Double HandedClub Certificate2025
MareNED 8730
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 Angles44.7°44.7°42.6°41.3°40.4°39.9°39.6°39.7°40.8°
Beat VMG2.323.254.014.584.985.215.305.345.24
52°3.685.026.046.797.277.547.657.727.69
60°3.945.336.347.057.507.767.907.997.99
75°4.135.556.557.257.697.978.178.398.47
90°4.195.726.857.587.998.248.418.688.95
110°4.105.636.817.638.118.498.839.339.77
120°3.915.436.657.508.028.438.829.5710.20
135°3.444.866.087.057.728.178.579.3810.31
150°2.834.105.266.307.167.758.178.949.78
Run VMG2.453.554.555.466.266.917.458.248.94
Gybe Angles143.5°143.5°149.4°151.1°155.6°161.9°167.3°176.3°176.3°
APH ToD:549.7CDL: 9.957APH ToT: 1.0914CertNo:
BOAT
ClassDufour 425 GLDesignerU. FelciBuilderDufourAge date02/2007Series date01/2006Offset fileDUF425CL.OFFData fileNED8730
HULL
Length Overall12.600 mMaximum Beam4.170 mDraft2.127 mDisplacement9,454 kgDLR6.5163IMS DivisionCruiser/RacerDynamic Allowance0.370%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 3 bladesDiameter0.460m
CREW
Maximum weight180 kg(declared)Minimum weight120 kg ✱ when appliedNon Manual PowerSailsCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail39.9540.90Headsail Luffed40.5240.52Headsail FlyingSymmetric111.99111.99Asymmetric88.6791.63 (1 asymmetric(s) with SHW/SFL < 85%)
STORM SAIL AREAS (m²)
Trysail11.26Storm Jib11.00Heavy Weather Jib29.70
SAIL LIMITS
Headsails6
✱ One set on the forestay
Spinnakers5
✱ Asymmetric SHALL NOT be tacked on the pole
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
MareNED 8730
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 VMG1550.41108.3898.0786.0722.3690.9678.6674.2687.6
52°978.7717.0595.7530.2495.0477.7470.4466.1468.1
60°912.7675.9568.2510.3479.7464.0455.9450.8450.6
75°871.7649.2549.4496.3468.0451.6440.8429.2424.9
90°858.3629.6525.4474.9450.8436.8428.1414.5402.3
110°877.8639.3528.5472.1444.1424.3407.8385.9368.4
120°921.3662.9541.3479.7448.7427.2408.3376.1352.9
135°1046.2740.4592.2510.5466.4440.7420.2384.0349.0
150°1271.1878.8684.8571.8502.8464.6440.7402.8368.3
Run VMG1468.31014.7790.8659.9575.0520.6483.3437.0402.7
Selected Courses
Windward / Leeward1508.71061.5844.4723.0648.6605.8581.0555.6545.2
All purpose1133.1810.6656.6573.2525.8498.9482.6463.0451.4
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward683.70.8775
All purpose549.71.0914
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low733.60.8179
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High479.31.2518
Triple Number Windward/Leeward Low953.00.6296
Triple Number Windward/Leeward Medium679.00.8836
Triple Number Windward/Leeward High577.61.0387
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance601.00.9983
Triple Number Coastal/Long Distance Low733.60.8179
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High479.31.2518
Triple Number Windward/Leeward Low953.00.6296
Triple Number Windward/Leeward Medium679.00.8836
Triple Number Windward/Leeward High577.61.0387
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1600.01056.8791.5648.4562.7518.1487.2441.0427.2
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7556
Downwind "popa"0.9372
70% up, 30% down "Ilhabela"0.8023
30% up, 70% down "Ilhabela-inverso"0.8742
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low733.60.8179
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High479.31.2518
Triple Number Windward/Leeward Low953.00.6296
Triple Number Windward/Leeward Medium679.00.8836
Triple Number Windward/Leeward High577.61.0387
Predominantly Upwind599.41.0009
Predominantly Downwind557.41.0764
Custom scoring options for Canada
Scoring OptionTODTOT
TriNum AP Low733.60.8179
TriNum AP Med545.81.0992
TriNum AP High479.31.2518
TriNum W/L Low996.40.6021
TriNum W/L Med679.00.8836
TriNum W/L Hig577.61.0387
Predom. Upwind626.50.9577
Predom. Reaching545.71.0994
Predom. Downwind584.01.0274
Predom. Up Low899.60.6670
Predom. Up L/M670.80.8944
Predom. Up Med575.91.0418
Predom. Up M/H529.51.1332
Predom. Up High515.21.1646
