Double HandedClub Certificate2025
SOUTHBOUNDUSA 423
US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
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 Angles43.0°43.0°41.0°39.6°38.5°38.0°37.8°38.5°39.3°
Beat VMG2.453.434.214.714.965.085.155.195.09
52°3.825.226.246.807.057.177.257.327.31
60°4.085.506.497.017.257.397.487.577.58
75°4.275.716.667.177.477.697.858.038.11
90°4.255.776.837.277.537.848.118.508.72
110°4.365.927.027.608.058.378.659.199.57
120°4.225.796.947.578.108.629.099.8710.70
135°3.715.226.467.247.808.389.0210.7613.04
150°3.074.395.566.557.237.728.229.4412.28
Run VMG2.663.804.825.676.296.737.148.1710.63
Gybe Angles142.6°142.6°146.5°150.1°152.6°155.2°153.8°145.8°143.6°
APH ToD:548.9CDL: 8.993APH ToT: 1.0931CertNo:US6910
BOAT
ClassJ 105DesignerJOHNSTONEBuilderTILLOTSON-PEARSONAge date07/2001Series date07/1991Offset fileJ105.offData fileUS423
HULL
Length Overall10.570 mMaximum Beam3.344 mDraft2.002 mDisplacement3,899 kgDLR4.4935IMS DivisionPerformanceDynamic Allowance0.180%Age Allowance0.487%
PROPELLER
InstallationShaft exposedTypeFolding 2 bladesDiameter0.381m
CREW
Maximum weight152 kg(declared)Minimum weight120 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension0.00 m
SAIL AREAS (m²)
MeasuredRatedMainsail33.7134.42Headsail Luffed24.9624.96Headsail FlyingSymmetricAsymmetric89.4489.44 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail9.86Storm Jib7.72Heavy Weather Jib20.83
SAIL LIMITS
Headsails5
✱ One set on the forestay
Spinnakers4
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
SOUTHBOUNDUSA 423
US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
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 VMG1466.81050.0854.9763.9725.9708.9699.7693.2707.8
52°941.9689.8576.7529.1510.5502.1496.8491.5492.5
60°882.4654.2554.5513.8496.3487.3481.6475.3474.8
75°842.9631.0540.3502.3481.9468.0458.8448.2443.9
90°846.6623.6527.4495.0478.3459.0443.9423.6413.0
110°825.7608.0512.6473.7446.9430.1416.1391.6376.2
120°852.3621.3518.4475.8444.3417.8396.0364.9336.5
135°971.5689.2557.3497.1461.3429.8399.3334.6276.2
150°1172.7820.3647.3549.9498.2466.3437.9381.5293.2
Run VMG1354.7947.2747.4634.9572.7535.2504.1440.5338.6
Selected Courses
Windward / Leeward1410.6998.6801.2699.4649.3622.1601.9566.9523.2
All purpose1069.2769.4630.3565.0531.7510.6494.4466.9440.7
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward677.70.8854
All purpose548.91.0931
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low699.90.8573
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High488.11.2292
Triple Number Windward/Leeward Low899.80.6668
Triple Number Windward/Leeward Medium671.80.8931
Triple Number Windward/Leeward High593.81.0104
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance596.51.0058
Triple Number Coastal/Long Distance Low699.90.8573
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High488.11.2292
Triple Number Windward/Leeward Low899.80.6668
Triple Number Windward/Leeward Medium671.80.8931
Triple Number Windward/Leeward High593.81.0104
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1490.0993.5753.3633.0567.3529.8498.1446.3419.4
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7641
Downwind "popa"0.9584
70% up, 30% down "Ilhabela"0.8136
30% up, 70% down "Ilhabela-inverso"0.8905
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low699.90.8573
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High488.11.2292
Triple Number Windward/Leeward Low899.80.6668
Triple Number Windward/Leeward Medium671.80.8931
Triple Number Windward/Leeward High593.81.0104
Predominantly Upwind599.21.0013
Predominantly Downwind550.21.0906
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low699.90.8573
Triple Number AP Medium545.81.0993
Triple Number AP High488.11.2292
Triple Number Windward/Leeward Low940.80.6378
Triple Number Windward/Leeward Medium671.80.8931
Triple Number Windward/Leeward High593.81.0104
Single Number Predominant Upwind624.20.9613
Single Number Predominant Reaching543.71.1036
Single Number Predominant Downwind572.31.0484
Predominant Upwind - Low858.30.6991
Predominant Upwind - Low/Med654.00.9174
Predominant Upwind - Medium581.51.0318
Predominant Upwind - Med/High545.21.1006
