long Distance High519.31.1554
Triple Number Windward/Leeward Low942.80.6364
Triple Number Windward/Leeward Medium719.50.8339
Triple Number Windward/Leeward High634.70.9454
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance633.80.9467
Triple Number Coastal/Long Distance Low731.90.8198
Triple Number Coastal/Long Distance Medium579.91.0347
Triple Number Coastal/Long Distance High519.31.1554
Triple Number Windward/Leeward Low942.80.6364
Triple Number Windward/Leeward Medium719.50.8339
Triple Number Windward/Leeward High634.70.9454
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1540.81036.3793.5674.1606.2564.8529.4471.8452.7
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7072
Downwind "popa"0.9221
70% up, 30% down "Ilhabela"0.7603
30% up, 70% down "Ilhabela-inverso"0.8450
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low731.90.8198
Triple Number Coastal/Long Distance Medium579.91.0347
Triple Number Coastal/Long Distance High519.31.1554
Triple Number Windward/Leeward Low942.80.6364
Triple Number Windward/Leeward Medium719.50.8339
Triple Number Windward/Leeward High634.70.9454
Predominantly Upwind640.10.9374
Predominantly Downwind576.21.0412
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low731.90.8198
Triple Number AP Medium579.91.0347
Triple Number AP High519.31.1554
Triple Number Windward/Leeward Low984.60.6094
Triple Number Windward/Leeward Medium719.50.8339
Triple Number Windward/Leeward High634.70.9454
Single Number Predominant Upwind664.70.9026
Single Number Predominant Reaching570.51.0516
Single Number Predominant Downwind600.01.0000
Predominant Upwind - Low889.80.6743
Predominant Upwind - Low/Med692.20.8668
Predominant Upwind - Medium623.90.9616
Predominant Upwind - Med/High587.11.0220
Predominant Upwind - High569.61.0533
Predominant Downwind Low870.30.6894
Predominant Downwind Low/Med649.50.9238
Predominant Downwind Medium559.31.0729
Predominant Downwind Med/High495.71.2105
Predominant Downwind High450.21.3328
Predominant Reaching Low778.60.7706
Predominant Reaching Low/Med603.40.9943
Predominant Reaching Medium537.41.1165
Predominant Reaching Med/High492.01.2195
Predominant Reaching High463.11.2956
SA/DSPL Upwind26.68SA/DSPL Downwind53.95
Scoring OptionTODTOT
5-Band Windward/Leeward Low1095.90.5475
5-Band Windward/Leeward Low/Med817.80.7337
5-Band Windward/Leeward Medium709.10.8461
5-Band Windward/Leeward Med/High645.30.9298
5-Band Windward/Leeward High606.10.9899
Windward/Leeward 60-40 Low1105.30.5428
Windward/Leeward 60-40 Low/Med832.30.7209
Windward/Leeward 60-40 Medium728.90.8232
Windward/Leeward 60-40 Med/High671.00.8942
Windward/Leeward 60-40 High638.70.9394
5-Band AP Low803.70.7466
5-Band AP Low/Med646.70.9278
5-Band AP Medium572.71.0477
5-Band AP Med/High527.01.1385
5-Band AP High499.41.2015
5-Band SF Bay Tour - Low947.80.6330
5-Band SF Bay Tour - Low/Med783.30.7660
5-Band SF Bay Tour - Medium684.20.8769
5-Band SF Bay Tour - Med/High625.80.9587
5-Band SF Bay Tour - High591.31.0147
Chicago-Mac Upwind0.8778
Chicago-Mac All Purpose0.9220
Chicago-Mac Downwind0.9633
Bayview-Mac Cove Island0.6818
Bayview-Mac Shore0.6865
Harvest Moon Regatta494.21.2141
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance633.80.9467
Triple Number Coastal/Long Distance Low731.90.8198
Triple Number Coastal/Long Distance Medium579.91.0347
Triple Number Coastal/Long Distance High519.31.1554
Triple Number Windward/Leeward Low942.80.6364
Triple Number Windward/Leeward Medium719.50.8339
Triple Number Windward/Leeward High634.70.9454
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1540.81036.3793.5674.1606.2564.8529.4471.8452.7
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance633.80.9467
