Club Certificate2025
KAOBAFRA-17166
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°40.6°38.9°38.0°37.7°37.6°37.8°39.5°
Beat VMG2.533.514.304.794.985.075.125.145.00
52°3.965.356.336.837.047.147.197.247.17
60°4.215.636.567.017.257.367.447.517.48
75°4.345.786.717.167.487.727.868.038.11
90°4.175.626.627.177.557.918.218.608.83
110°4.025.576.747.347.798.148.428.829.52
120°3.875.396.587.287.838.358.839.5310.02
135°3.394.826.046.917.488.078.7210.2011.98
150°2.814.075.236.236.987.518.059.3211.14
Run VMG2.433.524.535.416.156.747.228.229.65
Gybe Angles145.0°145.0°148.7°151.9°157.6°165.1°167.8°163.5°146.0°
APH ToD:556.1CDL: 8.970APH ToT: 1.0789CertNo:25304a
BOAT
ClassKAOBA 31DesignerFAYE XavierBuilderNAVAL FORCEAge date06/1996Series date03/1996Offset fileKAOBA.OFFData fileF17166_25304a
HULL
Length Overall9.500 mMaximum Beam3.402 mDraft2.038 mDisplacement2,945 kgDLR3.6949IMS DivisionCruiser/RacerDynamic Allowance0.140%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFeathering 2 bladesDiameter0.400m
CREW
Maximum weight618 kg(default)Minimum weight488 kg ✱ when appliedNon Manual PowerCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail28.2028.82Headsail Luffed27.1427.14Headsail FlyingSymmetric72.8572.85Asymmetric
STORM SAIL AREAS (m²)
Trysail8.20Storm Jib8.43Heavy Weather Jib22.76
SAIL LIMITS
Headsails5Spinnakers4
STABILITY
Righting MomentN/AStability IndexN/A
COMMENTS
2023-2025: NC /
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
KAOBAFRA-17166
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 VMG1425.31024.3837.3751.8722.5709.5702.9699.9719.4
52°909.8672.6568.5526.8511.2504.3500.4496.9502.1
60°854.6640.0548.8513.2496.7488.8484.1479.4481.5
75°829.5622.9536.3502.6481.2466.4458.0448.1443.8
90°863.3640.6543.5502.0476.7455.0438.5418.4407.8
110°896.1646.0533.8490.4462.0442.1427.7408.1378.3
120°930.5667.4546.9494.8460.0431.1407.9377.7359.2
135°1062.2746.8596.1521.3481.4445.9413.1353.0300.4
150°1282.8885.1688.7577.5515.7479.7447.0386.1323.0
Run VMG1482.21022.0795.3665.9585.3533.8498.4437.8373.0
Selected Courses
Windward / Leeward1452.81023.1816.3708.8653.9621.7600.7568.8546.2
All purpose1099.8788.4643.0573.7537.7514.7497.8472.4454.1
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward683.60.8778
All purpose556.11.0789
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low715.70.8383
Triple Number Coastal/Long Distance Medium552.71.0855
Triple Number Coastal/Long Distance High492.51.2183
Triple Number Windward/Leeward Low919.70.6524
Triple Number Windward/Leeward Medium677.70.8854
Triple Number Windward/Leeward High594.01.0101
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance604.30.9929
Triple Number Coastal/Long Distance Low715.70.8383
Triple Number Coastal/Long Distance Medium552.71.0855
Triple Number Coastal/Long Distance High492.51.2183
Triple Number Windward/Leeward Low919.70.6524
Triple Number Windward/Leeward Medium677.70.8854
Triple Number Windward/Leeward High594.01.0101
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1547.91023.0769.4642.4573.1533.9501.7450.3433.3
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7709
Downwind "popa"0.9254
70% up, 30% down "Ilhabela"0.8116
30% up, 70% down "Ilhabela-inverso"0.8729
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low715.70.8383
Triple Number Coastal/Long Distance Medium552.71.0855
Triple Number Coastal/Long Distance High492.51.2183
Triple Number Windward/Leeward Low919.70.6524
Triple Number Windward/Leeward Medium677.70.8854
Triple Number Windward/Leeward High594.01.0101
Predominantly Upwind602.00.9967
Predominantly Downwind564.31.0633
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low715.70.8383
Triple Number AP Medium552.81.0854
Triple Number AP High492.51.2183
Triple Number Windward/Leeward Low962.40.6235
Triple Number Windward/Leeward Medium677.70.8854
Triple Number Windward/Leeward High594.01.0101
Single Number Predominant Upwind626.40.9578
Single Number Predominant Reaching553.51.0840
Single Number Predominant Downwind589.41.0180
Predominant Upwind - Low858.80.6987
Predominant Upwind - Low/Med655.70.9150
Predominant Upwind - Medium583.61.0282
Predominant Upwind - Med/High548.01.0949
Predominant Upwind - High531.61.1286
Predominant Downwind Low878.30.6831
Predominant Downwind Low/Med643.20.9328
Predominant Downwind Medium544.71.1016
