Double HandedClub 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 Angles41.5°41.5°39.4°38.1°37.6°37.4°37.8°38.5°41.0°
Beat VMG2.883.834.444.714.834.884.924.914.71
52°4.435.716.406.656.766.826.876.916.84
60°4.685.966.586.836.947.017.077.137.11
75°4.856.126.717.007.197.307.407.537.58
90°4.746.046.717.067.337.557.727.988.14
110°4.355.776.687.137.487.737.938.328.79
120°4.165.596.567.087.507.898.278.829.11
135°3.584.996.106.807.277.718.199.4211.13
150°2.924.195.326.246.867.317.768.8310.64
Run VMG2.533.634.605.446.146.687.127.969.22
Gybe Angles144.0°144.0°149.4°154.7°162.6°170.0°176.3°173.6°147.7°
APH ToD:567.4CDL: 8.243APH ToT: 1.0574CertNo: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 weight170 kg(default)Minimum weight120 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.
Double HandedClub 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 VMG1251.1940.1810.4764.1745.9737.3731.6732.9764.3
52°812.4630.2562.9541.3532.5527.5523.9520.9526.1
60°768.6604.4547.5527.4518.6513.2509.1504.7506.7
75°742.9588.4536.4514.2500.9493.0486.4477.8475.1
90°760.0596.0536.8509.7491.2477.0466.2451.2442.0
110°827.7623.9539.1504.9481.5466.0453.7432.8409.5
120°864.6643.7548.5508.5480.3456.4435.3408.4395.3
135°1006.0721.7589.9529.6495.5466.7439.6382.3323.3
150°1231.4859.5677.3576.7525.0492.4463.7407.8338.2
Run VMG1421.5992.4782.0661.5586.7538.8505.8452.1390.6
Selected Courses
Windward / Leeward1333.8966.3796.2712.8666.3638.0618.7592.5577.4
All purpose1002.9746.0633.4582.3553.9535.5521.1498.9483.5
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward689.50.8702
All purpose567.41.0574
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low689.70.8700
Triple Number Coastal/Long Distance Medium565.41.0612
Triple Number Coastal/Long Distance High516.41.1619
Triple Number Windward/Leeward Low881.20.6809
Triple Number Windward/Leeward Medium685.60.8752
Triple Number Windward/Leeward High613.70.9777
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance614.20.9769
Triple Number Coastal/Long Distance Low689.70.8700
Triple Number Coastal/Long Distance Medium565.41.0612
Triple Number Coastal/Long Distance High516.41.1619
Triple Number Windward/Leeward Low881.20.6809
Triple Number Windward/Leeward Medium685.60.8752
Triple Number Windward/Leeward High613.70.9777
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1421.4968.9752.5648.8589.5554.8525.3477.8463.2
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7689
Downwind "popa"0.9293
70% up, 30% down "Ilhabela"0.8109
30% up, 70% down "Ilhabela-inverso"0.8746
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low689.70.8700
Triple Number Coastal/Long Distance Medium565.41.0612
Triple Number Coastal/Long Distance High516.41.1619
Triple Number Windward/Leeward Low881.20.6809
Triple Number Windward/Leeward Medium685.60.8752
Triple Number Windward/Leeward High613.70.9777
Predominantly Upwind611.80.9807
Predominantly Downwind570.81.0512
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low689.70.8700
Triple Number AP Medium565.41.0611
Triple Number AP High516.41.1619
Triple Number Windward/Leeward Low918.40.6533
Triple Number Windward/Leeward Medium685.60.8752
Triple Number Windward/Leeward High613.70.9777
Single Number Predominant Upwind630.50.9516
Single Number Predominant Reaching558.91.0736
Single Number Predominant Downwind592.61.0125
Predominant Upwind - Low800.10.7500
Predominant Upwind - Low/Med649.70.9235
Predominant Upwind - Medium599.41.0010
Predominant Upwind - Med/High572.51.0481
Predominant Upwind - High559.71.0720
Predominant Downwind Low838.10.7159
Predominant Downwind Low/Med637.90.9406
Predominant Downwind Medium555.01.0810
Predominant Downwind Med/High498.81.2028
Predominant Downwind High458.51.3087
Predominant Reaching Low730.40.8215
Predominant Reaching Low/Med586.41.0232
Predominant Reaching Medium531.91.1281