Triple Number Coastal/Long Distance Low731.90.8198
Triple Number Coastal/Long Distance Medium579.91.0347
Triple Number Coastal/Long Distance High519.31.1554
Triple Number Windward/Leeward Low942.80.6364
Triple Number Windward/Leeward Medium719.50.8339
Triple Number Windward/Leeward High634.70.9454
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1540.81036.3793.5674.1606.2564.8529.4471.8452.7
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance633.8
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1540.81036.3793.5674.1606.2564.8529.4471.8452.7
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low731.90.8198
Triple Number Coastal/Long Distance Medium579.91.0347
Triple Number Coastal/Long Distance High519.31.1554
Triple Number Windward/Leeward Low942.80.6364
Triple Number Windward/Leeward Medium719.50.8339
Triple Number Windward/Leeward High634.70.9454
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating633.80.9467
FinRating, kevyt tuuli1073.50.9315
FinRating, kova tuuli500.70.9987
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low731.90.8198
Triple Number Coastal/Long Distance Medium579.91.0347
Triple Number Coastal/Long Distance High519.31.1554
Triple Number Windward/Leeward Low942.80.6364
Triple Number Windward/Leeward Medium719.50.8339
Triple Number Windward/Leeward High634.70.9454
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9467
Triple Number Coastal/Long Distance Low0.8198
Triple Number Coastal/Long Distance Medium1.0347
Triple Number Coastal/Long Distance High1.1554
Triple Number Windward/Leeward Low0.6364
Triple Number Windward/Leeward Medium0.8339
Triple Number Windward/Leeward High0.9454
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1540.81036.3793.5674.1606.2564.8529.4471.8452.7
For information
General Purpose Handicap (GPH)650.1
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance633.80.9467
Triple Number Coastal/Long Distance Low731.90.8198
Triple Number Coastal/Long Distance Medium579.91.0347
Triple Number Coastal/Long Distance High519.31.1554
Triple Number Windward/Leeward Low942.80.6364
Triple Number Windward/Leeward Medium719.50.8339
Triple Number Windward/Leeward High634.70.9454
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1540.81036.3793.5674.1606.2564.8529.4471.8452.7
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low731.90.8198
Triple Number Coastal/Long Distance Medium579.91.0347
Triple Number Coastal/Long Distance High519.31.1554
Triple Number Windward/Leeward Low942.80.6364
Triple Number Windward/Leeward Medium719.50.8339
Triple Number Windward/Leeward High634.70.9454
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance633.80.9467
Triple Number Coastal/Long Distance Low731.90.8198
Triple Number Coastal/Long Distance Medium579.91.0347
Triple Number Coastal/Long Distance High519.31.1554
Triple Number Windward/Leeward Low942.80.6364
Triple Number Windward/Leeward Medium719.50.8339
Triple Number Windward/Leeward High634.70.9454
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1540.81036.3793.5674.1606.2564.8529.4471.8452.7
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance633.80.9467
Triple Number Coastal/Long Distance Low731.90.8198
Triple Number Coastal/Long Distance Medium579.91.0347
Triple Number Coastal/Long Distance High519.31.1554
Triple Number Windward/Leeward Low942.80.6364
Triple Number Windward/Leeward Medium719.50.8339
Triple Number Windward/Leeward High634.70.9454
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1540.81036.3793.5674.1606.2564.8529.4471.8452.7
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low731.9
Triple Number Coastal/Long Distance Medium579.9
Triple Number Coastal/Long Distance High519.3
Triple Number Windward/Leeward Low942.8