Predom. Dn Low883.30.6792
Predom. Dn L/M640.50.9368
Predom. Dn Med533.91.1239
Predom. Dn M/H471.01.2738
Predom. Dn High438.91.3670
Predom. Rc Low783.90.7654
Predom. Rc L/M585.51.0247
Predom. Rc Med503.91.1906
Predom. Rc M/H460.11.3042
Predom. Rc High438.61.3680
SA/DSPL Upwind17.87SA/DSPL Downwind33.73
Scoring OptionTODTOT
5B W/L Low1119.20.5361
5B W/L L/M804.70.7457
5B W/L Med664.50.9029
5B W/L M/H586.61.0229
5B W/L High558.21.0749
W/L 60-40 Low1128.60.5316
W/L 60-40 L/M816.40.7349
W/L 60-40 Med679.40.8832
W/L 60-40 M/H606.00.9902
W/L 60-40 High582.01.0309
5B AP Low811.60.7393
5B AP L/M630.60.9515
5B AP Med536.51.1185
5B AP M/H485.61.2355
5B AP High464.41.2921
5B SF Bay Low962.50.6234
5B SF Bay L/M769.50.7797
5B SF Bay Med641.50.9353
5B SF Bay M/H572.61.0479
5B SF Bay High547.41.0961
Chicago-Mac Upwind0.9229
Chicago-Mac All Purpose0.9583
Chicago-Mac Downwind0.9862
BayMac Cove Island878.90.6827
BayMac Shore872.20.6879
Harvest Moon469.71.2775
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance601.00.9983
Triple Number Coastal/Long Distance Low733.60.8179
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High479.31.2518
Triple Number Windward/Leeward Low953.00.6296
Triple Number Windward/Leeward Medium679.00.8836
Triple Number Windward/Leeward High577.61.0387
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1600.01056.8791.5648.4562.7518.1487.2441.0427.2
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance601.00.9983
Triple Number Coastal/Long Distance Low733.60.8179
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High479.31.2518
Triple Number Windward/Leeward Low953.00.6296
Triple Number Windward/Leeward Medium679.00.8836
Triple Number Windward/Leeward High577.61.0387
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1600.01056.8791.5648.4562.7518.1487.2441.0427.2
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance601.0
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1600.01056.8791.5648.4562.7518.1487.2441.0427.2
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low733.60.8179
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High479.31.2518
Triple Number Windward/Leeward Low953.00.6296
Triple Number Windward/Leeward Medium679.00.8836
Triple Number Windward/Leeward High577.61.0387
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating601.00.9983
FinRating, kevyt tuuli1096.80.9117
FinRating, kova tuuli467.01.0706
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low733.60.8179
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High479.31.2518
Triple Number Windward/Leeward Low953.00.6296
Triple Number Windward/Leeward Medium679.00.8836
Triple Number Windward/Leeward High577.61.0387
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9983
Triple Number Coastal/Long Distance Low0.8179
Triple Number Coastal/Long Distance Medium1.0994
Triple Number Coastal/Long Distance High1.2518
Triple Number Windward/Leeward Low0.6296
Triple Number Windward/Leeward Medium0.8836
Triple Number Windward/Leeward High1.0387
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1600.01056.8791.5648.4562.7518.1487.2441.0427.2
For information
General Purpose Handicap (GPH)622.5
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance601.00.9983
Triple Number Coastal/Long Distance Low733.60.8179
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High479.31.2518
Triple Number Windward/Leeward Low953.00.6296
Triple Number Windward/Leeward Medium679.00.8836
Triple Number Windward/Leeward High577.61.0387
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1600.01056.8791.5648.4562.7518.1487.2441.0427.2
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low733.60.8179
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High479.31.2518
Triple Number Windward/Leeward Low953.00.6296
Triple Number Windward/Leeward Medium679.00.8836
Triple Number Windward/Leeward High577.61.0387
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance601.00.9983
Triple Number Coastal/Long Distance Low733.60.8179
