Club Certificate2025
BIG BROTHERIRL-1984
Centre de Calcul FFVoile
17 rue Henri Bocquillon
75015 Paris
France
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°41.2°40.0°39.3°39.0°39.2°40.5°42.2°
Beat VMG2.072.823.383.743.984.134.184.164.08
52°3.194.264.995.415.675.855.966.006.00
60°3.374.475.175.565.826.026.166.256.28
75°3.494.605.305.695.976.216.426.656.75
90°3.494.675.475.926.246.456.566.967.27
110°3.524.705.505.966.356.707.057.668.20
120°3.354.545.385.876.256.637.038.139.64
135°2.954.105.015.626.026.406.787.8610.39
150°2.483.554.495.235.726.096.447.248.97
Run VMG2.143.073.904.605.185.625.986.627.76
Gybe Angles148.5°148.5°152.8°158.3°165.5°172.7°177.7°177.7°145.3°
APH ToD:684.2CDL: 5.565APH ToT: 0.8769CertNo:25242c
BOAT
ClassPROTO 1/4 TON 1981DesignerRon HollandBuilderAge date06/1984Series date06/1984Offset fileIRL1984.OFFData fileIRL1984_25242c
HULL
Length Overall6.890 mMaximum Beam2.870 mDraft1.479 mDisplacement1,095 kgDLR8.0525IMS DivisionPerformanceDynamic Allowance0.200%Age Allowance0.487%
PROPELLER
InstallationNo PropellerTypeN/ADiameterN/A
CREW
Maximum weight267 kg(default)Minimum weight137 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail14.5714.86Headsail Luffed11.8211.82Headsail FlyingSymmetric32.1432.14Asymmetric
STORM SAIL AREAS (m²)
Trysail4.31Storm Jib3.50Heavy Weather Jib9.44
SAIL LIMITS
Headsails5Spinnakers4
STABILITY
Righting MomentN/AStability IndexN/A
COMMENTS
2025: P,E,SPL, Sails, DSPL / 2024: First certificate after complete refit / From :Scratch
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.
Club Certificate2025
BIG BROTHERIRL-1984
Centre de Calcul FFVoile
17 rue Henri Bocquillon
75015 Paris
France
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 VMG1740.61276.31065.7963.3903.8871.1861.4865.2882.3
52°1129.4844.7721.5665.9635.4615.4604.3599.9599.8
60°1067.7805.9695.7647.3618.8598.1584.1575.7573.6
75°1032.0783.2679.7632.5602.9579.3560.7541.1533.2
90°1030.8770.3658.0608.0576.5558.3548.5517.5494.9
110°1022.5765.4654.7604.1567.3537.2510.6470.3439.1
120°1073.1793.3669.6613.5575.6542.9512.1443.1373.6
135°1218.3877.3718.3640.7597.5562.8531.3458.0346.3
150°1453.81014.9801.7688.7629.2591.0559.0497.1401.6
Run VMG1680.91171.9923.1783.1695.6640.7602.3543.8463.7
Selected Courses
Windward / Leeward1709.21224.1994.4873.2799.7755.9731.9704.5673.0
All purpose1302.0951.0790.2710.5663.0632.2611.7580.6546.8
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward834.80.7188
All purpose684.20.8769
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low870.60.6892
Triple Number Coastal/Long Distance Medium681.70.8801
Triple Number Coastal/Long Distance High605.20.9914
Triple Number Windward/Leeward Low1109.30.5409
Triple Number Windward/Leeward Medium829.40.7234
Triple Number Windward/Leeward High727.60.8246
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance742.00.8086
Triple Number Coastal/Long Distance Low870.60.6892
Triple Number Coastal/Long Distance Medium681.70.8801
Triple Number Coastal/Long Distance High605.20.9914
Triple Number Windward/Leeward Low1109.30.5409
Triple Number Windward/Leeward Medium829.40.7234
Triple Number Windward/Leeward High727.60.8246
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1802.41218.9936.8793.0706.7656.0617.9548.8510.5
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6170
Downwind "popa"0.7835
70% up, 30% down "Ilhabela"0.6590
30% up, 70% down "Ilhabela-inverso"0.7248
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low870.60.6892
Triple Number Coastal/Long Distance Medium681.70.8801
Triple Number Coastal/Long Distance High605.20.9914
Triple Number Windward/Leeward Low1109.30.5409
Triple Number Windward/Leeward Medium829.40.7234
Triple Number Windward/Leeward High727.60.8246
Predominantly Upwind744.70.8056
Predominantly Downwind687.20.8731
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low870.60.6892
Triple Number AP Medium681.80.8800
Triple Number AP High605.20.9914
Triple Number Windward/Leeward Low1157.30.5185
Triple Number Windward/Leeward Medium829.40.7234
Triple Number Windward/Leeward High727.60.8246
Single Number Predominant Upwind772.70.7765
Single Number Predominant Reaching676.80.8865
Single Number Predominant Downwind714.00.8404
Predominant Upwind - Low1051.20.5708
Predominant Upwind - Low/Med815.70.7355
Predominant Upwind - Medium722.80.8301
