Double HandedClub Certificate2025
Bona DiaRSA-97
ORC
Central Rating Office
Issuing certificates for
SOUTH AFRICA
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 Angles43.9°43.9°41.9°40.9°40.8°41.1°40.8°41.0°42.5°
Beat VMG1.922.683.283.703.984.144.214.214.06
52°3.024.104.905.475.856.076.156.166.07
60°3.214.325.115.686.056.266.376.416.38
75°3.314.455.275.866.236.466.616.756.78
90°3.224.355.205.836.246.516.706.987.14
110°2.813.944.905.646.186.526.777.187.48
120°2.643.754.725.486.066.446.727.187.59
135°2.293.344.295.065.716.196.527.027.48
150°1.952.893.794.575.235.796.226.787.24
Run VMG1.682.503.294.014.665.245.756.476.94
Gybe Angles149.8°149.8°153.9°161.3°169.4°173.0°176.3°179.0°179.2°
APH ToD:710.3CDL: 6.641APH ToT: 0.8447CertNo:ZAD288
BOAT
ClassMiuraDesignerBerckemeyerBuilderNebeAge date12/1994Series date01/1970Offset fileSA92033.OFFData fileRSA-97
HULL
Length Overall9.330 mMaximum Beam3.148 mDraft1.766 mDisplacement4,700 kgDLR9.7333IMS DivisionCruiser/RacerDynamic Allowance0.650%Age Allowance0.487%
PROPELLER
InstallationShaft exposedTypeSolid 3 bladesDiameter0.330m
CREW
Maximum weight170 kg(default)Minimum weight120 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail18.1918.45Headsail Luffed28.7428.74Headsail FlyingSymmetricAsymmetric
STORM SAIL AREAS (m²)
Trysail5.42Storm Jib6.77Heavy Weather Jib18.28
SAIL LIMITS
Headsails5
✱ One set on the forestay
Spinnakers0
✱ Spinnaker pole aboard
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
Bona DiaRSA-97
ORC
Central Rating Office
Issuing certificates for
SOUTH AFRICA
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 VMG1870.31343.41096.2972.2903.6868.8854.5854.3886.1
52°1191.3878.2734.9658.5615.5593.6585.1584.2592.8
60°1120.9833.8704.1633.5594.9574.8565.0561.8564.1
75°1086.7808.6682.9614.1577.5557.2544.5533.0531.0
90°1119.6826.8692.2617.4576.6553.0537.0515.8504.3
110°1281.4912.7735.4638.1582.9552.2531.6501.3481.6
120°1363.3958.7763.2657.1594.0558.6535.7501.2474.3
135°1568.91077.7838.8710.8630.6581.5552.0512.6481.0
150°1850.21247.0950.7788.4688.7621.3578.5531.2497.3
Run VMG2140.41439.91093.7897.4772.5687.0625.7556.5519.0
Selected Courses
Windward / Leeward2002.21391.61095.0934.8838.1777.9740.1705.4702.5
All purpose1510.51070.1858.5744.6677.9638.3614.8591.3584.3
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward882.30.6800
All purpose710.30.8447
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low964.30.6222
Triple Number Coastal/Long Distance Medium705.30.8507
Triple Number Coastal/Long Distance High611.90.9806
Triple Number Windward/Leeward Low1243.30.4826
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High736.60.8146
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance776.20.7730
Triple Number Coastal/Long Distance Low964.30.6222
Triple Number Coastal/Long Distance Medium705.30.8507
Triple Number Coastal/Long Distance High611.90.9806
Triple Number Windward/Leeward Low1243.30.4826
Triple Number Windward/Leeward Medium876.70.6844
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 Distance2151.71396.51031.5841.2726.3663.7620.9563.1550.7
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6093
Downwind "popa"0.6916
70% up, 30% down "Ilhabela"0.6319
30% up, 70% down "Ilhabela-inverso"0.6647
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low964.30.6222
Triple Number Coastal/Long Distance Medium705.30.8507
Triple Number Coastal/Long Distance High611.90.9806
Triple Number Windward/Leeward Low1243.30.4826
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High736.60.8146
Predominantly Upwind760.60.7888
Predominantly Downwind737.70.8133
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low964.30.6222
Triple Number AP Medium705.40.8506
Triple Number AP High611.90.9806
Triple Number Windward/Leeward Low1303.50.4603
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High736.60.8146
Single Number Predominant Upwind794.80.7550
Single Number Predominant Reaching712.40.8422
Single Number Predominant Downwind778.40.7708
Predominant Upwind - Low1143.00.5249
Predominant Upwind - Low/Med851.60.7046
Predominant Upwind - Medium730.20.8217
Predominant Upwind - Med/High668.90.8970
Predominant Upwind - High653.50.9182
Predominant Downwind Low1221.30.4913
