Double HandedClub Certificate2025
ModocNED 28FF
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 Angles43.2°43.2°41.1°39.8°39.3°39.7°40.4°43.2°46.0°
Beat VMG2.072.863.483.884.004.023.993.933.75
52°3.254.365.145.605.775.825.845.865.78
60°3.464.595.345.765.986.056.096.156.09
75°3.594.745.485.906.226.436.536.666.69
90°3.534.765.626.136.476.666.887.197.37
110°3.564.805.676.226.747.277.728.368.80
120°3.404.645.546.096.617.187.849.4410.85
135°2.964.165.135.776.266.767.339.0812.84
150°2.453.534.505.275.876.326.797.9610.89
Run VMG2.123.063.894.605.275.756.177.059.43
Gybe Angles145.6°145.6°148.3°157.5°163.5°169.8°170.0°164.9°139.6°
APH ToD:669.6CDL: 5.809APH ToT: 0.8961CertNo:
BOAT
ClassF & F 65 STDDesignerJac de RidderBuilderF&F BoatsAge date01/2006Series date04/1992Offset fileh191.offData fileNED28FF
HULL
Length Overall6.499 mMaximum Beam2.510 mDraft1.240 mDisplacement891 kgDLR4.3255IMS DivisionSportboatDynamic Allowance0.230%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)
MeasuredRatedMainsail13.3213.60Headsail Luffed12.5412.54Headsail FlyingSymmetric30.0330.03Asymmetric20.3825.45 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail3.90Storm Jib2.58Heavy Weather Jib6.95
SAIL LIMITS
Headsails5Spinnakers4
✱ 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
ModocNED 28FF
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 VMG1738.21259.31035.7928.7899.1895.9902.8916.5959.4
52°1107.8825.5700.7642.5623.4618.3616.4614.4623.0
60°1039.7783.7674.7624.8602.3595.3591.1585.6591.4
75°1002.0759.0657.5610.4578.5560.0551.7540.7537.8
90°1019.1756.0640.4587.6556.5540.6523.1500.8488.5
110°1012.4750.6635.0578.9534.1495.4466.5430.4409.0
120°1057.8776.4650.4591.1544.3501.6459.0381.2331.9
135°1216.1866.2702.2623.6575.0532.7491.2396.4280.3
150°1468.91018.9800.5683.5613.4569.2530.1452.2330.7
Run VMG1695.61176.6924.3782.9683.7626.2583.9510.3381.8
Selected Courses
Windward / Leeward1715.31217.9980.0855.8791.4761.0743.3713.4670.6
All purpose1295.9938.7772.9690.6646.6621.7603.2571.3540.4
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward829.70.7231
All purpose669.60.8961
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low855.80.7011
Triple Number Coastal/Long Distance Medium665.60.9015
Triple Number Coastal/Long Distance High595.81.0070
Triple Number Windward/Leeward Low1098.90.5460
Triple Number Windward/Leeward Medium821.00.7308
Triple Number Windward/Leeward High736.60.8146
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance728.30.8238
Triple Number Coastal/Long Distance Low855.80.7011
Triple Number Coastal/Long Distance Medium665.60.9015
Triple Number Coastal/Long Distance High595.81.0070
Triple Number Windward/Leeward Low1098.90.5460
Triple Number Windward/Leeward Medium821.00.7308
Triple Number Windward/Leeward High736.60.8146
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1815.41213.8922.3774.4692.0647.2607.0529.8495.7
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6142
Downwind "popa"0.7943
70% up, 30% down "Ilhabela"0.6590
30% up, 70% down "Ilhabela-inverso"0.7301
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low855.80.7011
Triple Number Coastal/Long Distance Medium665.60.9015
Triple Number Coastal/Long Distance High595.81.0070
Triple Number Windward/Leeward Low1098.90.5460
Triple Number Windward/Leeward Medium821.00.7308
Triple Number Windward/Leeward High736.60.8146
Predominantly Upwind734.90.8164
Predominantly Downwind670.80.8945
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low855.80.7011
Triple Number AP Medium665.60.9014
Triple Number AP High595.91.0070
Triple Number Windward/Leeward Low1148.40.5225
Triple Number Windward/Leeward Medium821.00.7308
Triple Number Windward/Leeward High736.60.8146
Single Number Predominant Upwind764.60.7847
Single Number Predominant Reaching660.40.9085
Single Number Predominant Downwind698.10.8594
Predominant Upwind - Low1036.20.5790
Predominant Upwind - Low/Med795.90.7539
Predominant Upwind - Medium712.00.8427
Predominant Upwind - Med/High678.50.8844
Predominant Upwind - High663.10.9049
Predominant Downwind Low1028.10.5836
Predominant Downwind Low/Med761.90.7875
Predominant Downwind Medium649.00.9245
Predominant Downwind Med/High573.11.0470