Predominant Downwind Med/High479.01.2525
Predominant Downwind High434.51.3810
Predominant Reaching Low775.70.7735
Predominant Reaching Low/Med590.21.0167
Predominant Reaching Medium517.91.1585
Predominant Reaching Med/High470.41.2755
Predominant Reaching High439.81.3643
SA/DSPL Upwind26.84SA/DSPL Downwind49.01
Scoring OptionTODTOT
5-Band Windward/Leeward Low1079.10.5560
5-Band Windward/Leeward Low/Med784.90.7645
5-Band Windward/Leeward Medium666.60.9000
5-Band Windward/Leeward Med/High603.30.9946
5-Band Windward/Leeward High570.41.0518
Windward/Leeward 60-40 Low1078.80.5562
Windward/Leeward 60-40 Low/Med791.40.7581
Windward/Leeward 60-40 Medium679.90.8825
Windward/Leeward 60-40 Med/High623.70.9621
Windward/Leeward 60-40 High597.11.0048
5-Band AP Low796.70.7531
5-Band AP Low/Med624.40.9609
5-Band AP Medium545.21.1005
5-Band AP Med/High499.71.2007
5-Band AP High473.61.2668
5-Band SF Bay Tour - Low926.00.6479
5-Band SF Bay Tour - Low/Med750.00.8000
5-Band SF Bay Tour - Medium643.80.9319
5-Band SF Bay Tour - Med/High587.11.0219
5-Band SF Bay Tour - High556.71.0777
Chicago-Mac Upwind0.9306
Chicago-Mac All Purpose0.9573
Chicago-Mac Downwind0.9782
Bayview-Mac Cove Island0.6966
Bayview-Mac Shore0.7020
Harvest Moon Regatta477.61.2563
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance604.30.9929
Triple Number Coastal/Long Distance Low715.70.8383
Triple Number Coastal/Long Distance Medium552.71.0855
Triple Number Coastal/Long Distance High492.51.2183
Triple Number Windward/Leeward Low919.70.6524
Triple Number Windward/Leeward Medium677.70.8854
Triple Number Windward/Leeward High594.01.0101
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1547.91023.0769.4642.4573.1533.9501.7450.3433.3
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance604.30.9929
Triple Number Coastal/Long Distance Low715.70.8383
Triple Number Coastal/Long Distance Medium552.71.0855
Triple Number Coastal/Long Distance High492.51.2183
Triple Number Windward/Leeward Low919.70.6524
Triple Number Windward/Leeward Medium677.70.8854
Triple Number Windward/Leeward High594.01.0101
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1547.91023.0769.4642.4573.1533.9501.7450.3433.3
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance604.3
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1547.91023.0769.4642.4573.1533.9501.7450.3433.3
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low715.70.8383
Triple Number Coastal/Long Distance Medium552.71.0855
Triple Number Coastal/Long Distance High492.51.2183
Triple Number Windward/Leeward Low919.70.6524
Triple Number Windward/Leeward Medium677.70.8854
Triple Number Windward/Leeward High594.01.0101
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating604.30.9929
FinRating, kevyt tuuli1062.30.9414
FinRating, kova tuuli476.01.0505
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low715.70.8383
Triple Number Coastal/Long Distance Medium552.71.0855
Triple Number Coastal/Long Distance High492.51.2183
Triple Number Windward/Leeward Low919.70.6524
Triple Number Windward/Leeward Medium677.70.8854
Triple Number Windward/Leeward High594.01.0101
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9929
Triple Number Coastal/Long Distance Low0.8383
Triple Number Coastal/Long Distance Medium1.0855
Triple Number Coastal/Long Distance High1.2183
Triple Number Windward/Leeward Low0.6524
Triple Number Windward/Leeward Medium0.8854
Triple Number Windward/Leeward High1.0101
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1547.91023.0769.4642.4573.1533.9501.7450.3433.3
For information
General Purpose Handicap (GPH)624.6
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance604.30.9929
Triple Number Coastal/Long Distance Low715.70.8383
Triple Number Coastal/Long Distance Medium552.71.0855
Triple Number Coastal/Long Distance High492.51.2183
Triple Number Windward/Leeward Low919.70.6524
Triple Number Windward/Leeward Medium677.70.8854
Triple Number Windward/Leeward High594.01.0101
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1547.91023.0769.4642.4573.1533.9501.7450.3433.3
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low715.70.8383
Triple Number Coastal/Long Distance Medium552.71.0855
Triple Number Coastal/Long Distance High492.51.2183
Triple Number Windward/Leeward Low919.70.6524
Triple Number Windward/Leeward Medium677.70.8854