Predominant Downwind Low/Med863.70.6947
Predominant Downwind Medium704.20.8520
Predominant Downwind Med/High607.70.9873
Predominant Downwind High565.41.0611
Predominant Reaching Low1049.70.5716
Predominant Reaching Low/Med772.70.7765
Predominant Reaching Medium653.50.9181
Predominant Reaching Med/High586.81.0226
Predominant Reaching High559.71.0719
SA/DSPL Upwind16.64SA/DSPL Downwind16.64
Scoring OptionTODTOT
5-Band Windward/Leeward Low1470.90.4079
5-Band Windward/Leeward Low/Med1044.30.5746
5-Band Windward/Leeward Medium857.30.6998
5-Band Windward/Leeward Med/High748.90.8012
5-Band Windward/Leeward High710.90.8440
Windward/Leeward 60-40 Low1459.40.4111
Windward/Leeward 60-40 Low/Med1047.50.5728
Windward/Leeward 60-40 Medium870.10.6896
Windward/Leeward 60-40 Med/High771.30.7779
Windward/Leeward 60-40 High740.70.8100
5-Band AP Low1088.60.5512
5-Band AP Low/Med822.80.7292
5-Band AP Medium692.10.8669
5-Band AP Med/High620.10.9676
5-Band AP High594.21.0098
5-Band SF Bay Tour - Low1255.90.4778
5-Band SF Bay Tour - Low/Med997.50.6015
5-Band SF Bay Tour - Medium827.20.7253
5-Band SF Bay Tour - Med/High732.20.8194
5-Band SF Bay Tour - High700.90.8560
Chicago-Mac Upwind0.7273
Chicago-Mac All Purpose0.7363
Chicago-Mac Downwind0.7370
Bayview-Mac Cove Island0.5179
Bayview-Mac Shore0.5233
Harvest Moon Regatta606.30.9896
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance776.20.7730
Triple Number Coastal/Long Distance Low964.30.6222
Triple Number Coastal/Long Distance Medium705.30.8507
Triple Number Coastal/Long Distance High611.90.9806
Triple Number Windward/Leeward Low1243.30.4826
Triple Number Windward/Leeward Medium876.70.6844
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 Distance2151.71396.51031.5841.2726.3663.7620.9563.1550.7
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance776.20.7730
Triple Number Coastal/Long Distance Low964.30.6222
Triple Number Coastal/Long Distance Medium705.30.8507
Triple Number Coastal/Long Distance High611.90.9806
Triple Number Windward/Leeward Low1243.30.4826
Triple Number Windward/Leeward Medium876.70.6844
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 Distance2151.71396.51031.5841.2726.3663.7620.9563.1550.7
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance776.2
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2151.71396.51031.5841.2726.3663.7620.9563.1550.7
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low964.30.6222
Triple Number Coastal/Long Distance Medium705.30.8507
Triple Number Coastal/Long Distance High611.90.9806
Triple Number Windward/Leeward Low1243.30.4826
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High736.60.8146
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating776.20.7730
FinRating, kevyt tuuli1451.80.6888
FinRating, kova tuuli598.90.8348
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low964.30.6222
Triple Number Coastal/Long Distance Medium705.30.8507
Triple Number Coastal/Long Distance High611.90.9806
Triple Number Windward/Leeward Low1243.30.4826
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High736.60.8146
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.7730
Triple Number Coastal/Long Distance Low0.6222
Triple Number Coastal/Long Distance Medium0.8507
Triple Number Coastal/Long Distance High0.9806
Triple Number Windward/Leeward Low0.4826
Triple Number Windward/Leeward Medium0.6844
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 Distance2151.71396.51031.5841.2726.3663.7620.9563.1550.7
For information
General Purpose Handicap (GPH)807.6
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance776.20.7730
Triple Number Coastal/Long Distance Low964.30.6222
Triple Number Coastal/Long Distance Medium705.30.8507
Triple Number Coastal/Long Distance High611.90.9806
Triple Number Windward/Leeward Low1243.30.4826
Triple Number Windward/Leeward Medium876.70.6844
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 Distance2151.71396.51031.5841.2726.3663.7620.9563.1550.7
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low964.30.6222
Triple Number Coastal/Long Distance Medium705.30.8507
Triple Number Coastal/Long Distance High611.90.9806
Triple Number Windward/Leeward Low1243.30.4826
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High736.60.8146