Predominant Upwind - Med/High673.10.8914
Predominant Upwind - High652.50.9195
Predominant Downwind Low1035.20.5796
Predominant Downwind Low/Med774.90.7743
Predominant Downwind Medium664.50.9029
Predominant Downwind Med/High592.61.0125
Predominant Downwind High539.61.1119
Predominant Reaching Low930.60.6447
Predominant Reaching Low/Med720.50.8328
Predominant Reaching Medium636.50.9427
Predominant Reaching Med/High583.61.0281
Predominant Reaching High544.31.1023
SA/DSPL Upwind24.84SA/DSPL Downwind43.96
Scoring OptionTODTOT
5-Band Windward/Leeward Low1288.30.4657
5-Band Windward/Leeward Low/Med956.70.6271
5-Band Windward/Leeward Medium815.20.7360
5-Band Windward/Leeward Med/High737.00.8141
5-Band Windward/Leeward High703.80.8525
Windward/Leeward 60-40 Low1298.60.4620
Windward/Leeward 60-40 Low/Med972.70.6168
Windward/Leeward 60-40 Medium835.80.7179
Windward/Leeward 60-40 Med/High763.00.7863
Windward/Leeward 60-40 High736.50.8146
5-Band AP Low956.10.6275
5-Band AP Low/Med767.00.7823
5-Band AP Medium672.10.8928
5-Band AP Med/High614.20.9768
5-Band AP High580.21.0342
5-Band SF Bay Tour - Low1117.70.5368
5-Band SF Bay Tour - Low/Med920.40.6519
5-Band SF Bay Tour - Medium792.60.7570
5-Band SF Bay Tour - Med/High721.50.8316
5-Band SF Bay Tour - High688.00.8721
Chicago-Mac Upwind0.7521
Chicago-Mac All Purpose0.7833
Chicago-Mac Downwind0.8100
Bayview-Mac Cove Island0.5791
Bayview-Mac Shore0.5830
Harvest Moon Regatta590.11.0167
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance742.00.8086
Triple Number Coastal/Long Distance Low870.60.6892
Triple Number Coastal/Long Distance Medium681.70.8801
Triple Number Coastal/Long Distance High605.20.9914
Triple Number Windward/Leeward Low1109.30.5409
Triple Number Windward/Leeward Medium829.40.7234
Triple Number Windward/Leeward High727.60.8246
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1802.41218.9936.8793.0706.7656.0617.9548.8510.5
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance742.00.8086
Triple Number Coastal/Long Distance Low870.60.6892
Triple Number Coastal/Long Distance Medium681.70.8801
Triple Number Coastal/Long Distance High605.20.9914
Triple Number Windward/Leeward Low1109.30.5409
Triple Number Windward/Leeward Medium829.40.7234
Triple Number Windward/Leeward High727.60.8246
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1802.41218.9936.8793.0706.7656.0617.9548.8510.5
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance742.0
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1802.41218.9936.8793.0706.7656.0617.9548.8510.5
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low870.60.6892
Triple Number Coastal/Long Distance Medium681.70.8801
Triple Number Coastal/Long Distance High605.20.9914
Triple Number Windward/Leeward Low1109.30.5409
Triple Number Windward/Leeward Medium829.40.7234
Triple Number Windward/Leeward High727.60.8246
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating742.00.8086
FinRating, kevyt tuuli1264.90.7906
FinRating, kova tuuli578.30.8647
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low870.60.6892
Triple Number Coastal/Long Distance Medium681.70.8801
Triple Number Coastal/Long Distance High605.20.9914
Triple Number Windward/Leeward Low1109.30.5409
Triple Number Windward/Leeward Medium829.40.7234
Triple Number Windward/Leeward High727.60.8246
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8086
Triple Number Coastal/Long Distance Low0.6892
Triple Number Coastal/Long Distance Medium0.8801
Triple Number Coastal/Long Distance High0.9914
Triple Number Windward/Leeward Low0.5409
Triple Number Windward/Leeward Medium0.7234
Triple Number Windward/Leeward High0.8246
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1802.41218.9936.8793.0706.7656.0617.9548.8510.5
For information
General Purpose Handicap (GPH)766.2
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance742.00.8086
Triple Number Coastal/Long Distance Low870.60.6892
Triple Number Coastal/Long Distance Medium681.70.8801
Triple Number Coastal/Long Distance High605.20.9914
Triple Number Windward/Leeward Low1109.30.5409
Triple Number Windward/Leeward Medium829.40.7234
Triple Number Windward/Leeward High727.60.8246
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1802.41218.9936.8793.0706.7656.0617.9548.8510.5
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low870.60.6892
