Club Certificate2025
BASICJPN 3387
JAPAN SAILING FEDERATION
4-2, Kasumigaokacho,
Shinjuku, Tokyo
Japan
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 Angles41.7°41.7°39.4°37.0°36.1°35.8°35.6°35.7°36.9°
Beat VMG2.793.804.534.935.095.175.225.265.19
52°4.355.696.486.816.957.037.097.167.17
60°4.635.946.646.957.127.217.287.387.41
75°4.796.096.747.087.327.497.607.787.88
90°4.655.986.717.107.407.667.888.218.45
110°4.275.726.697.187.577.918.218.689.00
120°4.085.526.537.087.527.938.369.2710.09
135°3.524.926.036.757.227.678.139.3311.69
150°2.884.135.256.196.817.257.678.6310.20
Run VMG2.493.584.555.396.096.647.077.868.83
Gybe Angles144.4°144.4°149.6°154.4°162.6°170.5°177.2°177.2°144.1°
APH ToD:558.0CDL: 8.777APH ToT: 1.0753CertNo:250260
BOAT
ClassSEAM 31DesignerI.YOKOYAMABuilderTSUBOI YACHTAge date08/1999Series date06/1999Offset fileJCBIY89.OFFData fileJC250260
HULL
Length Overall9.500 mMaximum Beam3.238 mDraft2.000 mDisplacement3,167 kgDLR5.5318IMS DivisionPerformanceDynamic Allowance0.000%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.380m
CREW
Maximum weight528 kg(default)Minimum weight398 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail35.0235.93Headsail Luffed26.9926.99Headsail FlyingSymmetric61.4761.47Asymmetric
STORM SAIL AREAS (m²)
Trysail10.02Storm Jib7.20Heavy Weather Jib19.44
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.
Club Certificate2025
BASICJPN 3387
JAPAN SAILING FEDERATION
4-2, Kasumigaokacho,
Shinjuku, Tokyo
Japan
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 VMG1289.3946.9794.1730.5707.7696.6689.7684.0693.9
52°826.8632.2555.4528.8518.0512.1507.9502.7502.1
60°777.6605.7542.4518.2506.0499.4494.5487.9485.5
75°751.2590.7533.9508.5491.9480.8473.8463.0457.1
90°774.7601.9536.5507.1486.5469.8456.7438.7426.2
110°842.4629.0538.1501.5475.8455.0438.3414.9400.1
120°881.7651.9551.2508.3478.6453.7430.4388.3356.7
135°1022.4732.0596.6533.3498.9469.5442.6385.9308.0
150°1249.7871.0685.1581.8528.4496.8469.2417.1353.0
Run VMG1442.91005.7791.1667.8590.7541.9509.3458.0407.6
Selected Courses
Windward / Leeward1364.8976.3792.6699.1649.2619.3599.5571.0550.8
All purpose1023.6752.9631.1574.0543.1523.0507.7482.8461.2
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward675.00.8889
All purpose558.01.0753
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low692.00.8671
Triple Number Coastal/Long Distance Medium555.71.0797
Triple Number Coastal/Long Distance High502.21.1948
Triple Number Windward/Leeward Low884.40.6784
Triple Number Windward/Leeward Medium670.30.8951
Triple Number Windward/Leeward High593.81.0105
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance603.90.9935
Triple Number Coastal/Long Distance Low692.00.8671
Triple Number Coastal/Long Distance Medium555.71.0797
Triple Number Coastal/Long Distance High502.21.1948
Triple Number Windward/Leeward Low884.40.6784
Triple Number Windward/Leeward Medium670.30.8951
Triple Number Windward/Leeward High593.81.0105
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1456.5979.3749.8638.2576.5541.9512.7462.7441.2
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.8001
Downwind "popa"0.9202
70% up, 30% down "Ilhabela"0.8327
30% up, 70% down "Ilhabela-inverso"0.8805
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low692.00.8671
Triple Number Coastal/Long Distance Medium555.71.0797
Triple Number Coastal/Long Distance High502.21.1948
Triple Number Windward/Leeward Low884.40.6784
Triple Number Windward/Leeward Medium670.30.8951
Triple Number Windward/Leeward High593.81.0105
Predominantly Upwind597.51.0042
Predominantly Downwind569.61.0534
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low692.00.8671
Triple Number AP Medium555.81.0796
Triple Number AP High502.21.1948
Triple Number Windward/Leeward Low923.30.6499
Triple Number Windward/Leeward Medium670.30.8951
Triple Number Windward/Leeward High593.81.0105
Single Number Predominant Upwind617.30.9720
Single Number Predominant Reaching554.61.0819
Single Number Predominant Downwind592.01.0135
Predominant Upwind - Low807.10.7434
Predominant Upwind - Low/Med640.70.9365
Predominant Upwind - Medium583.11.0290
Predominant Upwind - Med/High552.61.0857
Predominant Upwind - High535.61.1203
Predominant Downwind Low848.30.7073
