Double HandedClub Certificate2025
IJs Na!NED 6741
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 Angles43.4°43.4°41.3°40.4°39.7°39.1°38.9°38.9°39.8°
Beat VMG2.543.454.134.564.794.904.954.984.91
52°3.945.256.136.626.866.967.027.087.07
60°4.185.526.366.817.047.157.217.287.30
75°4.375.716.526.957.197.357.467.597.67
90°4.275.636.496.967.257.457.627.878.04
110°3.935.376.427.017.367.627.868.158.36
120°3.785.186.256.927.317.617.898.498.87
135°3.334.655.746.587.097.447.758.439.30
150°2.723.935.035.956.677.137.478.088.85
Run VMG2.363.414.365.185.906.506.957.608.18
Gybe Angles145.8°145.8°150.7°153.9°160.1°166.6°175.4°178.8°178.1°
APH ToD:581.1CDL: 8.655APH ToT: 1.0325CertNo:none
BOAT
ClassWinner 1120DesignerStadtBuilderWinnerAge date01/1997Series date03/1993Offset fileG_WN1120.bofData fileNED6741
HULL
Length Overall11.255 mMaximum Beam3.624 mDraft1.959 mDisplacement7,234 kgDLR8.9714IMS DivisionCruiser/RacerDynamic Allowance0.350%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.407m
CREW
Maximum weight170 kg(default)Minimum weight120 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail40.2040.90Headsail Luffed44.6944.69Headsail FlyingSymmetric82.8382.83Asymmetric
STORM SAIL AREAS (m²)
Trysail12.16Storm Jib9.20Heavy Weather Jib24.83
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
IJs Na!NED 6741
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 VMG1420.11042.8871.4789.2751.5734.7727.0723.0733.4
52°913.6685.7587.6543.6524.7517.0512.9508.6509.0
60°860.4652.4565.8528.7511.7503.6499.5494.3493.1
75°824.2630.4552.0517.8500.4489.5482.6474.2469.1
90°842.1639.4555.1517.0496.7483.1472.6457.5447.9
110°915.1670.7561.2513.6489.4472.2458.0441.5430.9
120°952.1694.3576.2520.2492.4473.2456.1423.9405.9
135°1081.7774.6627.4547.5507.5483.7464.7427.1387.0
150°1323.1914.9715.2604.6539.6504.6482.0445.5406.7
Run VMG1528.31056.5825.3694.9609.8554.3517.8473.8440.1
Selected Courses
Windward / Leeward1472.01049.6848.4742.0680.7644.5622.4598.4586.7
All purpose1109.1807.5668.2598.4561.1539.7525.8507.3495.2
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward711.00.8439
All purpose581.11.0325
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low737.90.8131
Triple Number Coastal/Long Distance Medium577.11.0397
Triple Number Coastal/Long Distance High522.41.1486
Triple Number Windward/Leeward Low949.10.6322
Triple Number Windward/Leeward Medium706.00.8498
Triple Number Windward/Leeward High618.90.9695
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance631.80.9497
Triple Number Coastal/Long Distance Low737.90.8131
Triple Number Coastal/Long Distance Medium577.11.0397
Triple Number Coastal/Long Distance High522.41.1486
Triple Number Windward/Leeward Low949.10.6322
Triple Number Windward/Leeward Medium706.00.8498
Triple Number Windward/Leeward High618.90.9695
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1568.71050.3799.3671.4598.2560.0531.5485.3472.3
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7447
Downwind "popa"0.8875
70% up, 30% down "Ilhabela"0.7825
30% up, 70% down "Ilhabela-inverso"0.8392
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low737.90.8131
Triple Number Coastal/Long Distance Medium577.11.0397
Triple Number Coastal/Long Distance High522.41.1486
Triple Number Windward/Leeward Low949.10.6322
Triple Number Windward/Leeward Medium706.00.8498
Triple Number Windward/Leeward High618.90.9695
Predominantly Upwind625.20.9597
Predominantly Downwind591.11.0151
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low737.90.8131
Triple Number AP Medium577.21.0395
Triple Number AP High522.41.1486
Triple Number Windward/Leeward Low990.90.6055
Triple Number Windward/Leeward Medium706.00.8498
Triple Number Windward/Leeward High618.90.9695
Single Number Predominant Upwind648.70.9249
Single Number Predominant Reaching578.01.0381
Single Number Predominant Downwind617.60.9716
Predominant Upwind - Low873.60.6868
Predominant Upwind - Low/Med678.90.8837
Predominant Upwind - Medium606.50.9893
Predominant Upwind - Med/High572.41.0483
Predominant Upwind - High559.11.0732
Predominant Downwind Low901.20.6658
Predominant Downwind Low/Med668.50.8975
Predominant Downwind Medium570.11.0524
Predominant Downwind Med/High511.91.1721
Predominant Downwind High480.11.2498
Predominant Reaching Low788.40.7610
Predominant Reaching Low/Med610.60.9827
Predominant Reaching Medium541.41.1082
