Double HandedClub Certificate2025
FireflyNED 4926
Watersportverbond
www.watersportverbond.nl
Wedstrijdsport@watersportverbond.nl
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 Angles43.8°43.8°41.9°40.7°39.7°39.9°40.5°43.4°46.0°
Beat VMG1.902.653.253.673.933.983.973.913.74
52°2.994.064.855.375.685.785.815.845.76
60°3.204.305.075.565.866.006.066.126.09
75°3.324.455.235.716.036.306.476.616.65
90°3.484.705.556.006.216.386.687.107.29
110°3.524.755.616.136.596.967.227.668.10
120°3.354.585.486.046.537.027.558.379.28
135°2.874.045.015.766.246.737.288.9811.85
150°2.393.474.455.265.876.316.767.9110.87
Run VMG2.073.003.864.595.265.746.146.999.42
Gybe Angles148.7°148.7°152.3°155.5°163.3°170.0°170.9°165.8°143.2°
APH ToD:684.8CDL: 5.696APH ToT: 0.8761CertNo:4745
BOAT
ClassF & F 65 STDDesignerJac de RidderBuilderF&F BoatsAge date04/1992Series date04/1992Offset fileh191.bofData fileNED4926
HULL
Length Overall6.499 mMaximum Beam2.510 mDraft1.246 mDisplacement927 kgDLR4.5097IMS 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)
MeasuredRatedMainsail13.4613.74Headsail Luffed8.868.86Headsail FlyingSymmetric31.4431.44Asymmetric
STORM SAIL AREAS (m²)
Trysail3.94Storm Jib2.58Heavy Weather Jib6.95
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.
ORC Ref  04310003WTMIssued on 20/08/2025Valid until 31/03/2026
VPP ver: 2025 1.01 | © ORC | www.orc.org
Double HandedClub Certificate2025
FireflyNED 4926
Watersportverbond
www.watersportverbond.nl
Wedstrijdsport@watersportverbond.nl
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 VMG1894.91360.61109.1981.2917.1905.2907.3921.7962.2
52°1203.7886.3742.3670.0634.0622.9619.2616.4624.5
60°1125.7837.7710.2647.9614.7599.9594.4588.1591.4
75°1085.0809.2688.1630.7597.0571.1556.4544.4541.1
90°1034.9766.3648.7600.4579.5564.2538.5507.3493.9
110°1023.1758.1641.5587.2546.2517.0498.9469.9444.6
120°1075.6786.6656.6596.4551.5512.7476.7430.0387.8
135°1252.9892.1718.4625.3577.0535.0494.7400.8303.8
150°1503.31037.7809.4684.0613.8570.8532.5455.2331.1
Run VMG1742.81198.2932.5784.3683.9627.1585.9514.9382.3
Selected Courses
Windward / Leeward1817.41279.41020.8882.7800.5766.2746.6718.3672.2
All purpose1365.4981.6801.5709.8657.7630.7611.4581.2549.6
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward846.60.7087
All purpose684.80.8761
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low891.50.6730
Triple Number Coastal/Long Distance Medium680.30.8820
Triple Number Coastal/Long Distance High604.90.9919
Triple Number Windward/Leeward Low1150.10.5217
Triple Number Windward/Leeward Medium837.60.7163
Triple Number Windward/Leeward High740.80.8099
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance744.60.8058
Triple Number Coastal/Long Distance Low891.50.6730
Triple Number Coastal/Long Distance Medium680.30.8820
Triple Number Coastal/Long Distance High604.90.9919
Triple Number Windward/Leeward Low1150.10.5217
Triple Number Windward/Leeward Medium837.60.7163
Triple Number Windward/Leeward High740.80.8099
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1918.71271.3957.9796.9702.7655.5614.9545.2511.1
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.5914
Downwind "popa"0.7885
70% up, 30% down "Ilhabela"0.6393
30% up, 70% down "Ilhabela-inverso"0.7168
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low891.50.6730
Triple Number Coastal/Long Distance Medium680.30.8820
Triple Number Coastal/Long Distance High604.90.9919
Triple Number Windward/Leeward Low1150.10.5217
Triple Number Windward/Leeward Medium837.60.7163
Triple Number Windward/Leeward High740.80.8099
Predominantly Upwind754.90.7948
Predominantly Downwind681.70.8801
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low891.50.6730
Triple Number AP Medium680.40.8819
Triple Number AP High604.90.9919
Triple Number Windward/Leeward Low1203.20.4987
Triple Number Windward/Leeward Medium837.60.7163
Triple Number Windward/Leeward High740.80.8099
Single Number Predominant Upwind788.20.7612
Single Number Predominant Reaching676.30.8872
Single Number Predominant Downwind710.70.8443
Predominant Upwind - Low1099.40.5457
Predominant Upwind - Low/Med831.10.7219
Predominant Upwind - Medium728.60.8235
Predominant Upwind - Med/High684.70.8763
Predominant Upwind - High667.50.8988
Predominant Downwind Low1062.30.5648
Predominant Downwind Low/Med778.20.7710