Predominant Downwind Low/Med639.50.9383
Predominant Downwind Medium552.61.0858
Predominant Downwind Med/High494.51.2132
Predominant Downwind High452.81.3250
Predominant Reaching Low738.30.8127
Predominant Reaching Low/Med584.91.0257
Predominant Reaching Medium526.01.1406
Predominant Reaching Med/High485.91.2347
Predominant Reaching High456.31.3149
SA/DSPL Upwind28.65SA/DSPL Downwind44.57
Scoring OptionTODTOT
5-Band Windward/Leeward Low1027.80.5838
5-Band Windward/Leeward Low/Med765.50.7838
5-Band Windward/Leeward Medium660.30.9087
5-Band Windward/Leeward Med/High602.20.9964
5-Band Windward/Leeward High572.41.0481
Windward/Leeward 60-40 Low1021.10.5876
Windward/Leeward 60-40 Low/Med768.70.7805
Windward/Leeward 60-40 Medium671.30.8938
Windward/Leeward 60-40 Med/High620.00.9677
Windward/Leeward 60-40 High595.31.0079
5-Band AP Low762.90.7864
5-Band AP Low/Med615.90.9741
5-Band AP Medium549.21.0924
5-Band AP Med/High509.01.1787
5-Band AP High483.41.2413
5-Band SF Bay Tour - Low884.80.6781
5-Band SF Bay Tour - Low/Med731.90.8198
5-Band SF Bay Tour - Medium639.60.9382
5-Band SF Bay Tour - Med/High588.61.0194
5-Band SF Bay Tour - High559.61.0722
Chicago-Mac Upwind0.9479
Chicago-Mac All Purpose0.9664
Chicago-Mac Downwind0.9780
Bayview-Mac Cove Island0.7259
Bayview-Mac Shore0.7325
Harvest Moon Regatta490.61.2229
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance603.90.9935
Triple Number Coastal/Long Distance Low692.00.8671
Triple Number Coastal/Long Distance Medium555.71.0797
Triple Number Coastal/Long Distance High502.21.1948
Triple Number Windward/Leeward Low884.40.6784
Triple Number Windward/Leeward Medium670.30.8951
Triple Number Windward/Leeward High593.81.0105
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1456.5979.3749.8638.2576.5541.9512.7462.7441.2
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance603.90.9935
Triple Number Coastal/Long Distance Low692.00.8671
Triple Number Coastal/Long Distance Medium555.71.0797
Triple Number Coastal/Long Distance High502.21.1948
Triple Number Windward/Leeward Low884.40.6784
Triple Number Windward/Leeward Medium670.30.8951
Triple Number Windward/Leeward High593.81.0105
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1456.5979.3749.8638.2576.5541.9512.7462.7441.2
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance603.9
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1456.5979.3749.8638.2576.5541.9512.7462.7441.2
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low692.00.8671
Triple Number Coastal/Long Distance Medium555.71.0797
Triple Number Coastal/Long Distance High502.21.1948
Triple Number Windward/Leeward Low884.40.6784
Triple Number Windward/Leeward Medium670.30.8951
Triple Number Windward/Leeward High593.81.0105
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating603.90.9935
FinRating, kevyt tuuli1010.50.9897
FinRating, kova tuuli484.81.0313
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low692.00.8671
Triple Number Coastal/Long Distance Medium555.71.0797
Triple Number Coastal/Long Distance High502.21.1948
Triple Number Windward/Leeward Low884.40.6784
Triple Number Windward/Leeward Medium670.30.8951
Triple Number Windward/Leeward High593.81.0105
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9935
Triple Number Coastal/Long Distance Low0.8671
Triple Number Coastal/Long Distance Medium1.0797
Triple Number Coastal/Long Distance High1.1948
Triple Number Windward/Leeward Low0.6784
Triple Number Windward/Leeward Medium0.8951
Triple Number Windward/Leeward High1.0105
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1456.5979.3749.8638.2576.5541.9512.7462.7441.2
For information
General Purpose Handicap (GPH)620.7
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance603.90.9935
Triple Number Coastal/Long Distance Low692.00.8671
Triple Number Coastal/Long Distance Medium555.71.0797
Triple Number Coastal/Long Distance High502.21.1948
Triple Number Windward/Leeward Low884.40.6784
Triple Number Windward/Leeward Medium670.30.8951
Triple Number Windward/Leeward High593.81.0105
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1456.5979.3749.8638.2576.5541.9512.7462.7441.2
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low692.00.8671
Triple Number Coastal/Long Distance Medium555.71.0797