Predominant Upwind - High525.91.1409
Predominant Downwind Low833.30.7201
Predominant Downwind Low/Med619.10.9692
Predominant Downwind Medium533.11.1255
Predominant Downwind Med/High474.81.2636
Predominant Downwind High426.71.4061
Predominant Reaching Low751.30.7986
Predominant Reaching Low/Med575.81.0420
Predominant Reaching Medium511.01.1742
Predominant Reaching Med/High467.31.2840
Predominant Reaching High434.71.3802
SA/DSPL Upwind23.58SA/DSPL Downwind49.49
Scoring OptionTODTOT
5-Band Windward/Leeward Low1052.30.5702
5-Band Windward/Leeward Low/Med771.90.7773
5-Band Windward/Leeward Medium661.70.9067
5-Band Windward/Leeward Med/High603.40.9944
5-Band Windward/Leeward High565.41.0613
Windward/Leeward 60-40 Low1062.90.5645
Windward/Leeward 60-40 Low/Med784.10.7653
Windward/Leeward 60-40 Medium676.90.8863
Windward/Leeward 60-40 Med/High623.20.9628
Windward/Leeward 60-40 High591.71.0141
5-Band AP Low771.60.7776
5-Band AP Low/Med613.20.9785
5-Band AP Medium538.81.1137
5-Band AP Med/High495.61.2107
5-Band AP High467.11.2845
5-Band SF Bay Tour - Low907.50.6611
5-Band SF Bay Tour - Low/Med739.10.8118
5-Band SF Bay Tour - Medium638.00.9404
5-Band SF Bay Tour - Med/High583.91.0275
5-Band SF Bay Tour - High549.41.0921
Chicago-Mac Upwind0.9334
Chicago-Mac All Purpose0.9732
Chicago-Mac Downwind1.0102
Bayview-Mac Cove Island0.7130
Bayview-Mac Shore0.7173
Harvest Moon Regatta472.61.2697
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance596.51.0058
Triple Number Coastal/Long Distance Low699.90.8573
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High488.11.2292
Triple Number Windward/Leeward Low899.80.6668
Triple Number Windward/Leeward Medium671.80.8931
Triple Number Windward/Leeward High593.81.0104
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1490.0993.5753.3633.0567.3529.8498.1446.3419.4
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance596.51.0058
Triple Number Coastal/Long Distance Low699.90.8573
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High488.11.2292
Triple Number Windward/Leeward Low899.80.6668
Triple Number Windward/Leeward Medium671.80.8931
Triple Number Windward/Leeward High593.81.0104
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1490.0993.5753.3633.0567.3529.8498.1446.3419.4
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance596.5
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1490.0993.5753.3633.0567.3529.8498.1446.3419.4
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low699.90.8573
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High488.11.2292
Triple Number Windward/Leeward Low899.80.6668
Triple Number Windward/Leeward Medium671.80.8931
Triple Number Windward/Leeward High593.81.0104
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating596.51.0058
FinRating, kevyt tuuli1032.50.9685
FinRating, kova tuuli467.71.0691
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low699.90.8573
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High488.11.2292
Triple Number Windward/Leeward Low899.80.6668
Triple Number Windward/Leeward Medium671.80.8931
Triple Number Windward/Leeward High593.81.0104
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance1.0058
Triple Number Coastal/Long Distance Low0.8573
Triple Number Coastal/Long Distance Medium1.0994
Triple Number Coastal/Long Distance High1.2292
Triple Number Windward/Leeward Low0.6668
Triple Number Windward/Leeward Medium0.8931
Triple Number Windward/Leeward High1.0104
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1490.0993.5753.3633.0567.3529.8498.1446.3419.4
For information
General Purpose Handicap (GPH)615.1
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance596.51.0058
Triple Number Coastal/Long Distance Low699.90.8573
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High488.11.2292
Triple Number Windward/Leeward Low899.80.6668
Triple Number Windward/Leeward Medium671.80.8931
Triple Number Windward/Leeward High593.81.0104
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1490.0993.5753.3633.0567.3529.8498.1446.3419.4
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low699.90.8573
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High488.11.2292