Predominant Downwind High510.71.1749
Predominant Reaching Low917.80.6537
Predominant Reaching Low/Med703.00.8534
Predominant Reaching Medium619.40.9687
Predominant Reaching Med/High566.81.0585
Predominant Reaching High525.61.1415
SA/DSPL Upwind27.94SA/DSPL Downwind46.82
Scoring OptionTODTOT
5-Band Windward/Leeward Low1283.20.4676
5-Band Windward/Leeward Low/Med943.40.6360
5-Band Windward/Leeward Medium808.80.7419
5-Band Windward/Leeward Med/High745.30.8051
5-Band Windward/Leeward High711.20.8437
Windward/Leeward 60-40 Low1291.20.4647
Windward/Leeward 60-40 Low/Med956.90.6270
Windward/Leeward 60-40 Medium830.00.7229
Windward/Leeward 60-40 Med/High776.90.7723
Windward/Leeward 60-40 High753.20.7966
5-Band AP Low943.10.6362
5-Band AP Low/Med749.70.8004
5-Band AP Medium656.70.9137
5-Band AP Med/High604.60.9924
5-Band AP High571.51.0500
5-Band SF Bay Tour - Low1107.30.5419
5-Band SF Bay Tour - Low/Med904.50.6633
5-Band SF Bay Tour - Medium783.80.7655
5-Band SF Bay Tour - Med/High726.30.8261
5-Band SF Bay Tour - High693.00.8658
Chicago-Mac Upwind0.7638
Chicago-Mac All Purpose0.7973
Chicago-Mac Downwind0.8263
Bayview-Mac Cove Island0.5839
Bayview-Mac Shore0.5881
Harvest Moon Regatta563.51.0647
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance728.30.8238
Triple Number Coastal/Long Distance Low855.80.7011
Triple Number Coastal/Long Distance Medium665.60.9015
Triple Number Coastal/Long Distance High595.81.0070
Triple Number Windward/Leeward Low1098.90.5460
Triple Number Windward/Leeward Medium821.00.7308
Triple Number Windward/Leeward High736.60.8146
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1815.41213.8922.3774.4692.0647.2607.0529.8495.7
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance728.30.8238
Triple Number Coastal/Long Distance Low855.80.7011
Triple Number Coastal/Long Distance Medium665.60.9015
Triple Number Coastal/Long Distance High595.81.0070
Triple Number Windward/Leeward Low1098.90.5460
Triple Number Windward/Leeward Medium821.00.7308
Triple Number Windward/Leeward High736.60.8146
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1815.41213.8922.3774.4692.0647.2607.0529.8495.7
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance728.3
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1815.41213.8922.3774.4692.0647.2607.0529.8495.7
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low855.80.7011
Triple Number Coastal/Long Distance Medium665.60.9015
Triple Number Coastal/Long Distance High595.81.0070
Triple Number Windward/Leeward Low1098.90.5460
Triple Number Windward/Leeward Medium821.00.7308
Triple Number Windward/Leeward High736.60.8146
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating728.30.8238
FinRating, kevyt tuuli1259.50.7939
FinRating, kova tuuli567.30.8813
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low855.80.7011
Triple Number Coastal/Long Distance Medium665.60.9015
Triple Number Coastal/Long Distance High595.81.0070
Triple Number Windward/Leeward Low1098.90.5460
Triple Number Windward/Leeward Medium821.00.7308
Triple Number Windward/Leeward High736.60.8146
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8238
Triple Number Coastal/Long Distance Low0.7011
Triple Number Coastal/Long Distance Medium0.9015
Triple Number Coastal/Long Distance High1.0070
Triple Number Windward/Leeward Low0.5460
Triple Number Windward/Leeward Medium0.7308
Triple Number Windward/Leeward High0.8146
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1815.41213.8922.3774.4692.0647.2607.0529.8495.7
For information
General Purpose Handicap (GPH)750.6
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance728.30.8238
Triple Number Coastal/Long Distance Low855.80.7011
Triple Number Coastal/Long Distance Medium665.60.9015
Triple Number Coastal/Long Distance High595.81.0070
Triple Number Windward/Leeward Low1098.90.5460
Triple Number Windward/Leeward Medium821.00.7308
Triple Number Windward/Leeward High736.60.8146
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1815.41213.8922.3774.4692.0647.2607.0529.8495.7
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low855.80.7011
Triple Number Coastal/Long Distance Medium665.60.9015
Triple Number Coastal/Long Distance High595.81.0070