Triple Number Coastal/Long Distance High502.21.1948
Triple Number Windward/Leeward Low884.40.6784
Triple Number Windward/Leeward Medium670.30.8951
Triple Number Windward/Leeward High593.81.0105
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance603.90.9935
Triple Number Coastal/Long Distance Low692.00.8671
Triple Number Coastal/Long Distance Medium555.71.0797
Triple Number Coastal/Long Distance High502.21.1948
Triple Number Windward/Leeward Low884.40.6784
Triple Number Windward/Leeward Medium670.30.8951
Triple Number Windward/Leeward High593.81.0105
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1456.5979.3749.8638.2576.5541.9512.7462.7441.2
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance603.90.9935
Triple Number Coastal/Long Distance Low692.00.8671
Triple Number Coastal/Long Distance Medium555.71.0797
Triple Number Coastal/Long Distance High502.21.1948
Triple Number Windward/Leeward Low884.40.6784
Triple Number Windward/Leeward Medium670.30.8951
Triple Number Windward/Leeward High593.81.0105
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1456.5979.3749.8638.2576.5541.9512.7462.7441.2
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low692.0
Triple Number Coastal/Long Distance Medium555.7
Triple Number Coastal/Long Distance High502.2
Triple Number Windward/Leeward Low884.4
Triple Number Windward/Leeward Medium670.3
Triple Number Windward/Leeward High593.8
Predominantly Upwind597.5
Predominantly Downwind569.6
Predominantly Reaching546.7
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance603.90.9935
Triple Number Coastal/Long Distance Low692.00.8671
Triple Number Coastal/Long Distance Medium555.71.0797
Triple Number Coastal/Long Distance High502.21.1948
Triple Number Windward/Leeward Low884.40.6784
Triple Number Windward/Leeward Medium670.30.8951
Triple Number Windward/Leeward High593.81.0105
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1456.5979.3749.8638.2576.5541.9512.7462.7441.2
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8671
Triple Number Coastal/Long Distance Medium1.0797
Triple Number Coastal/Long Distance High1.1948
Triple Number Windward/Leeward Low0.6784
Triple Number Windward/Leeward Medium0.8951
Triple Number Windward/Leeward High1.0105
Coastal/Long Distance0.9935
Predominantly Upwind1.0042
Predominantly Downwind1.0534
For information
General Purpose Handicap (GPH)620.7
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0753
Distanseseilas Trippeltall svak vind0.8671
Distanseseilas Trippeltall mellomvind1.0797
Distanseseilas Trippeltall sterk vind1.1948
Pølsebane Trippeltall svak vind0.6784
Pølsebane Trippeltall mellomvind0.8951
Pølsebane Trippeltall sterk vind1.0105
Motvind Singeltall1.0042
Medvind Singeltall1.0534
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low692.00.8671
Triple Number Coastal/Long Distance Medium555.71.0797
Triple Number Coastal/Long Distance High502.21.1948
Triple Number Windward/Leeward Low884.40.6784
Triple Number Windward/Leeward Medium670.30.8951
Triple Number Windward/Leeward High593.81.0105
Coastal/Long Distance603.90.9935
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind597.51.0042
Predominantly Downwind569.61.0534
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore556.81.0775
Cape Doctor Coastal467.71.2829
Triple Number Coastal/Long Distance Low692.00.8671
Triple Number Coastal/Long Distance Medium555.71.0797
Triple Number Coastal/Long Distance High502.21.1948
Triple Number Windward/Leeward Low884.40.6784
Triple Number Windward/Leeward Medium670.30.8951
Triple Number Windward/Leeward High593.81.0105
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8671
Triple Number Coastal/Long Distance Medium1.0797
Triple Number Coastal/Long Distance High1.1948
Triple Number Windward/Leeward Low0.6784
Triple Number Windward/Leeward Medium0.8951
Triple Number Windward/Leeward High1.0105
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8671
Triple Number Coastal/Long Distance Medium1.0797
Triple Number Coastal/Long Distance High1.1948
Triple Number Windward/Leeward Low0.6784
Triple Number Windward/Leeward Medium0.8951
Triple Number Windward/Leeward High1.0105
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance603.90.9935