Predominant Reaching Med/High503.11.1926
Predominant Reaching High481.51.2462
SA/DSPL Upwind22.55SA/DSPL Downwind32.68
Scoring OptionTODTOT
5-Band Windward/Leeward Low1105.50.5428
5-Band Windward/Leeward Low/Med815.80.7355
5-Band Windward/Leeward Medium693.90.8646
5-Band Windward/Leeward Med/High627.00.9570
5-Band Windward/Leeward High600.50.9991
Windward/Leeward 60-40 Low1103.20.5439
Windward/Leeward 60-40 Low/Med822.60.7294
Windward/Leeward 60-40 Medium707.70.8478
Windward/Leeward 60-40 Med/High647.50.9267
Windward/Leeward 60-40 High625.50.9592
5-Band AP Low815.50.7357
5-Band AP Low/Med648.30.9255
5-Band AP Medium569.71.0532
5-Band AP Med/High528.01.1364
5-Band AP High508.41.1802
5-Band SF Bay Tour - Low952.50.6299
5-Band SF Bay Tour - Low/Med780.30.7690
5-Band SF Bay Tour - Medium671.80.8932
5-Band SF Bay Tour - Med/High614.80.9760
5-Band SF Bay Tour - High591.31.0148
Chicago-Mac Upwind0.8988
Chicago-Mac All Purpose0.9212
Chicago-Mac Downwind0.9371
Bayview-Mac Cove Island0.6799
Bayview-Mac Shore0.6859
Harvest Moon Regatta508.61.1798
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance631.80.9497
Triple Number Coastal/Long Distance Low737.90.8131
Triple Number Coastal/Long Distance Medium577.11.0397
Triple Number Coastal/Long Distance High522.41.1486
Triple Number Windward/Leeward Low949.10.6322
Triple Number Windward/Leeward Medium706.00.8498
Triple Number Windward/Leeward High618.90.9695
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1568.71050.3799.3671.4598.2560.0531.5485.3472.3
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance631.80.9497
Triple Number Coastal/Long Distance Low737.90.8131
Triple Number Coastal/Long Distance Medium577.11.0397
Triple Number Coastal/Long Distance High522.41.1486
Triple Number Windward/Leeward Low949.10.6322
Triple Number Windward/Leeward Medium706.00.8498
Triple Number Windward/Leeward High618.90.9695
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1568.71050.3799.3671.4598.2560.0531.5485.3472.3
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance631.8
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1568.71050.3799.3671.4598.2560.0531.5485.3472.3
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low737.90.8131
Triple Number Coastal/Long Distance Medium577.11.0397
Triple Number Coastal/Long Distance High522.41.1486
Triple Number Windward/Leeward Low949.10.6322
Triple Number Windward/Leeward Medium706.00.8498
Triple Number Windward/Leeward High618.90.9695
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating (Coastal/Long Distance)631.80.9497
Triple Number Coastal/Long Distance Low737.90.8131
Triple Number Coastal/Long Distance Medium577.11.0397
Triple Number Coastal/Long Distance High522.41.1486
Triple Number Windward/Leeward Low949.10.6322
Triple Number Windward/Leeward Medium706.00.8498
Triple Number Windward/Leeward High618.90.9695
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1568.71050.3799.3671.4598.2560.0531.5485.3472.3
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low737.90.8131
Triple Number Coastal/Long Distance Medium577.11.0397
Triple Number Coastal/Long Distance High522.41.1486
Triple Number Windward/Leeward Low949.10.6322
Triple Number Windward/Leeward Medium706.00.8498
Triple Number Windward/Leeward High618.90.9695
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9497
Triple Number Coastal/Long Distance Low0.8131
Triple Number Coastal/Long Distance Medium1.0397
Triple Number Coastal/Long Distance High1.1486
Triple Number Windward/Leeward Low0.6322
Triple Number Windward/Leeward Medium0.8498
Triple Number Windward/Leeward High0.9695
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1568.71050.3799.3671.4598.2560.0531.5485.3472.3
For information
General Purpose Handicap (GPH)650.2
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance631.80.9497
Triple Number Coastal/Long Distance Low737.90.8131
Triple Number Coastal/Long Distance Medium577.11.0397
Triple Number Coastal/Long Distance High522.41.1486
Triple Number Windward/Leeward Low949.10.6322
Triple Number Windward/Leeward Medium706.00.8498
Triple Number Windward/Leeward High618.90.9695
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1568.71050.3799.3671.4598.2560.0531.5485.3472.3
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low737.90.8131
Triple Number Coastal/Long Distance Medium577.11.0397