Predominant Downwind Medium657.10.9130
Predominant Downwind Med/High578.21.0377
Predominant Downwind High516.11.1625
Predominant Reaching Low951.70.6304
Predominant Reaching Low/Med722.40.8306
Predominant Reaching Medium632.50.9486
Predominant Reaching Med/High575.21.0431
Predominant Reaching High531.81.1283
SA/DSPL Upwind23.48SA/DSPL Downwind47.24
Scoring OptionTODTOT
5-Band Windward/Leeward Low1349.60.4446
5-Band Windward/Leeward Low/Med977.70.6137
5-Band Windward/Leeward Medium822.50.7295
5-Band Windward/Leeward Med/High749.60.8004
5-Band Windward/Leeward High715.20.8389
Windward/Leeward 60-40 Low1366.00.4392
Windward/Leeward 60-40 Low/Med996.70.6020
Windward/Leeward 60-40 Medium846.20.7090
Windward/Leeward 60-40 Med/High781.70.7676
Windward/Leeward 60-40 High757.40.7922
5-Band AP Low981.80.6111
5-Band AP Low/Med774.40.7748
5-Band AP Medium670.00.8955
5-Band AP Med/High613.40.9781
5-Band AP High581.01.0327
5-Band SF Bay Tour - Low1164.10.5154
5-Band SF Bay Tour - Low/Med939.20.6389
5-Band SF Bay Tour - Medium798.00.7518
5-Band SF Bay Tour - Med/High731.60.8201
5-Band SF Bay Tour - High698.80.8586
Chicago-Mac Upwind0.7376
Chicago-Mac All Purpose0.7761
Chicago-Mac Downwind0.8111
Bayview-Mac Cove Island0.5601
Bayview-Mac Shore0.5640
Harvest Moon Regatta578.41.0374
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance744.60.8058
Triple Number Coastal/Long Distance Low891.50.6730
Triple Number Coastal/Long Distance Medium680.30.8820
Triple Number Coastal/Long Distance High604.90.9919
Triple Number Windward/Leeward Low1150.10.5217
Triple Number Windward/Leeward Medium837.60.7163
Triple Number Windward/Leeward High740.80.8099
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1918.71271.3957.9796.9702.7655.5614.9545.2511.1
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance744.60.8058
Triple Number Coastal/Long Distance Low891.50.6730
Triple Number Coastal/Long Distance Medium680.30.8820
Triple Number Coastal/Long Distance High604.90.9919
Triple Number Windward/Leeward Low1150.10.5217
Triple Number Windward/Leeward Medium837.60.7163
Triple Number Windward/Leeward High740.80.8099
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1918.71271.3957.9796.9702.7655.5614.9545.2511.1
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance744.6
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1918.71271.3957.9796.9702.7655.5614.9545.2511.1
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low891.50.6730
Triple Number Coastal/Long Distance Medium680.30.8820
Triple Number Coastal/Long Distance High604.90.9919
Triple Number Windward/Leeward Low1150.10.5217
Triple Number Windward/Leeward Medium837.60.7163
Triple Number Windward/Leeward High740.80.8099
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating744.60.8059
FinRating, kevyt tuuli1322.20.7563
FinRating, kova tuuli579.00.8635
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low891.50.6730
Triple Number Coastal/Long Distance Medium680.30.8820
Triple Number Coastal/Long Distance High604.90.9919
Triple Number Windward/Leeward Low1150.10.5217
Triple Number Windward/Leeward Medium837.60.7163
Triple Number Windward/Leeward High740.80.8099
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8058
Triple Number Coastal/Long Distance Low0.6730
Triple Number Coastal/Long Distance Medium0.8820
Triple Number Coastal/Long Distance High0.9919
Triple Number Windward/Leeward Low0.5217
Triple Number Windward/Leeward Medium0.7163
Triple Number Windward/Leeward High0.8099
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1918.71271.3957.9796.9702.7655.5614.9545.2511.1
For information
General Purpose Handicap (GPH)771.2
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance744.60.8058
Triple Number Coastal/Long Distance Low891.50.6730
Triple Number Coastal/Long Distance Medium680.30.8820
Triple Number Coastal/Long Distance High604.90.9919
Triple Number Windward/Leeward Low1150.10.5217
Triple Number Windward/Leeward Medium837.60.7163
Triple Number Windward/Leeward High740.80.8099
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1918.71271.3957.9796.9702.7655.5614.9545.2511.1
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low891.50.6730
Triple Number Coastal/Long Distance Medium680.30.8820
Triple Number Coastal/Long Distance High604.90.9919