Triple Number Windward/Leeward Low1098.90.5460
Triple Number Windward/Leeward Medium821.00.7308
Triple Number Windward/Leeward High736.60.8146
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance728.30.8238
Triple Number Coastal/Long Distance Low855.80.7011
Triple Number Coastal/Long Distance Medium665.60.9015
Triple Number Coastal/Long Distance High595.81.0070
Triple Number Windward/Leeward Low1098.90.5460
Triple Number Windward/Leeward Medium821.00.7308
Triple Number Windward/Leeward High736.60.8146
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1815.41213.8922.3774.4692.0647.2607.0529.8495.7
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance728.30.8238
Triple Number Coastal/Long Distance Low855.80.7011
Triple Number Coastal/Long Distance Medium665.60.9015
Triple Number Coastal/Long Distance High595.81.0070
Triple Number Windward/Leeward Low1098.90.5460
Triple Number Windward/Leeward Medium821.00.7308
Triple Number Windward/Leeward High736.60.8146
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1815.41213.8922.3774.4692.0647.2607.0529.8495.7
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low855.8
Triple Number Coastal/Long Distance Medium665.6
Triple Number Coastal/Long Distance High595.8
Triple Number Windward/Leeward Low1098.9
Triple Number Windward/Leeward Medium821.0
Triple Number Windward/Leeward High736.6
Predominantly Upwind734.9
Predominantly Downwind670.8
Predominantly Reaching644.6
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance728.30.8238
Triple Number Coastal/Long Distance Low855.80.7011
Triple Number Coastal/Long Distance Medium665.60.9015
Triple Number Coastal/Long Distance High595.81.0070
Triple Number Windward/Leeward Low1098.90.5460
Triple Number Windward/Leeward Medium821.00.7308
Triple Number Windward/Leeward High736.60.8146
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1815.41213.8922.3774.4692.0647.2607.0529.8495.7
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7011
Triple Number Coastal/Long Distance Medium0.9015
Triple Number Coastal/Long Distance High1.0070
Triple Number Windward/Leeward Low0.5460
Triple Number Windward/Leeward Medium0.7308
Triple Number Windward/Leeward High0.8146
Coastal/Long Distance0.8238
Predominantly Upwind0.8164
Predominantly Downwind0.8945
For information
General Purpose Handicap (GPH)750.6
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.8961
Distanseseilas Trippeltall svak vind0.7011
Distanseseilas Trippeltall mellomvind0.9015
Distanseseilas Trippeltall sterk vind1.0070
Pølsebane Trippeltall svak vind0.5460
Pølsebane Trippeltall mellomvind0.7308
Pølsebane Trippeltall sterk vind0.8146
Motvind Singeltall0.8164
Medvind Singeltall0.8945
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low855.80.7011
Triple Number Coastal/Long Distance Medium665.60.9015
Triple Number Coastal/Long Distance High595.81.0070
Triple Number Windward/Leeward Low1098.90.5460
Triple Number Windward/Leeward Medium821.00.7308
Triple Number Windward/Leeward High736.60.8146
Coastal/Long Distance728.30.8238
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind734.90.8164
Predominantly Downwind670.80.8945
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore683.40.8779
Cape Doctor Coastal549.71.0916
Triple Number Coastal/Long Distance Low855.80.7011
Triple Number Coastal/Long Distance Medium665.60.9015
Triple Number Coastal/Long Distance High595.81.0070
Triple Number Windward/Leeward Low1098.90.5460
Triple Number Windward/Leeward Medium821.00.7308
Triple Number Windward/Leeward High736.60.8146
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7011
Triple Number Coastal/Long Distance Medium0.9015
Triple Number Coastal/Long Distance High1.0070
Triple Number Windward/Leeward Low0.5460
Triple Number Windward/Leeward Medium0.7308
Triple Number Windward/Leeward High0.8146
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7011
Triple Number Coastal/Long Distance Medium0.9015
Triple Number Coastal/Long Distance High1.0070
Triple Number Windward/Leeward Low0.5460
Triple Number Windward/Leeward Medium0.7308
Triple Number Windward/Leeward High0.8146
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance728.30.8238
Triple Number Coastal/Long Distance Low855.80.7011