Triple Number Windward/Leeward High594.01.0101
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance604.30.9929
Triple Number Coastal/Long Distance Low715.70.8383
Triple Number Coastal/Long Distance Medium552.71.0855
Triple Number Coastal/Long Distance High492.51.2183
Triple Number Windward/Leeward Low919.70.6524
Triple Number Windward/Leeward Medium677.70.8854
Triple Number Windward/Leeward High594.01.0101
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1547.91023.0769.4642.4573.1533.9501.7450.3433.3
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance604.30.9929
Triple Number Coastal/Long Distance Low715.70.8383
Triple Number Coastal/Long Distance Medium552.71.0855
Triple Number Coastal/Long Distance High492.51.2183
Triple Number Windward/Leeward Low919.70.6524
Triple Number Windward/Leeward Medium677.70.8854
Triple Number Windward/Leeward High594.01.0101
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1547.91023.0769.4642.4573.1533.9501.7450.3433.3
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low715.7
Triple Number Coastal/Long Distance Medium552.7
Triple Number Coastal/Long Distance High492.5
Triple Number Windward/Leeward Low919.7
Triple Number Windward/Leeward Medium677.7
Triple Number Windward/Leeward High594.0
Predominantly Upwind602.0
Predominantly Downwind564.3
Predominantly Reaching541.1
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance604.30.9929
Triple Number Coastal/Long Distance Low715.70.8383
Triple Number Coastal/Long Distance Medium552.71.0855
Triple Number Coastal/Long Distance High492.51.2183
Triple Number Windward/Leeward Low919.70.6524
Triple Number Windward/Leeward Medium677.70.8854
Triple Number Windward/Leeward High594.01.0101
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1547.91023.0769.4642.4573.1533.9501.7450.3433.3
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8383
Triple Number Coastal/Long Distance Medium1.0855
Triple Number Coastal/Long Distance High1.2183
Triple Number Windward/Leeward Low0.6524
Triple Number Windward/Leeward Medium0.8854
Triple Number Windward/Leeward High1.0101
Coastal/Long Distance0.9929
Predominantly Upwind0.9967
Predominantly Downwind1.0633
For information
General Purpose Handicap (GPH)624.6
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0789
Distanseseilas Trippeltall svak vind0.8383
Distanseseilas Trippeltall mellomvind1.0855
Distanseseilas Trippeltall sterk vind1.2183
Pølsebane Trippeltall svak vind0.6524
Pølsebane Trippeltall mellomvind0.8854
Pølsebane Trippeltall sterk vind1.0101
Motvind Singeltall0.9967
Medvind Singeltall1.0633
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low715.70.8383
Triple Number Coastal/Long Distance Medium552.71.0855
Triple Number Coastal/Long Distance High492.51.2183
Triple Number Windward/Leeward Low919.70.6524
Triple Number Windward/Leeward Medium677.70.8854
Triple Number Windward/Leeward High594.01.0101
Coastal/Long Distance604.30.9929
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind602.00.9967
Predominantly Downwind564.31.0633
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore553.01.0850
Cape Doctor Coastal459.61.3056
Triple Number Coastal/Long Distance Low715.70.8383
Triple Number Coastal/Long Distance Medium552.71.0855
Triple Number Coastal/Long Distance High492.51.2183
Triple Number Windward/Leeward Low919.70.6524
Triple Number Windward/Leeward Medium677.70.8854
Triple Number Windward/Leeward High594.01.0101
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8383
Triple Number Coastal/Long Distance Medium1.0855
Triple Number Coastal/Long Distance High1.2183
Triple Number Windward/Leeward Low0.6524
Triple Number Windward/Leeward Medium0.8854
Triple Number Windward/Leeward High1.0101
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8383
Triple Number Coastal/Long Distance Medium1.0855
Triple Number Coastal/Long Distance High1.2183
Triple Number Windward/Leeward Low0.6524
Triple Number Windward/Leeward Medium0.8854
Triple Number Windward/Leeward High1.0101
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance604.30.9929
Triple Number Coastal/Long Distance Low715.70.8383
Triple Number Coastal/Long Distance Medium552.71.0855
Triple Number Coastal/Long Distance High492.51.2183
Triple Number Windward/Leeward Low919.70.6524
Triple Number Windward/Leeward Medium677.70.8854
Triple Number Windward/Leeward High594.01.0101