Predominant Reaching Med/High494.61.2132
Predominant Reaching High467.91.2822
SA/DSPL Upwind28.65SA/DSPL Downwind44.57
Scoring OptionTODTOT
5-Band Windward/Leeward Low1016.30.5904
5-Band Windward/Leeward Low/Med772.70.7765
5-Band Windward/Leeward Medium676.10.8874
5-Band Windward/Leeward Med/High621.60.9653
5-Band Windward/Leeward High594.41.0094
Windward/Leeward 60-40 Low1010.10.5940
Windward/Leeward 60-40 Low/Med778.90.7704
Windward/Leeward 60-40 Medium691.20.8680
Windward/Leeward 60-40 Med/High644.10.9316
Windward/Leeward 60-40 High623.20.9628
5-Band AP Low755.40.7942
5-Band AP Low/Med620.20.9674
5-Band AP Medium559.41.0725
5-Band AP Med/High522.61.1482
5-Band AP High500.11.1998
5-Band SF Bay Tour - Low878.70.6828
5-Band SF Bay Tour - Low/Med739.70.8111
5-Band SF Bay Tour - Medium655.90.9148
5-Band SF Bay Tour - Med/High608.40.9862
5-Band SF Bay Tour - High583.01.0291
Chicago-Mac Upwind0.9298
Chicago-Mac All Purpose0.9570
Chicago-Mac Downwind0.9782
Bayview-Mac Cove Island0.7290
Bayview-Mac Shore0.7357
Harvest Moon Regatta495.41.2112
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance614.20.9769
Triple Number Coastal/Long Distance Low689.70.8700
Triple Number Coastal/Long Distance Medium565.41.0612
Triple Number Coastal/Long Distance High516.41.1619
Triple Number Windward/Leeward Low881.20.6809
Triple Number Windward/Leeward Medium685.60.8752
Triple Number Windward/Leeward High613.70.9777
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1421.4968.9752.5648.8589.5554.8525.3477.8463.2
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance614.20.9769
Triple Number Coastal/Long Distance Low689.70.8700
Triple Number Coastal/Long Distance Medium565.41.0612
Triple Number Coastal/Long Distance High516.41.1619
Triple Number Windward/Leeward Low881.20.6809
Triple Number Windward/Leeward Medium685.60.8752
Triple Number Windward/Leeward High613.70.9777
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1421.4968.9752.5648.8589.5554.8525.3477.8463.2
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance614.2
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1421.4968.9752.5648.8589.5554.8525.3477.8463.2
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low689.70.8700
Triple Number Coastal/Long Distance Medium565.41.0612
Triple Number Coastal/Long Distance High516.41.1619
Triple Number Windward/Leeward Low881.20.6809
Triple Number Windward/Leeward Medium685.60.8752
Triple Number Windward/Leeward High613.70.9777
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating614.20.9769
FinRating, kevyt tuuli997.51.0025
FinRating, kova tuuli503.50.9930
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low689.70.8700
Triple Number Coastal/Long Distance Medium565.41.0612
Triple Number Coastal/Long Distance High516.41.1619
Triple Number Windward/Leeward Low881.20.6809
Triple Number Windward/Leeward Medium685.60.8752
Triple Number Windward/Leeward High613.70.9777
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9769
Triple Number Coastal/Long Distance Low0.8700
Triple Number Coastal/Long Distance Medium1.0612
Triple Number Coastal/Long Distance High1.1619
Triple Number Windward/Leeward Low0.6809
Triple Number Windward/Leeward Medium0.8752
Triple Number Windward/Leeward High0.9777
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1421.4968.9752.5648.8589.5554.8525.3477.8463.2
For information
General Purpose Handicap (GPH)627.8
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance614.20.9769
Triple Number Coastal/Long Distance Low689.70.8700
Triple Number Coastal/Long Distance Medium565.41.0612
Triple Number Coastal/Long Distance High516.41.1619
Triple Number Windward/Leeward Low881.20.6809
Triple Number Windward/Leeward Medium685.60.8752
Triple Number Windward/Leeward High613.70.9777