Triple Number Coastal/Long Distance Medium681.70.8801
Triple Number Coastal/Long Distance High605.20.9914
Triple Number Windward/Leeward Low1109.30.5409
Triple Number Windward/Leeward Medium829.40.7234
Triple Number Windward/Leeward High727.60.8246
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance742.00.8086
Triple Number Coastal/Long Distance Low870.60.6892
Triple Number Coastal/Long Distance Medium681.70.8801
Triple Number Coastal/Long Distance High605.20.9914
Triple Number Windward/Leeward Low1109.30.5409
Triple Number Windward/Leeward Medium829.40.7234
Triple Number Windward/Leeward High727.60.8246
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1802.41218.9936.8793.0706.7656.0617.9548.8510.5
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance742.00.8086
Triple Number Coastal/Long Distance Low870.60.6892
Triple Number Coastal/Long Distance Medium681.70.8801
Triple Number Coastal/Long Distance High605.20.9914
Triple Number Windward/Leeward Low1109.30.5409
Triple Number Windward/Leeward Medium829.40.7234
Triple Number Windward/Leeward High727.60.8246
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1802.41218.9936.8793.0706.7656.0617.9548.8510.5
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low870.6
Triple Number Coastal/Long Distance Medium681.7
Triple Number Coastal/Long Distance High605.2
Triple Number Windward/Leeward Low1109.3
Triple Number Windward/Leeward Medium829.4
Triple Number Windward/Leeward High727.6
Predominantly Upwind744.7
Predominantly Downwind687.2
Predominantly Reaching662.7
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance742.00.8086
Triple Number Coastal/Long Distance Low870.60.6892
Triple Number Coastal/Long Distance Medium681.70.8801
Triple Number Coastal/Long Distance High605.20.9914
Triple Number Windward/Leeward Low1109.30.5409
Triple Number Windward/Leeward Medium829.40.7234
Triple Number Windward/Leeward High727.60.8246
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1802.41218.9936.8793.0706.7656.0617.9548.8510.5
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6892
Triple Number Coastal/Long Distance Medium0.8801
Triple Number Coastal/Long Distance High0.9914
Triple Number Windward/Leeward Low0.5409
Triple Number Windward/Leeward Medium0.7234
Triple Number Windward/Leeward High0.8246
Coastal/Long Distance0.8086
Predominantly Upwind0.8056
Predominantly Downwind0.8731
For information
General Purpose Handicap (GPH)766.2
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.8769
Distanseseilas Trippeltall svak vind0.6892
Distanseseilas Trippeltall mellomvind0.8801
Distanseseilas Trippeltall sterk vind0.9914
Pølsebane Trippeltall svak vind0.5409
Pølsebane Trippeltall mellomvind0.7234
Pølsebane Trippeltall sterk vind0.8246
Motvind Singeltall0.8056
Medvind Singeltall0.8731
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low870.60.6892
Triple Number Coastal/Long Distance Medium681.70.8801
Triple Number Coastal/Long Distance High605.20.9914
Triple Number Windward/Leeward Low1109.30.5409
Triple Number Windward/Leeward Medium829.40.7234
Triple Number Windward/Leeward High727.60.8246
Coastal/Long Distance742.00.8086
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind744.70.8056
Predominantly Downwind687.20.8731
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore682.50.8792
Cape Doctor Coastal557.01.0772
Triple Number Coastal/Long Distance Low870.60.6892
Triple Number Coastal/Long Distance Medium681.70.8801
Triple Number Coastal/Long Distance High605.20.9914
Triple Number Windward/Leeward Low1109.30.5409
Triple Number Windward/Leeward Medium829.40.7234
Triple Number Windward/Leeward High727.60.8246
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6892
Triple Number Coastal/Long Distance Medium0.8801
Triple Number Coastal/Long Distance High0.9914
Triple Number Windward/Leeward Low0.5409
Triple Number Windward/Leeward Medium0.7234
Triple Number Windward/Leeward High0.8246
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6892
Triple Number Coastal/Long Distance Medium0.8801
Triple Number Coastal/Long Distance High0.9914
Triple Number Windward/Leeward Low0.5409
Triple Number Windward/Leeward Medium0.7234
Triple Number Windward/Leeward High0.8246
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance742.00.8086
Triple Number Coastal/Long Distance Low870.60.6892