Predominantly Upwind602.00.9967
Predominantly Downwind564.31.0633
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1547.91023.0769.4642.4573.1533.9501.7450.3433.3
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance604.30.9929
Triple Number Coastal/Long Distance Low715.70.8383
Triple Number Coastal/Long Distance Medium552.71.0855
Triple Number Coastal/Long Distance High492.51.2183
Triple Number Windward/Leeward Low919.70.6524
Triple Number Windward/Leeward Medium677.70.8854
Triple Number Windward/Leeward High594.01.0101
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1547.91023.0769.4642.4573.1533.9501.7450.3433.3
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low715.70.8383
Triple Number AP Medium552.81.0854
Triple Number AP High492.51.2183
Triple Number Windward/Leeward Low962.40.6235
Triple Number Windward/Leeward Medium677.70.8854
Triple Number Windward/Leeward High594.01.0101
Single Number Predominant Upwind626.40.9578
Single Number Predominant Reaching553.51.0840
Single Number Predominant Downwind589.41.0180
Predominant Upwind - Low858.80.6987
Predominant Upwind - Low/Med655.70.9150
Predominant Upwind - Medium583.61.0282
Predominant Upwind - Med/High548.01.0949
Predominant Upwind - High531.61.1286
Predominant Downwind Low878.30.6831
Predominant Downwind Low/Med643.20.9328
Predominant Downwind Medium544.71.1016
Predominant Downwind Med/High479.01.2525
Predominant Downwind High434.51.3810
Predominant Reaching Low775.70.7735
Predominant Reaching Low/Med590.21.0167
Predominant Reaching Medium517.91.1585
Predominant Reaching Med/High470.41.2755
Predominant Reaching High439.81.3643
SA/DSPL Upwind26.84SA/DSPL Downwind49.01
Scoring OptionTODTOT
5-Band Windward/Leeward Low1079.10.5560
5-Band Windward/Leeward Low/Med784.90.7645
5-Band Windward/Leeward Medium666.60.9000
5-Band Windward/Leeward Med/High603.30.9946
5-Band Windward/Leeward High570.41.0518
Windward/Leeward 60-40 Low1078.80.5562
Windward/Leeward 60-40 Low/Med791.40.7581
Windward/Leeward 60-40 Medium679.90.8825
Windward/Leeward 60-40 Med/High623.70.9621
Windward/Leeward 60-40 High597.11.0048
5-Band AP Low796.70.7531
5-Band AP Low/Med624.40.9609
5-Band AP Medium545.21.1005
5-Band AP Med/High499.71.2007
5-Band AP High473.61.2668
5-Band SF Bay Tour - Low926.00.6479
5-Band SF Bay Tour - Low/Med750.00.8000
5-Band SF Bay Tour - Medium643.80.9319
5-Band SF Bay Tour - Med/High587.11.0219
5-Band SF Bay Tour - High556.71.0777
Chicago-Mac Upwind0.9306
Chicago-Mac All Purpose0.9573
Chicago-Mac Downwind0.9782
Bayview-Mac Cove Island0.6966
Bayview-Mac Shore0.7020
Harvest Moon Regatta477.61.2563
Club Certificate2025
KAOBAFRA-17166
Centre de Calcul FFVoile
17 rue Henri Bocquillon
75015 Paris
France
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassKAOBA 31MeasurementHINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA9.500Max. Beam3.402Draft2.038Displacement2,945Wetted area18.73IMS L9.396LSM09.271Acc. length9.500Sink (kg/mm) 13.86
VCGD0.028VCGM0.028RM Rated (kg·m) 50.0Limit of positive stability(°) N/AStability IndexN/ADefault crew weight618Declared crew weightN/A
PROPELLER
Propeller TypeFeathering 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.400PBWPIPA0.0029
EDL1.070ST10.010ST2
ST3ST40.112ST50.285
RIG
Forestay tensionAftInner stayMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders2Rotating mastNo
P11.500IG12.890ISP12.979MDT10.119MDL10.179MDT20.119MDL20.179TL0.000MW0.179GO0.206
E4.070J3.800BAS1.500FSD0.034SFJ0.220SPL4.000WPLTPSBD0.118MWT87.90MCG4.380
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered0.028Flotation Date01/01/2013
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
KAOBAFRA-17166
Centre de Calcul FFVoile
17 rue Henri Bocquillon
75015 Paris
France
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentM10.150.881.582.643.4728.2028/03/2017
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentG20.080.551.042.114.6512.00NoNo 27.1416/06/2021Course
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateCommentS112.4012.4012.407.057.0572.8527/03/2017
CRUISER/RACER REQUIREMENTS*
Accommodation length9.5 mTable area0.44 m²Headroom1.67 mMinimum number of berths4Personal gear stowage0.16 m³Fresh water capacity70 lMinimum number of seats in cockpit4Food stowage0.24 m³Fuel capacity40 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.