Triple Number Coastal/Long Distance Low692.00.8671
Triple Number Coastal/Long Distance Medium555.71.0797
Triple Number Coastal/Long Distance High502.21.1948
Triple Number Windward/Leeward Low884.40.6784
Triple Number Windward/Leeward Medium670.30.8951
Triple Number Windward/Leeward High593.81.0105
Predominantly Upwind597.51.0042
Predominantly Downwind569.61.0534
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1456.5979.3749.8638.2576.5541.9512.7462.7441.2
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance603.90.9935
Triple Number Coastal/Long Distance Low692.00.8671
Triple Number Coastal/Long Distance Medium555.71.0797
Triple Number Coastal/Long Distance High502.21.1948
Triple Number Windward/Leeward Low884.40.6784
Triple Number Windward/Leeward Medium670.30.8951
Triple Number Windward/Leeward High593.81.0105
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1456.5979.3749.8638.2576.5541.9512.7462.7441.2
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low692.00.8671
Triple Number AP Medium555.81.0796
Triple Number AP High502.21.1948
Triple Number Windward/Leeward Low923.30.6499
Triple Number Windward/Leeward Medium670.30.8951
Triple Number Windward/Leeward High593.81.0105
Single Number Predominant Upwind617.30.9720
Single Number Predominant Reaching554.61.0819
Single Number Predominant Downwind592.01.0135
Predominant Upwind - Low807.10.7434
Predominant Upwind - Low/Med640.70.9365
Predominant Upwind - Medium583.11.0290
Predominant Upwind - Med/High552.61.0857
Predominant Upwind - High535.61.1203
Predominant Downwind Low848.30.7073
Predominant Downwind Low/Med639.50.9383
Predominant Downwind Medium552.61.0858
Predominant Downwind Med/High494.51.2132
Predominant Downwind High452.81.3250
Predominant Reaching Low738.30.8127
Predominant Reaching Low/Med584.91.0257
Predominant Reaching Medium526.01.1406
Predominant Reaching Med/High485.91.2347
Predominant Reaching High456.31.3149
SA/DSPL Upwind28.65SA/DSPL Downwind44.57
Scoring OptionTODTOT
5-Band Windward/Leeward Low1027.80.5838
5-Band Windward/Leeward Low/Med765.50.7838
5-Band Windward/Leeward Medium660.30.9087
5-Band Windward/Leeward Med/High602.20.9964
5-Band Windward/Leeward High572.41.0481
Windward/Leeward 60-40 Low1021.10.5876
Windward/Leeward 60-40 Low/Med768.70.7805
Windward/Leeward 60-40 Medium671.30.8938
Windward/Leeward 60-40 Med/High620.00.9677
Windward/Leeward 60-40 High595.31.0079
5-Band AP Low762.90.7864
5-Band AP Low/Med615.90.9741
5-Band AP Medium549.21.0924
5-Band AP Med/High509.01.1787
5-Band AP High483.41.2413
5-Band SF Bay Tour - Low884.80.6781
5-Band SF Bay Tour - Low/Med731.90.8198
5-Band SF Bay Tour - Medium639.60.9382
5-Band SF Bay Tour - Med/High588.61.0194
5-Band SF Bay Tour - High559.61.0722
Chicago-Mac Upwind0.9479
Chicago-Mac All Purpose0.9664
Chicago-Mac Downwind0.9780
Bayview-Mac Cove Island0.7259
Bayview-Mac Shore0.7325
Harvest Moon Regatta490.61.2229
Club Certificate2025
BASICJPN 3387
JAPAN SAILING FEDERATION
4-2, Kasumigaokacho,
Shinjuku, Tokyo
Japan
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassSEAM 31MeasurementHINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA9.500Max. Beam3.238Draft2.000Displacement3,167Wetted area17.84IMS L8.651LSM08.302Acc. length9.500Sink (kg/mm) 13.91
VCGD-0.055VCGM-0.057RM Rated (kg·m) 69.6Limit of positive stability(°) N/AStability IndexN/ADefault crew weight528Declared crew weightN/A
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.380PBWPIPA0.0006
EDLST1ST2
ST3ST4ST5
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders2Rotating mastNo
P12.500IG12.000ISP12.000MDT10.100MDL10.156MDT2MDL2TLTaperMWGO
E4.580J3.460BAS1.600FSDFoilSFJ0.000SPL3.494WPLTPSBDMWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date01/08/1999
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Club Certificate2025
BASICJPN 3387
JAPAN SAILING FEDERATION
4-2, Kasumigaokacho,
Shinjuku, Tokyo
Japan
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentORC0.221.081.883.043.8735.02* Copied from legacy *
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentORC0.080.601.142.293.454.6611.67NoNo 26.9930/05/2022
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateCommentS111.8611.8611.866.226.2261.47S211.6011.6011.606.396.1961.3813/01/2023