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance776.20.7730
Triple Number Coastal/Long Distance Low964.30.6222
Triple Number Coastal/Long Distance Medium705.30.8507
Triple Number Coastal/Long Distance High611.90.9806
Triple Number Windward/Leeward Low1243.30.4826
Triple Number Windward/Leeward Medium876.70.6844
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 Distance2151.71396.51031.5841.2726.3663.7620.9563.1550.7
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance776.20.7730
Triple Number Coastal/Long Distance Low964.30.6222
Triple Number Coastal/Long Distance Medium705.30.8507
Triple Number Coastal/Long Distance High611.90.9806
Triple Number Windward/Leeward Low1243.30.4826
Triple Number Windward/Leeward Medium876.70.6844
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 Distance2151.71396.51031.5841.2726.3663.7620.9563.1550.7
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low964.3
Triple Number Coastal/Long Distance Medium705.3
Triple Number Coastal/Long Distance High611.9
Triple Number Windward/Leeward Low1243.3
Triple Number Windward/Leeward Medium876.7
Triple Number Windward/Leeward High736.6
Predominantly Upwind760.6
Predominantly Downwind737.7
Predominantly Reaching698.1
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance776.20.7730
Triple Number Coastal/Long Distance Low964.30.6222
Triple Number Coastal/Long Distance Medium705.30.8507
Triple Number Coastal/Long Distance High611.90.9806
Triple Number Windward/Leeward Low1243.30.4826
Triple Number Windward/Leeward Medium876.70.6844
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 Distance2151.71396.51031.5841.2726.3663.7620.9563.1550.7
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6222
Triple Number Coastal/Long Distance Medium0.8507
Triple Number Coastal/Long Distance High0.9806
Triple Number Windward/Leeward Low0.4826
Triple Number Windward/Leeward Medium0.6844
Triple Number Windward/Leeward High0.8146
Coastal/Long Distance0.7730
Predominantly Upwind0.7888
Predominantly Downwind0.8133
For information
General Purpose Handicap (GPH)807.6
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.8447
Distanseseilas Trippeltall svak vind0.6222
Distanseseilas Trippeltall mellomvind0.8507
Distanseseilas Trippeltall sterk vind0.9806
Pølsebane Trippeltall svak vind0.4826
Pølsebane Trippeltall mellomvind0.6844
Pølsebane Trippeltall sterk vind0.8146
Motvind Singeltall0.7888
Medvind Singeltall0.8133
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low964.30.6222
Triple Number Coastal/Long Distance Medium705.30.8507
Triple Number Coastal/Long Distance High611.90.9806
Triple Number Windward/Leeward Low1243.30.4826
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High736.60.8146
Coastal/Long Distance776.20.7730
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind760.60.7888
Predominantly Downwind737.70.8133
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore703.40.8530
Cape Doctor Coastal586.41.0232
Triple Number Coastal/Long Distance Low964.30.6222
Triple Number Coastal/Long Distance Medium705.30.8507
Triple Number Coastal/Long Distance High611.90.9806
Triple Number Windward/Leeward Low1243.30.4826
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High736.60.8146
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6222
Triple Number Coastal/Long Distance Medium0.8507
Triple Number Coastal/Long Distance High0.9806
Triple Number Windward/Leeward Low0.4826
Triple Number Windward/Leeward Medium0.6844
Triple Number Windward/Leeward High0.8146
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.6222
Triple Number Coastal/Long Distance Medium0.8507
Triple Number Coastal/Long Distance High0.9806
Triple Number Windward/Leeward Low0.4826
Triple Number Windward/Leeward Medium0.6844
Triple Number Windward/Leeward High0.8146
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance776.20.7730
Triple Number Coastal/Long Distance Low964.30.6222
Triple Number Coastal/Long Distance Medium705.30.8507
Triple Number Coastal/Long Distance High611.90.9806
Triple Number Windward/Leeward Low1243.30.4826
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High736.60.8146
Predominantly Upwind760.60.7888
