Club
Certificate
2023

Boat

IRUKANDJI

USA 50959

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Rated boat velocities in knots
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat Angles40.6°36.9°35.2°35.0°35.0°35.0°35.0°
Beat VMG4.234.845.105.245.335.395.42
52°6.206.747.027.217.367.477.60
60°6.406.937.267.497.667.818.00
75°6.527.097.577.918.188.408.76
90°6.447.067.658.208.679.069.67
110°6.267.087.688.168.639.3210.78
120°6.157.077.858.549.159.7711.01
135°5.566.707.588.539.6210.7612.82
150°4.705.886.717.548.449.6012.89
Run VMG4.075.095.816.537.318.3211.16
Gybe Angles143.9°148.0°151.6°149.2°146.0°145.1°147.0°

APH: 514.0

CDL: 8.749

GPH: 570.4

CertNo: US5095

BOAT
ClassViper 830DesignerThompsonBuilderViper RaceboatsAge date01/1997Series date01/1996Offset fileViper830_JT.offData fileUSA 50959
HULL
Length Overall8.298 mMaximum Beam2.560 mDraft2.176 mDisplacement1,344 kgDLR3.0432IMS DivisionSportboatDynamic Allowance0.000%Age Allowance0.487%
PROPELLER
InstallationNo PropellerTypeN/ADiameterN/A
CREW
Maximum weight467 kgMinimum weight350 kg * when appliedNon Manual PowerCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail27.9028.61Headsail Luffed27.4827.48Headsail FlyingSymmetricAsymmetric91.3491.34 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail7.83Storm Jib5.92Heavy Weather Jib15.99
SAIL LIMITS
Headsails5  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.
ORC Ref  04560002SQIIssued on 02/10/2023Valid until 19/02/2024
VPP ver: 2023 1.03 | © ORC | www.orc.org