Triple Number Coastal/Long Distance Medium665.60.9015
Triple Number Coastal/Long Distance High595.81.0070
Triple Number Windward/Leeward Low1098.90.5460
Triple Number Windward/Leeward Medium821.00.7308
Triple Number Windward/Leeward High736.60.8146
Predominantly Upwind734.90.8164
Predominantly Downwind670.80.8945
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1815.41213.8922.3774.4692.0647.2607.0529.8495.7
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance728.30.8238
Triple Number Coastal/Long Distance Low855.80.7011
Triple Number Coastal/Long Distance Medium665.60.9015
Triple Number Coastal/Long Distance High595.81.0070
Triple Number Windward/Leeward Low1098.90.5460
Triple Number Windward/Leeward Medium821.00.7308
Triple Number Windward/Leeward High736.60.8146
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1815.41213.8922.3774.4692.0647.2607.0529.8495.7
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low855.80.7011
Triple Number AP Medium665.60.9014
Triple Number AP High595.91.0070
Triple Number Windward/Leeward Low1148.40.5225
Triple Number Windward/Leeward Medium821.00.7308
Triple Number Windward/Leeward High736.60.8146
Single Number Predominant Upwind764.60.7847
Single Number Predominant Reaching660.40.9085
Single Number Predominant Downwind698.10.8594
Predominant Upwind - Low1036.20.5790
Predominant Upwind - Low/Med795.90.7539
Predominant Upwind - Medium712.00.8427
Predominant Upwind - Med/High678.50.8844
Predominant Upwind - High663.10.9049
Predominant Downwind Low1028.10.5836
Predominant Downwind Low/Med761.90.7875
Predominant Downwind Medium649.00.9245
Predominant Downwind Med/High573.11.0470
Predominant Downwind High510.71.1749
Predominant Reaching Low917.80.6537
Predominant Reaching Low/Med703.00.8534
Predominant Reaching Medium619.40.9687
Predominant Reaching Med/High566.81.0585
Predominant Reaching High525.61.1415
SA/DSPL Upwind27.94SA/DSPL Downwind46.82
Scoring OptionTODTOT
5-Band Windward/Leeward Low1283.20.4676
5-Band Windward/Leeward Low/Med943.40.6360
5-Band Windward/Leeward Medium808.80.7419
5-Band Windward/Leeward Med/High745.30.8051
5-Band Windward/Leeward High711.20.8437
Windward/Leeward 60-40 Low1291.20.4647
Windward/Leeward 60-40 Low/Med956.90.6270
Windward/Leeward 60-40 Medium830.00.7229
Windward/Leeward 60-40 Med/High776.90.7723
Windward/Leeward 60-40 High753.20.7966
5-Band AP Low943.10.6362
5-Band AP Low/Med749.70.8004
5-Band AP Medium656.70.9137
5-Band AP Med/High604.60.9924
5-Band AP High571.51.0500
5-Band SF Bay Tour - Low1107.30.5419
5-Band SF Bay Tour - Low/Med904.50.6633
5-Band SF Bay Tour - Medium783.80.7655
5-Band SF Bay Tour - Med/High726.30.8261
5-Band SF Bay Tour - High693.00.8658
Chicago-Mac Upwind0.7638
Chicago-Mac All Purpose0.7973
Chicago-Mac Downwind0.8263
Bayview-Mac Cove Island0.5839
Bayview-Mac Shore0.5881
Harvest Moon Regatta563.51.0647
Double HandedClub Certificate2025
ModocNED 28FF
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassF & F 65 STDMeasurement19/08/2025HINPlan reviewHull constructionLightCarbon rudderNoLight stanchionsNoTrim tabNo
LOA6.499Max. Beam2.510Draft1.240Displacement891Wetted area9.83IMS L6.101LSM05.906Acc. length6.499Sink (kg/mm) 7.91
VCGD0.089VCGM0.145RM Rated (kg·m) 22.5Limit of positive stability(°) N/AStability IndexN/ADefault crew weight170Declared crew weightN/A
PROPELLER
Propeller TypeNo Propeller
Hydro generatorNo
RIG
Forestay tensionFixedInner stayNone FittedMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders1Rotating mastNo
P7.950IG7.175ISP7.480MDT10.067MDL10.090MDT2MDL2TLTaperMWGO
E2.800J2.420BAS0.890FSD0.000SFJ0.000SPL2.840WPLTPS3.170BDMWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date20/08/2025CommentDisplacement is without outboard engine.
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Double HandedClub Certificate2025
ModocNED 28FF
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment10.140.611.081.812.3413.32
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment13.536.98NoNo 12.5420250.050.300.591.171.762.387.16YesNo 8.46
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateComment17.547.547.544.764.8630.03
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment18.076.237.153.333.7888%20.38