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High479.31.2518
Triple Number Windward/Leeward Low953.00.6296
Triple Number Windward/Leeward Medium679.00.8836
Triple Number Windward/Leeward High577.61.0387
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1600.01056.8791.5648.4562.7518.1487.2441.0427.2
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance601.00.9983
Triple Number Coastal/Long Distance Low733.60.8179
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High479.31.2518
Triple Number Windward/Leeward Low953.00.6296
Triple Number Windward/Leeward Medium679.00.8836
Triple Number Windward/Leeward High577.61.0387
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1600.01056.8791.5648.4562.7518.1487.2441.0427.2
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low733.6
Triple Number Coastal/Long Distance Medium545.8
Triple Number Coastal/Long Distance High479.3
Triple Number Windward/Leeward Low953.0
Triple Number Windward/Leeward Medium679.0
Triple Number Windward/Leeward High577.6
Predominantly Upwind599.4
Predominantly Downwind557.4
Predominantly Reaching532.2
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance601.00.9983
Triple Number Coastal/Long Distance Low733.60.8179
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High479.31.2518
Triple Number Windward/Leeward Low953.00.6296
Triple Number Windward/Leeward Medium679.00.8836
Triple Number Windward/Leeward High577.61.0387
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1600.01056.8791.5648.4562.7518.1487.2441.0427.2
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8179
Triple Number Coastal/Long Distance Medium1.0994
Triple Number Coastal/Long Distance High1.2518
Triple Number Windward/Leeward Low0.6296
Triple Number Windward/Leeward Medium0.8836
Triple Number Windward/Leeward High1.0387
Coastal/Long Distance0.9983
Predominantly Upwind1.0009
Predominantly Downwind1.0764
For information
General Purpose Handicap (GPH)622.5
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0914
Distanseseilas Trippeltall svak vind0.8179
Distanseseilas Trippeltall mellomvind1.0994
Distanseseilas Trippeltall sterk vind1.2518
Pølsebane Trippeltall svak vind0.6296
Pølsebane Trippeltall mellomvind0.8836
Pølsebane Trippeltall sterk vind1.0387
Motvind Singeltall1.0009
Medvind Singeltall1.0764
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low733.60.8179
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High479.31.2518
Triple Number Windward/Leeward Low953.00.6296
Triple Number Windward/Leeward Medium679.00.8836
Triple Number Windward/Leeward High577.61.0387
Coastal/Long Distance601.00.9983
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind599.41.0009
Predominantly Downwind557.41.0764
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore548.31.0943
Cape Doctor Coastal454.91.3190
Triple Number Coastal/Long Distance Low733.60.8179
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High479.31.2518
Triple Number Windward/Leeward Low953.00.6296
Triple Number Windward/Leeward Medium679.00.8836
Triple Number Windward/Leeward High577.61.0387
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8179
Triple Number Coastal/Long Distance Medium1.0994
Triple Number Coastal/Long Distance High1.2518
Triple Number Windward/Leeward Low0.6296
Triple Number Windward/Leeward Medium0.8836
Triple Number Windward/Leeward High1.0387
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8179
Triple Number Coastal/Long Distance Medium1.0994
Triple Number Coastal/Long Distance High1.2518
Triple Number Windward/Leeward Low0.6296
Triple Number Windward/Leeward Medium0.8836
Triple Number Windward/Leeward High1.0387
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance601.00.9983
Triple Number Coastal/Long Distance Low733.60.8179
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High479.31.2518
Triple Number Windward/Leeward Low953.00.6296
Triple Number Windward/Leeward Medium679.00.8836
Triple Number Windward/Leeward High577.61.0387