Triple Number Windward/Leeward Medium719.5
Triple Number Windward/Leeward High634.7
Predominantly Upwind640.1
Predominantly Downwind576.2
Predominantly Reaching555.4
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance633.80.9467
Triple Number Coastal/Long Distance Low731.90.8198
Triple Number Coastal/Long Distance Medium579.91.0347
Triple Number Coastal/Long Distance High519.31.1554
Triple Number Windward/Leeward Low942.80.6364
Triple Number Windward/Leeward Medium719.50.8339
Triple Number Windward/Leeward High634.70.9454
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1540.81036.3793.5674.1606.2564.8529.4471.8452.7
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8198
Triple Number Coastal/Long Distance Medium1.0347
Triple Number Coastal/Long Distance High1.1554
Triple Number Windward/Leeward Low0.6364
Triple Number Windward/Leeward Medium0.8339
Triple Number Windward/Leeward High0.9454
Coastal/Long Distance0.9467
Predominantly Upwind0.9374
Predominantly Downwind1.0412
For information
General Purpose Handicap (GPH)650.1
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0304
Distanseseilas Trippeltall svak vind0.8198
Distanseseilas Trippeltall mellomvind1.0347
Distanseseilas Trippeltall sterk vind1.1554
Pølsebane Trippeltall svak vind0.6364
Pølsebane Trippeltall mellomvind0.8339
Pølsebane Trippeltall sterk vind0.9454
Motvind Singeltall0.9374
Medvind Singeltall1.0412
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low731.90.8198
Triple Number Coastal/Long Distance Medium579.91.0347
Triple Number Coastal/Long Distance High519.31.1554
Triple Number Windward/Leeward Low942.80.6364
Triple Number Windward/Leeward Medium719.50.8339
Triple Number Windward/Leeward High634.70.9454
Coastal/Long Distance633.80.9467
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind640.10.9374
Predominantly Downwind576.21.0412
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore584.71.0261
Cape Doctor Coastal486.01.2345
Triple Number Coastal/Long Distance Low731.90.8198
Triple Number Coastal/Long Distance Medium579.91.0347
Triple Number Coastal/Long Distance High519.31.1554
Triple Number Windward/Leeward Low942.80.6364
Triple Number Windward/Leeward Medium719.50.8339
Triple Number Windward/Leeward High634.70.9454
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8198
Triple Number Coastal/Long Distance Medium1.0347
Triple Number Coastal/Long Distance High1.1554
Triple Number Windward/Leeward Low0.6364
Triple Number Windward/Leeward Medium0.8339
Triple Number Windward/Leeward High0.9454
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8198
Triple Number Coastal/Long Distance Medium1.0347
Triple Number Coastal/Long Distance High1.1554
Triple Number Windward/Leeward Low0.6364
Triple Number Windward/Leeward Medium0.8339
Triple Number Windward/Leeward High0.9454
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance633.80.9467
Triple Number Coastal/Long Distance Low731.90.8198
Triple Number Coastal/Long Distance Medium579.91.0347
Triple Number Coastal/Long Distance High519.31.1554
Triple Number Windward/Leeward Low942.80.6364
Triple Number Windward/Leeward Medium719.50.8339
Triple Number Windward/Leeward High634.70.9454
Predominantly Upwind640.10.9374
Predominantly Downwind576.21.0412
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1540.81036.3793.5674.1606.2564.8529.4471.8452.7
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance633.80.9467
Triple Number Coastal/Long Distance Low731.90.8198
Triple Number Coastal/Long Distance Medium579.91.0347
Triple Number Coastal/Long Distance High519.31.1554
Triple Number Windward/Leeward Low942.80.6364
Triple Number Windward/Leeward Medium719.50.8339
Triple Number Windward/Leeward High634.70.9454