Club
Certificate
2023

Boat

IRUKANDJI

USA 50959

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Time Allowances in secs/NM
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat VMG851.1744.4705.9686.8675.2667.8664.7
52°580.4533.9513.1499.2489.3481.7473.5
60°562.6519.6495.6480.4469.7461.1450.2
75°552.5507.8475.3455.3440.3428.7411.1
90°558.7510.1470.4438.8415.4397.5372.3
110°575.4508.5468.6441.2417.1386.4333.9
120°584.9509.2458.6421.4393.3368.6327.1
135°647.8537.6475.2422.1374.2334.4280.8
150°765.2612.2536.5477.1426.3374.9279.3
Run VMG883.6706.9619.4551.0492.3432.9322.5
Selected Courses
Windward / Leeward867.3725.7662.6618.9583.8550.3493.6
All purpose678.1586.0539.3505.8478.8454.1414.8
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward630.60.9515
All purpose514.01.1672
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low632.00.9493
Triple Number Coastal/Long Distance Medium516.91.1607
Triple Number Coastal/Long Distance High445.61.3466
Triple Number Windward/Leeward Low796.50.7533
Triple Number Windward/Leeward Medium633.60.9470
Triple Number Windward/Leeward High537.41.1165
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance556.41.0784
Triple Number Coastal/Long Distance Low632.00.9493
Triple Number Coastal/Long Distance Medium516.91.1607
Triple Number Coastal/Long Distance High445.61.3466
Triple Number Windward/Leeward Low796.50.7533
Triple Number Windward/Leeward Medium633.60.9470
Triple Number Windward/Leeward High537.41.1165
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance868.9688.1601.7539.4497.2458.6395.4
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.8407
Downwind "popa"1.0478
70% up, 30% down "Ilhabela"0.8937
30% up, 70% down "Ilhabela-inverso"0.9757
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low632.00.9493
Triple Number Coastal/Long Distance Medium516.91.1607
Triple Number Coastal/Long Distance High445.61.3466
Triple Number Windward/Leeward Low796.50.7533
Triple Number Windward/Leeward Medium633.60.9470
Triple Number Windward/Leeward High537.41.1165
Predominantly Upwind560.81.0698
Predominantly Downwind511.41.1733
Custom scoring options for Canada
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low632.00.9493
Triple Number All Purpose Medium516.91.1607
Triple Number All Purpose High445.61.3466
Triple Number Windward/Leeward Low796.50.7533
Triple Number Windward/Leeward Medium633.60.9470
Triple Number Windward/Leeward High537.41.1165
Predominantly Upwind560.81.0698
Predominantly Downwind511.41.1733
Predominantly Upwind Low689.00.8708
Predominantly Upwind Medium586.71.0226
Predominantly Upwind High551.81.0873
Predominantly Downwind Low693.30.8654
Predominantly Downwind Medium513.01.1696
Predominantly Downwind High388.11.5459
Chicago-Mac Upwind1.0536
Chicago-Mac All Purpose1.0987
Chicago-Mac Downwind1.1491
Bayview-Mac Cove Island1.0357
Bayview-Mac Shore1.0430
Scoring OptionTime On
Distance		Time On
Time
Predominantly Reaching484.21.2392
Predominantly Reaching Low581.61.0317
Predominantly Reaching Medium484.41.2386
Predominantly Reaching High404.91.4817
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low856.40.7006
5-Band Low / Medium743.40.8071
5-Band Medium623.50.9623
5-Band Medium / High552.21.0865
5-Band High503.41.1918
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance556.41.0784
Triple Number Coastal/Long Distance Low632.00.9493
Triple Number Coastal/Long Distance Medium516.91.1607
Triple Number Coastal/Long Distance High445.61.3466
Triple Number Windward/Leeward Low796.50.7533
Triple Number Windward/Leeward Medium633.60.9470
Triple Number Windward/Leeward High537.41.1165
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance868.9688.1601.7539.4497.2458.6395.4
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance556.41.0784
Triple Number Coastal/Long Distance Low632.00.9493
Triple Number Coastal/Long Distance Medium516.91.1607
Triple Number Coastal/Long Distance High445.61.3466
Triple Number Windward/Leeward Low796.50.7533
Triple Number Windward/Leeward Medium633.60.9470
Triple Number Windward/Leeward High537.41.1165
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance868.9688.1601.7539.4497.2458.6395.4
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance556.4
Triple Number Coastal/Long Distance Low632.0
Triple Number Coastal/Long Distance Medium516.9
Triple Number Coastal/Long Distance High445.6
Triple Number Windward/Leeward Low796.5
Triple Number Windward/Leeward Medium633.6
Triple Number Windward/Leeward High537.4
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance868.9688.1601.7539.4497.2458.6395.4
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance556.41.0784
Triple Number Coastal/Long Distance Low632.00.9493