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1421.4968.9752.5648.8589.5554.8525.3477.8463.2
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low689.70.8700
Triple Number Coastal/Long Distance Medium565.41.0612
Triple Number Coastal/Long Distance High516.41.1619
Triple Number Windward/Leeward Low881.20.6809
Triple Number Windward/Leeward Medium685.60.8752
Triple Number Windward/Leeward High613.70.9777
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance614.20.9769
Triple Number Coastal/Long Distance Low689.70.8700
Triple Number Coastal/Long Distance Medium565.41.0612
Triple Number Coastal/Long Distance High516.41.1619
Triple Number Windward/Leeward Low881.20.6809
Triple Number Windward/Leeward Medium685.60.8752
Triple Number Windward/Leeward High613.70.9777
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1421.4968.9752.5648.8589.5554.8525.3477.8463.2
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance614.20.9769
Triple Number Coastal/Long Distance Low689.70.8700
Triple Number Coastal/Long Distance Medium565.41.0612
Triple Number Coastal/Long Distance High516.41.1619
Triple Number Windward/Leeward Low881.20.6809
Triple Number Windward/Leeward Medium685.60.8752
Triple Number Windward/Leeward High613.70.9777
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1421.4968.9752.5648.8589.5554.8525.3477.8463.2
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low689.7
Triple Number Coastal/Long Distance Medium565.4
Triple Number Coastal/Long Distance High516.4
Triple Number Windward/Leeward Low881.2
Triple Number Windward/Leeward Medium685.6
Triple Number Windward/Leeward High613.7
Predominantly Upwind611.8
Predominantly Downwind570.8
Predominantly Reaching549.8
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance614.20.9769
Triple Number Coastal/Long Distance Low689.70.8700
Triple Number Coastal/Long Distance Medium565.41.0612
Triple Number Coastal/Long Distance High516.41.1619
Triple Number Windward/Leeward Low881.20.6809
Triple Number Windward/Leeward Medium685.60.8752
Triple Number Windward/Leeward High613.70.9777
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1421.4968.9752.5648.8589.5554.8525.3477.8463.2
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8700
Triple Number Coastal/Long Distance Medium1.0612
Triple Number Coastal/Long Distance High1.1619
Triple Number Windward/Leeward Low0.6809
Triple Number Windward/Leeward Medium0.8752
Triple Number Windward/Leeward High0.9777
Coastal/Long Distance0.9769
Predominantly Upwind0.9807
Predominantly Downwind1.0512
For information
General Purpose Handicap (GPH)627.8
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0574
Distanseseilas Trippeltall svak vind0.8700
Distanseseilas Trippeltall mellomvind1.0612
Distanseseilas Trippeltall sterk vind1.1619
Pølsebane Trippeltall svak vind0.6809
Pølsebane Trippeltall mellomvind0.8752
Pølsebane Trippeltall sterk vind0.9777
Motvind Singeltall0.9807
Medvind Singeltall1.0512
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low689.70.8700
Triple Number Coastal/Long Distance Medium565.41.0612
Triple Number Coastal/Long Distance High516.41.1619
Triple Number Windward/Leeward Low881.20.6809
Triple Number Windward/Leeward Medium685.60.8752
Triple Number Windward/Leeward High613.70.9777
Coastal/Long Distance614.20.9769
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind611.80.9807
Predominantly Downwind570.81.0512
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore581.91.0310
Cape Doctor Coastal488.11.2292
Triple Number Coastal/Long Distance Low689.70.8700
Triple Number Coastal/Long Distance Medium565.41.0612
Triple Number Coastal/Long Distance High516.41.1619
Triple Number Windward/Leeward Low881.20.6809
Triple Number Windward/Leeward Medium685.60.8752
Triple Number Windward/Leeward High613.70.9777
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8700