Predominantly Downwind737.70.8133
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance2151.71396.51031.5841.2726.3663.7620.9563.1550.7
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance776.20.7730
Triple Number Coastal/Long Distance Low964.30.6222
Triple Number Coastal/Long Distance Medium705.30.8507
Triple Number Coastal/Long Distance High611.90.9806
Triple Number Windward/Leeward Low1243.30.4826
Triple Number Windward/Leeward Medium876.70.6844
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 Distance2151.71396.51031.5841.2726.3663.7620.9563.1550.7
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low964.30.6222
Triple Number AP Medium705.40.8506
Triple Number AP High611.90.9806
Triple Number Windward/Leeward Low1303.50.4603
Triple Number Windward/Leeward Medium876.70.6844
Triple Number Windward/Leeward High736.60.8146
Single Number Predominant Upwind794.80.7550
Single Number Predominant Reaching712.40.8422
Single Number Predominant Downwind778.40.7708
Predominant Upwind - Low1143.00.5249
Predominant Upwind - Low/Med851.60.7046
Predominant Upwind - Medium730.20.8217
Predominant Upwind - Med/High668.90.8970
Predominant Upwind - High653.50.9182
Predominant Downwind Low1221.30.4913
Predominant Downwind Low/Med863.70.6947
Predominant Downwind Medium704.20.8520
Predominant Downwind Med/High607.70.9873
Predominant Downwind High565.41.0611
Predominant Reaching Low1049.70.5716
Predominant Reaching Low/Med772.70.7765
Predominant Reaching Medium653.50.9181
Predominant Reaching Med/High586.81.0226
Predominant Reaching High559.71.0719
SA/DSPL Upwind16.64SA/DSPL Downwind16.64
Scoring OptionTODTOT
5-Band Windward/Leeward Low1470.90.4079
5-Band Windward/Leeward Low/Med1044.30.5746
5-Band Windward/Leeward Medium857.30.6998
5-Band Windward/Leeward Med/High748.90.8012
5-Band Windward/Leeward High710.90.8440
Windward/Leeward 60-40 Low1459.40.4111
Windward/Leeward 60-40 Low/Med1047.50.5728
Windward/Leeward 60-40 Medium870.10.6896
Windward/Leeward 60-40 Med/High771.30.7779
Windward/Leeward 60-40 High740.70.8100
5-Band AP Low1088.60.5512
5-Band AP Low/Med822.80.7292
5-Band AP Medium692.10.8669
5-Band AP Med/High620.10.9676
5-Band AP High594.21.0098
5-Band SF Bay Tour - Low1255.90.4778
5-Band SF Bay Tour - Low/Med997.50.6015
5-Band SF Bay Tour - Medium827.20.7253
5-Band SF Bay Tour - Med/High732.20.8194
5-Band SF Bay Tour - High700.90.8560
Chicago-Mac Upwind0.7273
Chicago-Mac All Purpose0.7363
Chicago-Mac Downwind0.7370
Bayview-Mac Cove Island0.5179
Bayview-Mac Shore0.5233
Harvest Moon Regatta606.30.9896
Double HandedClub Certificate2025
Bona DiaRSA-97
ORC
Central Rating Office
Issuing certificates for
SOUTH AFRICA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassMiuraMeasurement28/07/2025HINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA9.330Max. Beam3.148Draft1.766Displacement4,700Wetted area21.37IMS L7.820LSM07.845Acc. length9.330Sink (kg/mm) 14.98
VCGD0.144VCGM0.151RM Rated (kg·m) 77.9Limit of positive stability(°) N/AStability IndexN/ADefault crew weight170Declared crew weightN/A
PROPELLER
Propeller TypeSolid 3 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.330PBW0.090PIPA0.0136
PSDPHDPHL
PSAESL
ST1ST2ST3
ST4ST5
RIG
Forestay tensionAftInner stayMast materialAluminumSingle headsail furlerYesMainsail furlerArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstaysCheckstaysSpreaders1Rotating mastNo
P10.000IG11.636ISP11.636MDT10.125MDL10.160MDT2MDL2TLNo TaperMWGO
E3.095J3.990BAS1.301FSD0.040SFJSPL3.910WPLTPS4.000BD0.110MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date30/07/2025
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Double HandedClub Certificate2025
Bona DiaRSA-97
ORC
Central Rating Office
Issuing certificates for
SOUTH AFRICA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment00.150.651.141.942.5718.1928/07/2025
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment00.030.621.212.473.865.4011.15NoNo 28.7428/07/2025
CRUISER/RACER REQUIREMENTS*
Accommodation length9.3 mTable area0.44 m²Headroom1.65 mMinimum number of berths4Personal gear stowage0.16 m³Fresh water capacity66 lMinimum number of seats in cockpit4Food stowage0.24 m³Fuel capacity36 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.