Triple Number Coastal/Long Distance Medium516.91.1607
Triple Number Coastal/Long Distance High445.61.3466
Triple Number Windward/Leeward Low796.50.7533
Triple Number Windward/Leeward Medium633.60.9470
Triple Number Windward/Leeward High537.41.1165
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance868.9688.1601.7539.4497.2458.6395.4
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating (Coastal/Long Distance)556.41.0784
Triple Number Coastal/Long Distance Low632.00.9493
Triple Number Coastal/Long Distance Medium516.91.1607
Triple Number Coastal/Long Distance High445.61.3466
Triple Number Windward/Leeward Low796.50.7533
Triple Number Windward/Leeward Medium633.60.9470
Triple Number Windward/Leeward High537.41.1165
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance868.9688.1601.7539.4497.2458.6395.4
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low632.00.9493
Triple Number Coastal/Long Distance Medium516.91.1607
Triple Number Coastal/Long Distance High445.61.3466
Triple Number Windward/Leeward Low796.50.7533
Triple Number Windward/Leeward Medium633.60.9470
Triple Number Windward/Leeward High537.41.1165
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9493
Triple Number Coastal/Long Distance Medium1.1607
Triple Number Coastal/Long Distance High1.3466
Triple Number Windward/Leeward Low0.7533
Triple Number Windward/Leeward Medium0.9470
Triple Number Windward/Leeward High1.1165
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance868.9688.1601.7539.4497.2458.6395.4
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance556.41.0784
Triple Number Coastal/Long Distance Low632.00.9493
Triple Number Coastal/Long Distance Medium516.91.1607
Triple Number Coastal/Long Distance High445.61.3466
Triple Number Windward/Leeward Low796.50.7533
Triple Number Windward/Leeward Medium633.60.9470
Triple Number Windward/Leeward High537.41.1165
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance868.9688.1601.7539.4497.2458.6395.4
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low632.00.9493
Triple Number Coastal/Long Distance Medium516.91.1607
Triple Number Coastal/Long Distance High445.61.3466
Triple Number Windward/Leeward Low796.50.7533
Triple Number Windward/Leeward Medium633.60.9470
Triple Number Windward/Leeward High537.41.1165
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance556.41.0784
Triple Number Coastal/Long Distance Low632.00.9493
Triple Number Coastal/Long Distance Medium516.91.1607
Triple Number Coastal/Long Distance High445.61.3466
Triple Number Windward/Leeward Low796.50.7533
Triple Number Windward/Leeward Medium633.60.9470
Triple Number Windward/Leeward High537.41.1165
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance868.9688.1601.7539.4497.2458.6395.4
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Triple Number Windward/Leeward Low796.50.7533
Triple Number Windward/Leeward Medium633.60.9470
Triple Number Windward/Leeward High537.41.1165
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance868.9688.1601.7539.4497.2458.6395.4
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low632.0
Triple Number Coastal/Long Distance Medium516.9
Triple Number Coastal/Long Distance High445.6
Triple Number Windward/Leeward Low796.5
Triple Number Windward/Leeward Medium633.6
Triple Number Windward/Leeward High537.4
Predominantly Upwind560.8
Predominantly Downwind511.4
Predominantly Reaching492.4
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance556.41.0784
Triple Number Coastal/Long Distance Low632.00.9493
Triple Number Coastal/Long Distance Medium516.91.1607
Triple Number Coastal/Long Distance High445.61.3466
Triple Number Windward/Leeward Low796.50.7533
Triple Number Windward/Leeward Medium633.60.9470
Triple Number Windward/Leeward High537.41.1165
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance868.9688.1601.7539.4497.2458.6395.4
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9493
Triple Number Coastal/Long Distance Medium1.1607
Triple Number Coastal/Long Distance High1.3466
Triple Number Windward/Leeward Low0.7533
Triple Number Windward/Leeward Medium0.9470
Triple Number Windward/Leeward High1.1165
Coastal/Long Distance1.0784
Predominantly Upwind1.0698
Predominantly Downwind1.1733
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.9493
Tretall Distanseseilas Mellomvind1.1607
Tretall Distanseseilas Mye vind1.3466
Tretall Pølsebane Lite vind0.7533
Tretall Pølsebane Mellomvind0.9470
Tretall Pølsebane Mye vind1.1165
Distanseseilas ett tall (OSN 8-16kn)1.0784
Distanseseilas ett tall (APH 6-20kn)1.1672
Enkeltall Motvind1.0698
Enkeltall Medvind1.1733
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low632.00.9493
Triple Number Coastal/Long Distance Medium516.91.1607