Triple Number Windward/Leeward Low1150.10.5217
Triple Number Windward/Leeward Medium837.60.7163
Triple Number Windward/Leeward High740.80.8099
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance744.60.8058
Triple Number Coastal/Long Distance Low891.50.6730
Triple Number Coastal/Long Distance Medium680.30.8820
Triple Number Coastal/Long Distance High604.90.9919
Triple Number Windward/Leeward Low1150.10.5217
Triple Number Windward/Leeward Medium837.60.7163
Triple Number Windward/Leeward High740.80.8099
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1918.71271.3957.9796.9702.7655.5614.9545.2511.1
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance744.60.8058
Triple Number Coastal/Long Distance Low891.50.6730
Triple Number Coastal/Long Distance Medium680.30.8820
Triple Number Coastal/Long Distance High604.90.9919
Triple Number Windward/Leeward Low1150.10.5217
Triple Number Windward/Leeward Medium837.60.7163
Triple Number Windward/Leeward High740.80.8099
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1918.71271.3957.9796.9702.7655.5614.9545.2511.1
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low891.5
Triple Number Coastal/Long Distance Medium680.3
Triple Number Coastal/Long Distance High604.9
Triple Number Windward/Leeward Low1150.1
Triple Number Windward/Leeward Medium837.6
Triple Number Windward/Leeward High740.8
Predominantly Upwind754.9
Predominantly Downwind681.7
Predominantly Reaching658.2
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance744.60.8058
Triple Number Coastal/Long Distance Low891.50.6730
Triple Number Coastal/Long Distance Medium680.30.8820
Triple Number Coastal/Long Distance High604.90.9919
Triple Number Windward/Leeward Low1150.10.5217
Triple Number Windward/Leeward Medium837.60.7163
Triple Number Windward/Leeward High740.80.8099
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1918.71271.3957.9796.9702.7655.5614.9545.2511.1
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6730
Triple Number Coastal/Long Distance Medium0.8820
Triple Number Coastal/Long Distance High0.9919
Triple Number Windward/Leeward Low0.5217
Triple Number Windward/Leeward Medium0.7163
Triple Number Windward/Leeward High0.8099
Coastal/Long Distance0.8058
Predominantly Upwind0.7948
Predominantly Downwind0.8801
For information
General Purpose Handicap (GPH)771.2
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.8761
Distanseseilas Trippeltall svak vind0.6730
Distanseseilas Trippeltall mellomvind0.8820
Distanseseilas Trippeltall sterk vind0.9919
Pølsebane Trippeltall svak vind0.5217
Pølsebane Trippeltall mellomvind0.7163
Pølsebane Trippeltall sterk vind0.8099
Motvind Singeltall0.7948
Medvind Singeltall0.8801
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low891.50.6730
Triple Number Coastal/Long Distance Medium680.30.8820
Triple Number Coastal/Long Distance High604.90.9919
Triple Number Windward/Leeward Low1150.10.5217
Triple Number Windward/Leeward Medium837.60.7163
Triple Number Windward/Leeward High740.80.8099
Coastal/Long Distance744.60.8058
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind754.90.7948
Predominantly Downwind681.70.8801
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore686.10.8746
Cape Doctor Coastal559.11.0731
Triple Number Coastal/Long Distance Low891.50.6730
Triple Number Coastal/Long Distance Medium680.30.8820
Triple Number Coastal/Long Distance High604.90.9919
Triple Number Windward/Leeward Low1150.10.5217
Triple Number Windward/Leeward Medium837.60.7163
Triple Number Windward/Leeward High740.80.8099
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6730
Triple Number Coastal/Long Distance Medium0.8820
Triple Number Coastal/Long Distance High0.9919
Triple Number Windward/Leeward Low0.5217
Triple Number Windward/Leeward Medium0.7163
Triple Number Windward/Leeward High0.8099
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6730
Triple Number Coastal/Long Distance Medium0.8820
Triple Number Coastal/Long Distance High0.9919
Triple Number Windward/Leeward Low0.5217
Triple Number Windward/Leeward Medium0.7163
Triple Number Windward/Leeward High0.8099
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance744.60.8058
Triple Number Coastal/Long Distance Low891.50.6730
Triple Number Coastal/Long Distance Medium680.30.8820
Triple Number Coastal/Long Distance High604.90.9919