Triple Number Coastal/Long Distance High522.41.1486
Triple Number Windward/Leeward Low949.10.6322
Triple Number Windward/Leeward Medium706.00.8498
Triple Number Windward/Leeward High618.90.9695
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance631.80.9497
Triple Number Coastal/Long Distance Low737.90.8131
Triple Number Coastal/Long Distance Medium577.11.0397
Triple Number Coastal/Long Distance High522.41.1486
Triple Number Windward/Leeward Low949.10.6322
Triple Number Windward/Leeward Medium706.00.8498
Triple Number Windward/Leeward High618.90.9695
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1568.71050.3799.3671.4598.2560.0531.5485.3472.3
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance631.80.9497
Triple Number Coastal/Long Distance Low737.90.8131
Triple Number Coastal/Long Distance Medium577.11.0397
Triple Number Coastal/Long Distance High522.41.1486
Triple Number Windward/Leeward Low949.10.6322
Triple Number Windward/Leeward Medium706.00.8498
Triple Number Windward/Leeward High618.90.9695
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1568.71050.3799.3671.4598.2560.0531.5485.3472.3
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low737.9
Triple Number Coastal/Long Distance Medium577.1
Triple Number Coastal/Long Distance High522.4
Triple Number Windward/Leeward Low949.1
Triple Number Windward/Leeward Medium706.0
Triple Number Windward/Leeward High618.9
Predominantly Upwind625.2
Predominantly Downwind591.1
Predominantly Reaching566.9
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance631.80.9497
Triple Number Coastal/Long Distance Low737.90.8131
Triple Number Coastal/Long Distance Medium577.11.0397
Triple Number Coastal/Long Distance High522.41.1486
Triple Number Windward/Leeward Low949.10.6322
Triple Number Windward/Leeward Medium706.00.8498
Triple Number Windward/Leeward High618.90.9695
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1568.71050.3799.3671.4598.2560.0531.5485.3472.3
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8131
Triple Number Coastal/Long Distance Medium1.0397
Triple Number Coastal/Long Distance High1.1486
Triple Number Windward/Leeward Low0.6322
Triple Number Windward/Leeward Medium0.8498
Triple Number Windward/Leeward High0.9695
Coastal/Long Distance0.9497
Predominantly Upwind0.9597
Predominantly Downwind1.0151
For information
General Purpose Handicap (GPH)650.2
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0325
Distanseseilas Trippeltall svak vind0.8131
Distanseseilas Trippeltall mellomvind1.0397
Distanseseilas Trippeltall sterk vind1.1486
Pølsebane Trippeltall svak vind0.6322
Pølsebane Trippeltall mellomvind0.8498
Pølsebane Trippeltall sterk vind0.9695
Motvind Singeltall0.9597
Medvind Singeltall1.0151
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low737.90.8131
Triple Number Coastal/Long Distance Medium577.11.0397
Triple Number Coastal/Long Distance High522.41.1486
Triple Number Windward/Leeward Low949.10.6322
Triple Number Windward/Leeward Medium706.00.8498
Triple Number Windward/Leeward High618.90.9695
Coastal/Long Distance631.80.9497
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind625.20.9597
Predominantly Downwind591.11.0151
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore590.21.0165
Cape Doctor Coastal498.81.2029
Triple Number Coastal/Long Distance Low737.90.8131
Triple Number Coastal/Long Distance Medium577.11.0397
Triple Number Coastal/Long Distance High522.41.1486
Triple Number Windward/Leeward Low949.10.6322
Triple Number Windward/Leeward Medium706.00.8498
Triple Number Windward/Leeward High618.90.9695
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8131
Triple Number Coastal/Long Distance Medium1.0397
Triple Number Coastal/Long Distance High1.1486
Triple Number Windward/Leeward Low0.6322
Triple Number Windward/Leeward Medium0.8498
Triple Number Windward/Leeward High0.9695
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8131
Triple Number Coastal/Long Distance Medium1.0397
Triple Number Coastal/Long Distance High1.1486
Triple Number Windward/Leeward Low0.6322
Triple Number Windward/Leeward Medium0.8498
Triple Number Windward/Leeward High0.9695
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance631.80.9497
Triple Number Coastal/Long Distance Low737.90.8131
Triple Number Coastal/Long Distance Medium577.11.0397