Predominantly Upwind599.41.0009
Predominantly Downwind557.41.0764
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1600.01056.8791.5648.4562.7518.1487.2441.0427.2
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance601.00.9983
Triple Number Coastal/Long Distance Low733.60.8179
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High479.31.2518
Triple Number Windward/Leeward Low953.00.6296
Triple Number Windward/Leeward Medium679.00.8836
Triple Number Windward/Leeward High577.61.0387
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1600.01056.8791.5648.4562.7518.1487.2441.0427.2
Custom scoring options for United States of America
Scoring OptionTODTOT
TriNum AP Low733.60.8179
TriNum AP Med545.81.0992
TriNum AP High479.31.2518
TriNum W/L Low996.40.6021
TriNum W/L Med679.00.8836
TriNum W/L Hig577.61.0387
Predom. Upwind626.50.9577
Predom. Reaching545.71.0994
Predom. Downwind584.01.0274
Predom. Up Low899.60.6670
Predom. Up L/M670.80.8944
Predom. Up Med575.91.0418
Predom. Up M/H529.51.1332
Predom. Up High515.21.1646
Predom. Dn Low883.30.6792
Predom. Dn L/M640.50.9368
Predom. Dn Med533.91.1239
Predom. Dn M/H471.01.2738
Predom. Dn High438.91.3670
Predom. Rc Low783.90.7654
Predom. Rc L/M585.51.0247
Predom. Rc Med503.91.1906
Predom. Rc M/H460.11.3042
Predom. Rc High438.61.3680
SA/DSPL Upwind17.87SA/DSPL Downwind33.73
Scoring OptionTODTOT
5B W/L Low1119.20.5361
5B W/L L/M804.70.7457
5B W/L Med664.50.9029
5B W/L M/H586.61.0229
5B W/L High558.21.0749
W/L 60-40 Low1128.60.5316
W/L 60-40 L/M816.40.7349
W/L 60-40 Med679.40.8832
W/L 60-40 M/H606.00.9902
W/L 60-40 High582.01.0309
5B AP Low811.60.7393
5B AP L/M630.60.9515
5B AP Med536.51.1185
5B AP M/H485.61.2355
5B AP High464.41.2921
5B SF Bay Low962.50.6234
5B SF Bay L/M769.50.7797
5B SF Bay Med641.50.9353
5B SF Bay M/H572.61.0479
5B SF Bay High547.41.0961
Chicago-Mac Upwind0.9229
Chicago-Mac All Purpose0.9583
Chicago-Mac Downwind0.9862
BayMac Cove Island878.90.6827
BayMac Shore872.20.6879
Harvest Moon469.71.2775
Double HandedClub Certificate2025
MareNED 8730
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassDufour 425 GLMeasurement11/03/2016HINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA12.600Max. Beam4.170Draft2.127Displacement9,454Wetted area34.40IMS L11.365LSM011.320Acc. length12.600Sink (kg/mm) 27.07
VCGD0.224VCGM0.154RM Rated (kg·m) 246.1Limit of positive stability(°) N/AStability IndexN/ADefault crew weight170Declared crew weight180
PROPELLER
Propeller TypeFolding 3 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.460PBWPIPA0.0009
EDLST1ST2
ST3ST4ST5
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0Checkstays0Spreaders2Rotating mastNo
P13.620IG14.830ISP15.290MDT10.130MDL10.235MDT2MDL2TLNo TaperMWGO
E4.720J4.730BAS1.680FSDFoilSFJ0.130SPL4.825WPLTPS5.650BDMWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date08/04/2022
BALLAST
TANKS
IdDescriptionCapacityLCGVCGSp.WghtLevel
Sailing
116010.000.8400
INVENTORY
IdDescriptionWeight SailingLCGVCGGAIdDescriptionWeight SailingLCGVCGGA1Volvo Penta 55 PK   
INVENTORY
Fixed Ballast Total0
TANKSIdDescriptionSp.WghtCapacityConditionLCGVCG1Fuel1602010.00Total deductible1710.00
OTHER ITEMSIdKindDescriptionWeightLCGVCG1Engine (IC)Volvo Penta 55 PKTotal deductible
Double HandedClub Certificate2025
MareNED 8730
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment20241.021.873.244.1639.95
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment20240.070.721.402.824.245.9614.08NoNo 40.52
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateComment115.2215.2215.228.908.55111.9930/01/2019
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment202515.4814.7515.126.638.6876%88.6728/03/2025
CRUISER/RACER REQUIREMENTS*
Accommodation length12.6 mTable area0.55 m²Headroom1.84 mMinimum number of berths5Personal gear stowage0.20 m³Fresh water capacity165 lMinimum number of seats in cockpit5Food stowage0.30 m³Fuel capacity102 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.