Triple Number Windward/Leeward Low1150.10.5217
Triple Number Windward/Leeward Medium837.60.7163
Triple Number Windward/Leeward High740.80.8099
Predominantly Upwind754.90.7948
Predominantly Downwind681.70.8801
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1918.71271.3957.9796.9702.7655.5614.9545.2511.1
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance744.60.8058
Triple Number Coastal/Long Distance Low891.50.6730
Triple Number Coastal/Long Distance Medium680.30.8820
Triple Number Coastal/Long Distance High604.90.9919
Triple Number Windward/Leeward Low1150.10.5217
Triple Number Windward/Leeward Medium837.60.7163
Triple Number Windward/Leeward High740.80.8099
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1918.71271.3957.9796.9702.7655.5614.9545.2511.1
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low891.50.6730
Triple Number AP Medium680.40.8819
Triple Number AP High604.90.9919
Triple Number Windward/Leeward Low1203.20.4987
Triple Number Windward/Leeward Medium837.60.7163
Triple Number Windward/Leeward High740.80.8099
Single Number Predominant Upwind788.20.7612
Single Number Predominant Reaching676.30.8872
Single Number Predominant Downwind710.70.8443
Predominant Upwind - Low1099.40.5457
Predominant Upwind - Low/Med831.10.7219
Predominant Upwind - Medium728.60.8235
Predominant Upwind - Med/High684.70.8763
Predominant Upwind - High667.50.8988
Predominant Downwind Low1062.30.5648
Predominant Downwind Low/Med778.20.7710
Predominant Downwind Medium657.10.9130
Predominant Downwind Med/High578.21.0377
Predominant Downwind High516.11.1625
Predominant Reaching Low951.70.6304
Predominant Reaching Low/Med722.40.8306
Predominant Reaching Medium632.50.9486
Predominant Reaching Med/High575.21.0431
Predominant Reaching High531.81.1283
SA/DSPL Upwind23.48SA/DSPL Downwind47.24
Scoring OptionTODTOT
5-Band Windward/Leeward Low1349.60.4446
5-Band Windward/Leeward Low/Med977.70.6137
5-Band Windward/Leeward Medium822.50.7295
5-Band Windward/Leeward Med/High749.60.8004
5-Band Windward/Leeward High715.20.8389
Windward/Leeward 60-40 Low1366.00.4392
Windward/Leeward 60-40 Low/Med996.70.6020
Windward/Leeward 60-40 Medium846.20.7090
Windward/Leeward 60-40 Med/High781.70.7676
Windward/Leeward 60-40 High757.40.7922
5-Band AP Low981.80.6111
5-Band AP Low/Med774.40.7748
5-Band AP Medium670.00.8955
5-Band AP Med/High613.40.9781
5-Band AP High581.01.0327
5-Band SF Bay Tour - Low1164.10.5154
5-Band SF Bay Tour - Low/Med939.20.6389
5-Band SF Bay Tour - Medium798.00.7518
5-Band SF Bay Tour - Med/High731.60.8201
5-Band SF Bay Tour - High698.80.8586
Chicago-Mac Upwind0.7376
Chicago-Mac All Purpose0.7761
Chicago-Mac Downwind0.8111
Bayview-Mac Cove Island0.5601
Bayview-Mac Shore0.5640
Harvest Moon Regatta578.41.0374
ORC Ref  04310003WTMIssued on 20/08/2025Valid until 31/03/2026
VPP ver: 2025 1.01 | © ORC | www.orc.org
Double HandedClub Certificate2025
FireflyNED 4926
Watersportverbond
www.watersportverbond.nl
Wedstrijdsport@watersportverbond.nl
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassF & F 65 STDMeasurement11/08/1992HINPlan reviewHull constructionLightCarbon rudderNoLight stanchionsNoTrim tabNo
LOA6.499Max. Beam2.510Draft1.246Displacement927Wetted area9.89IMS L6.089LSM05.901Acc. length6.499Sink (kg/mm) 7.95
VCGD0.073VCGM0.123RM Rated (kg·m) 23.1Limit 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
P7.950IG7.175ISP7.480MDT10.072MDL10.094MDT20.055MDL20.062TL1.600MW0.094GO0.094
E2.830J2.380BAS0.890FSD0.000SFJ0.000SPL2.760WPLTPSBD0.085MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered0.073Flotation Date20/08/2025
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  04310003WTMIssued on 20/08/2025Valid until 31/03/2026
VPP ver: 2025 1.01 | © ORC | www.orc.org
Double HandedClub Certificate2025
FireflyNED 4926
Watersportverbond
www.watersportverbond.nl
Wedstrijdsport@watersportverbond.nl
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment10.120.611.081.822.3913.46* Copied from legacy *
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment12.407.25NoNo 8.86* Copied from legacy *
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateCommentORC7.597.597.594.974.9731.44* Copied from legacy *
ORC Ref  04310003WTMIssued on 20/08/2025Valid until 31/03/2026
VPP ver: 2025 1.01 | © ORC | www.orc.org