Triple Number Coastal/Long Distance High522.41.1486
Triple Number Windward/Leeward Low949.10.6322
Triple Number Windward/Leeward Medium706.00.8498
Triple Number Windward/Leeward High618.90.9695
Predominantly Upwind625.20.9597
Predominantly Downwind591.11.0151
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1568.71050.3799.3671.4598.2560.0531.5485.3472.3
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance631.80.9497
Triple Number Coastal/Long Distance Low737.90.8131
Triple Number Coastal/Long Distance Medium577.11.0397
Triple Number Coastal/Long Distance High522.41.1486
Triple Number Windward/Leeward Low949.10.6322
Triple Number Windward/Leeward Medium706.00.8498
Triple Number Windward/Leeward High618.90.9695
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1568.71050.3799.3671.4598.2560.0531.5485.3472.3
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low737.90.8131
Triple Number AP Medium577.21.0395
Triple Number AP High522.41.1486
Triple Number Windward/Leeward Low990.90.6055
Triple Number Windward/Leeward Medium706.00.8498
Triple Number Windward/Leeward High618.90.9695
Single Number Predominant Upwind648.70.9249
Single Number Predominant Reaching578.01.0381
Single Number Predominant Downwind617.60.9716
Predominant Upwind - Low873.60.6868
Predominant Upwind - Low/Med678.90.8837
Predominant Upwind - Medium606.50.9893
Predominant Upwind - Med/High572.41.0483
Predominant Upwind - High559.11.0732
Predominant Downwind Low901.20.6658
Predominant Downwind Low/Med668.50.8975
Predominant Downwind Medium570.11.0524
Predominant Downwind Med/High511.91.1721
Predominant Downwind High480.11.2498
Predominant Reaching Low788.40.7610
Predominant Reaching Low/Med610.60.9827
Predominant Reaching Medium541.41.1082
Predominant Reaching Med/High503.11.1926
Predominant Reaching High481.51.2462
SA/DSPL Upwind22.55SA/DSPL Downwind32.68
Scoring OptionTODTOT
5-Band Windward/Leeward Low1105.50.5428
5-Band Windward/Leeward Low/Med815.80.7355
5-Band Windward/Leeward Medium693.90.8646
5-Band Windward/Leeward Med/High627.00.9570
5-Band Windward/Leeward High600.50.9991
Windward/Leeward 60-40 Low1103.20.5439
Windward/Leeward 60-40 Low/Med822.60.7294
Windward/Leeward 60-40 Medium707.70.8478
Windward/Leeward 60-40 Med/High647.50.9267
Windward/Leeward 60-40 High625.50.9592
5-Band AP Low815.50.7357
5-Band AP Low/Med648.30.9255
5-Band AP Medium569.71.0532
5-Band AP Med/High528.01.1364
5-Band AP High508.41.1802
5-Band SF Bay Tour - Low952.50.6299
5-Band SF Bay Tour - Low/Med780.30.7690
5-Band SF Bay Tour - Medium671.80.8932
5-Band SF Bay Tour - Med/High614.80.9760
5-Band SF Bay Tour - High591.31.0148
Chicago-Mac Upwind0.8988
Chicago-Mac All Purpose0.9212
Chicago-Mac Downwind0.9371
Bayview-Mac Cove Island0.6799
Bayview-Mac Shore0.6859
Harvest Moon Regatta508.61.1798
Double HandedClub Certificate2025
IJs Na!NED 6741
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassWinner 1120Measurement12/05/2001HINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA11.255Max. Beam3.624Draft1.959Displacement7,234Wetted area28.51IMS L9.414LSM09.306Acc. length11.255Sink (kg/mm) 20.47
VCGD-0.117VCGM-0.038RM Rated (kg·m) 165.6Limit of positive stability(°) N/AStability IndexN/ADefault crew weight170Declared crew weightN/A
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.407PBWPIPA0.0006
EDLST1ST2
ST3ST4ST5
RIG
Forestay tensionFixedInner stayNone FittedMast materialAluminumSingle headsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders2Rotating mastNo
P14.000IG13.560ISP13.650MDT10.110MDL10.220MDT2MDL2TLTaperMWGO
E4.960J4.080BAS1.650FSDFoilSFJSPL4.060WPLTPSBDMWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date12/05/2001
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Double HandedClub Certificate2025
IJs Na!NED 6741
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentORC0.171.001.793.044.0840.20* Copied from legacy *
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentORC6.200.00NoNo 44.69* Copied from legacy *
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateCommentORC0.0082.83* Auto Added *
CRUISER/RACER REQUIREMENTS*
Accommodation length11.3 mTable area0.55 m²Headroom1.78 mMinimum number of berths5Personal gear stowage0.20 m³Fresh water capacity133 lMinimum number of seats in cockpit5Food stowage0.30 m³Fuel capacity76 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.