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1540.81036.3793.5674.1606.2564.8529.4471.8452.7
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low731.90.8198
Triple Number AP Medium579.91.0347
Triple Number AP High519.31.1554
Triple Number Windward/Leeward Low984.60.6094
Triple Number Windward/Leeward Medium719.50.8339
Triple Number Windward/Leeward High634.70.9454
Single Number Predominant Upwind664.70.9026
Single Number Predominant Reaching570.51.0516
Single Number Predominant Downwind600.01.0000
Predominant Upwind - Low889.80.6743
Predominant Upwind - Low/Med692.20.8668
Predominant Upwind - Medium623.90.9616
Predominant Upwind - Med/High587.11.0220
Predominant Upwind - High569.61.0533
Predominant Downwind Low870.30.6894
Predominant Downwind Low/Med649.50.9238
Predominant Downwind Medium559.31.0729
Predominant Downwind Med/High495.71.2105
Predominant Downwind High450.21.3328
Predominant Reaching Low778.60.7706
Predominant Reaching Low/Med603.40.9943
Predominant Reaching Medium537.41.1165
Predominant Reaching Med/High492.01.2195
Predominant Reaching High463.11.2956
SA/DSPL Upwind26.68SA/DSPL Downwind53.95
Scoring OptionTODTOT
5-Band Windward/Leeward Low1095.90.5475
5-Band Windward/Leeward Low/Med817.80.7337
5-Band Windward/Leeward Medium709.10.8461
5-Band Windward/Leeward Med/High645.30.9298
5-Band Windward/Leeward High606.10.9899
Windward/Leeward 60-40 Low1105.30.5428
Windward/Leeward 60-40 Low/Med832.30.7209
Windward/Leeward 60-40 Medium728.90.8232
Windward/Leeward 60-40 Med/High671.00.8942
Windward/Leeward 60-40 High638.70.9394
5-Band AP Low803.70.7466
5-Band AP Low/Med646.70.9278
5-Band AP Medium572.71.0477
5-Band AP Med/High527.01.1385
5-Band AP High499.41.2015
5-Band SF Bay Tour - Low947.80.6330
5-Band SF Bay Tour - Low/Med783.30.7660
5-Band SF Bay Tour - Medium684.20.8769
5-Band SF Bay Tour - Med/High625.80.9587
5-Band SF Bay Tour - High591.31.0147
Chicago-Mac Upwind0.8778
Chicago-Mac All Purpose0.9220
Chicago-Mac Downwind0.9633
Bayview-Mac Cove Island0.6818
Bayview-Mac Shore0.6865
Harvest Moon Regatta494.21.2141
Double HandedClub Certificate2025
HebbesNED 7873
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassOne OffMeasurement12/10/2008HINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA9.150Max. Beam3.002Draft2.183Displacement2,812Wetted area18.62IMS L8.660LSM08.587Acc. length9.150Sink (kg/mm) 14.13
VCGD-0.020VCGM-0.023RM Rated (kg·m) 67.9Limit of positive stability(°) N/AStability IndexN/ADefault crew weight170Declared crew weightN/A
PROPELLER
Propeller TypeFolding 2 blades
InstallationIn ApertureTwin screwNoHydro generatorNo
PRD0.375PBWPIPA0.0068
APHAPTAPB
RIG
Forestay tensionAftInner stayNone FittedMast materialCarbonSingle headsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays1CheckstaysSpreaders2Rotating mastNo
P11.030IG11.420ISP12.520MDT10.080MDL10.160MDT2MDL2TLTaperMWGO
E4.140J3.280BAS1.280FSDFoilSFJ0.000SPL0.000WPLTPS4.280BDMWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date12/10/2008
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Double HandedClub Certificate2025
HebbesNED 7873
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment011.241.562.253.173.9432.97
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment20250.040.490.951.872.773.6311.00NoNo 20.37
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment0213.3211.7012.517.087.6093%74.890112.1511.2611.715.086.7575%52.81
CRUISER/RACER REQUIREMENTS*
Accommodation length9.2 mTable area0.44 m²Headroom1.64 mMinimum number of berths4Personal gear stowage0.16 m³Fresh water capacity64 lMinimum number of seats in cockpit4Food stowage0.24 m³Fuel capacity34 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.