Triple Number Windward/Leeward Low899.80.6668
Triple Number Windward/Leeward Medium671.80.8931
Triple Number Windward/Leeward High593.81.0104
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance596.51.0058
Triple Number Coastal/Long Distance Low699.90.8573
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High488.11.2292
Triple Number Windward/Leeward Low899.80.6668
Triple Number Windward/Leeward Medium671.80.8931
Triple Number Windward/Leeward High593.81.0104
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1490.0993.5753.3633.0567.3529.8498.1446.3419.4
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance596.51.0058
Triple Number Coastal/Long Distance Low699.90.8573
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High488.11.2292
Triple Number Windward/Leeward Low899.80.6668
Triple Number Windward/Leeward Medium671.80.8931
Triple Number Windward/Leeward High593.81.0104
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1490.0993.5753.3633.0567.3529.8498.1446.3419.4
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low699.9
Triple Number Coastal/Long Distance Medium545.8
Triple Number Coastal/Long Distance High488.1
Triple Number Windward/Leeward Low899.8
Triple Number Windward/Leeward Medium671.8
Triple Number Windward/Leeward High593.8
Predominantly Upwind599.2
Predominantly Downwind550.2
Predominantly Reaching530.1
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance596.51.0058
Triple Number Coastal/Long Distance Low699.90.8573
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High488.11.2292
Triple Number Windward/Leeward Low899.80.6668
Triple Number Windward/Leeward Medium671.80.8931
Triple Number Windward/Leeward High593.81.0104
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1490.0993.5753.3633.0567.3529.8498.1446.3419.4
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8573
Triple Number Coastal/Long Distance Medium1.0994
Triple Number Coastal/Long Distance High1.2292
Triple Number Windward/Leeward Low0.6668
Triple Number Windward/Leeward Medium0.8931
Triple Number Windward/Leeward High1.0104
Coastal/Long Distance1.0058
Predominantly Upwind1.0013
Predominantly Downwind1.0906
For information
General Purpose Handicap (GPH)615.1
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0931
Distanseseilas Trippeltall svak vind0.8573
Distanseseilas Trippeltall mellomvind1.0994
Distanseseilas Trippeltall sterk vind1.2292
Pølsebane Trippeltall svak vind0.6668
Pølsebane Trippeltall mellomvind0.8931
Pølsebane Trippeltall sterk vind1.0104
Motvind Singeltall1.0013
Medvind Singeltall1.0906
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low699.90.8573
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High488.11.2292
Triple Number Windward/Leeward Low899.80.6668
Triple Number Windward/Leeward Medium671.80.8931
Triple Number Windward/Leeward High593.81.0104
Coastal/Long Distance596.51.0058
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind599.21.0013
Predominantly Downwind550.21.0906
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore536.31.1188
Cape Doctor Coastal448.51.3376
Triple Number Coastal/Long Distance Low699.90.8573
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High488.11.2292
Triple Number Windward/Leeward Low899.80.6668
Triple Number Windward/Leeward Medium671.80.8931
Triple Number Windward/Leeward High593.81.0104
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8573
Triple Number Coastal/Long Distance Medium1.0994
Triple Number Coastal/Long Distance High1.2292
Triple Number Windward/Leeward Low0.6668
Triple Number Windward/Leeward Medium0.8931
Triple Number Windward/Leeward High1.0104
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8573
Triple Number Coastal/Long Distance Medium1.0994
Triple Number Coastal/Long Distance High1.2292
Triple Number Windward/Leeward Low0.6668
Triple Number Windward/Leeward Medium0.8931
Triple Number Windward/Leeward High1.0104
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance596.51.0058
Triple Number Coastal/Long Distance Low699.90.8573
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High488.11.2292
Triple Number Windward/Leeward Low899.80.6668