Triple Number Coastal/Long Distance Medium681.70.8801
Triple Number Coastal/Long Distance High605.20.9914
Triple Number Windward/Leeward Low1109.30.5409
Triple Number Windward/Leeward Medium829.40.7234
Triple Number Windward/Leeward High727.60.8246
Predominantly Upwind744.70.8056
Predominantly Downwind687.20.8731
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1802.41218.9936.8793.0706.7656.0617.9548.8510.5
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance742.00.8086
Triple Number Coastal/Long Distance Low870.60.6892
Triple Number Coastal/Long Distance Medium681.70.8801
Triple Number Coastal/Long Distance High605.20.9914
Triple Number Windward/Leeward Low1109.30.5409
Triple Number Windward/Leeward Medium829.40.7234
Triple Number Windward/Leeward High727.60.8246
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1802.41218.9936.8793.0706.7656.0617.9548.8510.5
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low870.60.6892
Triple Number AP Medium681.80.8800
Triple Number AP High605.20.9914
Triple Number Windward/Leeward Low1157.30.5185
Triple Number Windward/Leeward Medium829.40.7234
Triple Number Windward/Leeward High727.60.8246
Single Number Predominant Upwind772.70.7765
Single Number Predominant Reaching676.80.8865
Single Number Predominant Downwind714.00.8404
Predominant Upwind - Low1051.20.5708
Predominant Upwind - Low/Med815.70.7355
Predominant Upwind - Medium722.80.8301
Predominant Upwind - Med/High673.10.8914
Predominant Upwind - High652.50.9195
Predominant Downwind Low1035.20.5796
Predominant Downwind Low/Med774.90.7743
Predominant Downwind Medium664.50.9029
Predominant Downwind Med/High592.61.0125
Predominant Downwind High539.61.1119
Predominant Reaching Low930.60.6447
Predominant Reaching Low/Med720.50.8328
Predominant Reaching Medium636.50.9427
Predominant Reaching Med/High583.61.0281
Predominant Reaching High544.31.1023
SA/DSPL Upwind24.84SA/DSPL Downwind43.96
Scoring OptionTODTOT
5-Band Windward/Leeward Low1288.30.4657
5-Band Windward/Leeward Low/Med956.70.6271
5-Band Windward/Leeward Medium815.20.7360
5-Band Windward/Leeward Med/High737.00.8141
5-Band Windward/Leeward High703.80.8525
Windward/Leeward 60-40 Low1298.60.4620
Windward/Leeward 60-40 Low/Med972.70.6168
Windward/Leeward 60-40 Medium835.80.7179
Windward/Leeward 60-40 Med/High763.00.7863
Windward/Leeward 60-40 High736.50.8146
5-Band AP Low956.10.6275
5-Band AP Low/Med767.00.7823
5-Band AP Medium672.10.8928
5-Band AP Med/High614.20.9768
5-Band AP High580.21.0342
5-Band SF Bay Tour - Low1117.70.5368
5-Band SF Bay Tour - Low/Med920.40.6519
5-Band SF Bay Tour - Medium792.60.7570
5-Band SF Bay Tour - Med/High721.50.8316
5-Band SF Bay Tour - High688.00.8721
Chicago-Mac Upwind0.7521
Chicago-Mac All Purpose0.7833
Chicago-Mac Downwind0.8100
Bayview-Mac Cove Island0.5791
Bayview-Mac Shore0.5830
Harvest Moon Regatta590.11.0167
Club Certificate2025
BIG BROTHERIRL-1984
Centre de Calcul FFVoile
17 rue Henri Bocquillon
75015 Paris
France
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassPROTO 1/4 TON 1981MeasurementHIN1498Plan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA6.890Max. Beam2.870Draft1.479Displacement1,095Wetted area10.35IMS L5.671LSM05.142Acc. length6.890Sink (kg/mm) 7.93
VCGD0.017VCGM0.131RM Rated (kg·m) 29.3Limit of positive stability(°) N/AStability IndexN/ADefault crew weight267Declared crew weightN/A
PROPELLER
Propeller TypeNo Propeller
Hydro generatorNo
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstaysCheckstaysSpreaders1Rotating mastNo
P8.200IG8.360ISP8.670MDT10.080MDL10.120MDT20.058MDL20.072TL3.013MW0.090GO0.090
E3.000J2.500BAS1.050FSDSFJ0.130SPL2.600WPLTPSBD0.100MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered0.017Flotation Date01/01/2013
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
BIG BROTHERIRL-1984
Centre de Calcul FFVoile
17 rue Henri Bocquillon
75015 Paris
France
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentM20.180.601.081.902.5514.5704/06/2025Medium - Modified from M1
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentG20.150.450.791.462.122.698.24YesNo 11.8204/06/2025Light - New 2025G30.120.430.761.401.932.448.24YesNo 10.9504/06/2025Heavy - New 2025
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateCommentS28.248.248.244.734.4832.1404/06/2025Race - New 2025S38.048.048.044.564.9331.0504/06/2025Heavy - New 2025