Triple Number Coastal/Long Distance Medium1.0612
Triple Number Coastal/Long Distance High1.1619
Triple Number Windward/Leeward Low0.6809
Triple Number Windward/Leeward Medium0.8752
Triple Number Windward/Leeward High0.9777
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8700
Triple Number Coastal/Long Distance Medium1.0612
Triple Number Coastal/Long Distance High1.1619
Triple Number Windward/Leeward Low0.6809
Triple Number Windward/Leeward Medium0.8752
Triple Number Windward/Leeward High0.9777
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance614.20.9769
Triple Number Coastal/Long Distance Low689.70.8700
Triple Number Coastal/Long Distance Medium565.41.0612
Triple Number Coastal/Long Distance High516.41.1619
Triple Number Windward/Leeward Low881.20.6809
Triple Number Windward/Leeward Medium685.60.8752
Triple Number Windward/Leeward High613.70.9777
Predominantly Upwind611.80.9807
Predominantly Downwind570.81.0512
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1421.4968.9752.5648.8589.5554.8525.3477.8463.2
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance614.20.9769
Triple Number Coastal/Long Distance Low689.70.8700
Triple Number Coastal/Long Distance Medium565.41.0612
Triple Number Coastal/Long Distance High516.41.1619
Triple Number Windward/Leeward Low881.20.6809
Triple Number Windward/Leeward Medium685.60.8752
Triple Number Windward/Leeward High613.70.9777
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1421.4968.9752.5648.8589.5554.8525.3477.8463.2
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low689.70.8700
Triple Number AP Medium565.41.0611
Triple Number AP High516.41.1619
Triple Number Windward/Leeward Low918.40.6533
Triple Number Windward/Leeward Medium685.60.8752
Triple Number Windward/Leeward High613.70.9777
Single Number Predominant Upwind630.50.9516
Single Number Predominant Reaching558.91.0736
Single Number Predominant Downwind592.61.0125
Predominant Upwind - Low800.10.7500
Predominant Upwind - Low/Med649.70.9235
Predominant Upwind - Medium599.41.0010
Predominant Upwind - Med/High572.51.0481
Predominant Upwind - High559.71.0720
Predominant Downwind Low838.10.7159
Predominant Downwind Low/Med637.90.9406
Predominant Downwind Medium555.01.0810
Predominant Downwind Med/High498.81.2028
Predominant Downwind High458.51.3087
Predominant Reaching Low730.40.8215
Predominant Reaching Low/Med586.41.0232
Predominant Reaching Medium531.91.1281
Predominant Reaching Med/High494.61.2132
Predominant Reaching High467.91.2822
SA/DSPL Upwind28.65SA/DSPL Downwind44.57
Scoring OptionTODTOT
5-Band Windward/Leeward Low1016.30.5904
5-Band Windward/Leeward Low/Med772.70.7765
5-Band Windward/Leeward Medium676.10.8874
5-Band Windward/Leeward Med/High621.60.9653
5-Band Windward/Leeward High594.41.0094
Windward/Leeward 60-40 Low1010.10.5940
Windward/Leeward 60-40 Low/Med778.90.7704
Windward/Leeward 60-40 Medium691.20.8680
Windward/Leeward 60-40 Med/High644.10.9316
Windward/Leeward 60-40 High623.20.9628
5-Band AP Low755.40.7942
5-Band AP Low/Med620.20.9674
5-Band AP Medium559.41.0725
5-Band AP Med/High522.61.1482
5-Band AP High500.11.1998
5-Band SF Bay Tour - Low878.70.6828
5-Band SF Bay Tour - Low/Med739.70.8111
5-Band SF Bay Tour - Medium655.90.9148
5-Band SF Bay Tour - Med/High608.40.9862
5-Band SF Bay Tour - High583.01.0291
Chicago-Mac Upwind0.9298
Chicago-Mac All Purpose0.9570
Chicago-Mac Downwind0.9782
Bayview-Mac Cove Island0.7290
Bayview-Mac Shore0.7357
Harvest Moon Regatta495.41.2112
Double HandedClub 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 L8.471LSM08.302Acc. length9.500Sink (kg/mm) 13.91
VCGD-0.054VCGM-0.056RM Rated (kg·m) 69.6Limit of positive stability(°) N/AStability IndexN/ADefault crew weight170Declared 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
Double HandedClub 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