Triple Number Windward/Leeward Medium671.80.8931
Triple Number Windward/Leeward High593.81.0104
Predominantly Upwind599.21.0013
Predominantly Downwind550.21.0906
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1490.0993.5753.3633.0567.3529.8498.1446.3419.4
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance596.51.0058
Triple Number Coastal/Long Distance Low699.90.8573
Triple Number Coastal/Long Distance Medium545.81.0994
Triple Number Coastal/Long Distance High488.11.2292
Triple Number Windward/Leeward Low899.80.6668
Triple Number Windward/Leeward Medium671.80.8931
Triple Number Windward/Leeward High593.81.0104
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1490.0993.5753.3633.0567.3529.8498.1446.3419.4
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low699.90.8573
Triple Number AP Medium545.81.0993
Triple Number AP High488.11.2292
Triple Number Windward/Leeward Low940.80.6378
Triple Number Windward/Leeward Medium671.80.8931
Triple Number Windward/Leeward High593.81.0104
Single Number Predominant Upwind624.20.9613
Single Number Predominant Reaching543.71.1036
Single Number Predominant Downwind572.31.0484
Predominant Upwind - Low858.30.6991
Predominant Upwind - Low/Med654.00.9174
Predominant Upwind - Medium581.51.0318
Predominant Upwind - Med/High545.21.1006
Predominant Upwind - High525.91.1409
Predominant Downwind Low833.30.7201
Predominant Downwind Low/Med619.10.9692
Predominant Downwind Medium533.11.1255
Predominant Downwind Med/High474.81.2636
Predominant Downwind High426.71.4061
Predominant Reaching Low751.30.7986
Predominant Reaching Low/Med575.81.0420
Predominant Reaching Medium511.01.1742
Predominant Reaching Med/High467.31.2840
Predominant Reaching High434.71.3802
SA/DSPL Upwind23.58SA/DSPL Downwind49.49
Scoring OptionTODTOT
5-Band Windward/Leeward Low1052.30.5702
5-Band Windward/Leeward Low/Med771.90.7773
5-Band Windward/Leeward Medium661.70.9067
5-Band Windward/Leeward Med/High603.40.9944
5-Band Windward/Leeward High565.41.0613
Windward/Leeward 60-40 Low1062.90.5645
Windward/Leeward 60-40 Low/Med784.10.7653
Windward/Leeward 60-40 Medium676.90.8863
Windward/Leeward 60-40 Med/High623.20.9628
Windward/Leeward 60-40 High591.71.0141
5-Band AP Low771.60.7776
5-Band AP Low/Med613.20.9785
5-Band AP Medium538.81.1137
5-Band AP Med/High495.61.2107
5-Band AP High467.11.2845
5-Band SF Bay Tour - Low907.50.6611
5-Band SF Bay Tour - Low/Med739.10.8118
5-Band SF Bay Tour - Medium638.00.9404
5-Band SF Bay Tour - Med/High583.91.0275
5-Band SF Bay Tour - High549.41.0921
Chicago-Mac Upwind0.9334
Chicago-Mac All Purpose0.9732
Chicago-Mac Downwind1.0102
Bayview-Mac Cove Island0.7130
Bayview-Mac Shore0.7173
Harvest Moon Regatta472.61.2697
Double HandedClub Certificate2025
SOUTHBOUNDUSA 423
US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassJ 105Measurement01/01/2020HINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA10.570Max. Beam3.344Draft2.002Displacement3,899Wetted area22.98IMS L9.523LSM09.537Acc. length10.570Sink (kg/mm) 17.31
VCGD-0.124VCGM-0.139RM Rated (kg·m) 103.5Limit of positive stability(°) N/AStability IndexN/ADefault crew weight170Declared crew weight152
PROPELLER
Propeller TypeFolding 2 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.381PBW0.098PIPA0.0031
PSD0.025PHD0.049PHL0.138
PSA16.5°ESL0.915
ST10.019ST20.092ST30.092
ST40.046ST50.186
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders2Rotating mastNo
P12.650IG12.300ISP12.827MDT10.101MDL10.165MDT20.101MDL20.101TL1.899MW0.165GO0.205
E4.450J4.131BAS1.552FSD0.029SFJ0.000SPL0.000WPLTPS5.900BD0.129MWT0.00MCG0.000
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM entered directlyRM entered103.5Flotation Date01/01/2020
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Double HandedClub Certificate2025
SOUTHBOUNDUSA 423
US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentQ-Class Main0.160.931.682.893.7833.7117/02/2022Sail ID: 167631
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentQ-Class Jib0.080.561.042.023.074.1512.10NoNo 24.9617/05/2022Sail ID: 167632
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateCommentQ-A215.1312.0913.617.967.59105%89.4417/02/2022Sail ID: 167633