Triple Number Coastal/Long Distance High445.61.3466
Triple Number Windward/Leeward Low796.50.7533
Triple Number Windward/Leeward Medium633.60.9470
Triple Number Windward/Leeward High537.41.1165
Coastal/Long Distance556.41.0784
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind560.81.0698
Predominantly Downwind511.41.1733
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore510.61.1750
Cape Doctor Coastal426.61.4064
Triple Number Coastal/Long Distance Low632.00.9493
Triple Number Coastal/Long Distance Medium516.91.1607
Triple Number Coastal/Long Distance High445.61.3466
Triple Number Windward/Leeward Low796.50.7533
Triple Number Windward/Leeward Medium633.60.9470
Triple Number Windward/Leeward High537.41.1165
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9493
Triple Number Coastal/Long Distance Medium1.1607
Triple Number Coastal/Long Distance High1.3466
Triple Number Windward/Leeward Low0.7533
Triple Number Windward/Leeward Medium0.9470
Triple Number Windward/Leeward High1.1165
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9493
Triple Number Coastal/Long Distance Medium1.1607
Triple Number Coastal/Long Distance High1.3466
Triple Number Windward/Leeward Low0.7533
Triple Number Windward/Leeward Medium0.9470
Triple Number Windward/Leeward High1.1165
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance556.41.0784
Triple Number Coastal/Long Distance Low632.00.9493
Triple Number Coastal/Long Distance Medium516.91.1607
Triple Number Coastal/Long Distance High445.61.3466
Triple Number Windward/Leeward Low796.50.7533
Triple Number Windward/Leeward Medium633.60.9470
Triple Number Windward/Leeward High537.41.1165
Predominantly Upwind560.81.0698
Predominantly Downwind511.41.1733
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance868.9688.1601.7539.4497.2458.6395.4
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance556.41.0784
Triple Number Coastal/Long Distance Low632.00.9493
Triple Number Coastal/Long Distance Medium516.91.1607
Triple Number Coastal/Long Distance High445.61.3466
Triple Number Windward/Leeward Low796.50.7533
Triple Number Windward/Leeward Medium633.60.9470
Triple Number Windward/Leeward High537.41.1165
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance868.9688.1601.7539.4497.2458.6395.4
Custom scoring options for United States of America
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low632.00.9493
Triple Number All Purpose Medium516.91.1607
Triple Number All Purpose High445.61.3466
Triple Number Windward/Leeward Low796.50.7533
Triple Number Windward/Leeward Medium633.60.9470
Triple Number Windward/Leeward High537.41.1165
Predominantly Upwind560.81.0698
Predominantly Downwind511.41.1733
Predominantly Upwind Low689.00.8708
Predominantly Upwind Medium586.71.0226
Predominantly Upwind High551.81.0873
Predominantly Downwind Low693.30.8654
Predominantly Downwind Medium513.01.1696
Predominantly Downwind High388.11.5459
Chicago-Mac Upwind1.0536
Chicago-Mac All Purpose1.0987
Chicago-Mac Downwind1.1491
Bayview-Mac Cove Island1.0357
Bayview-Mac Shore1.0430
Harvest Moon Regatta431.81.3895
Scoring OptionTime On
Distance		Time On
Time
San Francisco Bay Heavy525.61.1416
San Francisco Bay Medium616.30.9736
Predominantly Reaching484.21.2392
Predominantly Reaching Low581.61.0317
Predominantly Reaching Medium484.41.2386
Predominantly Reaching High404.91.4817
Windward/Leeward 60-40 Low796.70.7531
Windward/Leeward 60-40 Medium654.50.9167
Windward/Leeward 60-40 High582.01.0309
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low856.40.7006
5-Band Low / Medium743.40.8071
5-Band Medium623.50.9623
5-Band Medium / High552.21.0865
5-Band High503.41.1918
ORC Ref  04560002SQIIssued on 02/10/2023Valid until 19/02/2024
VPP ver: 2023 1.03 | © ORC | www.orc.org

Club
Certificate
2023

Boat

IRUKANDJI

USA 50959

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassViper 830MeasurementHINPlan reviewHull constructionCoredCarbon RudderNoLight stanchionsNoTrim tabNo
LOA8.298Max. Beam2.560Draft2.176Displacement1,344Wetted area12.28IMS L8.043LSM07.615Acc. length8.298Sink (kg/mm) 9.17
VCGD-0.610VCGM-0.609RM Rated (kg·m) 35.6Limit of positive stability(°) N/AStability IndexN/A
PROPELLER
Propeller TypeNo Propeller
Hydro generatorNo
PIPA0.0000
RIG
Forestay tensionAftInner stayNone FittedCarbon mastYesHeadsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoRunners/Checkstays1Spreaders2Rotating mastNo
P10.910IG10.880ISP11.918MDT10.076MDL10.105MDT2MDL2TLTaperMWGO
E4.100J3.109BAS1.000FSD0.028SFJ0.000SPLWPLTPS5.274BD0.153MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date01/01/2013MeasurerComment
SFFP0.300FFMFF0.729LCFcl4.582SG
SAFP8.258FAMFA0.541LCFsh4.748HBI0.662
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  04560002SQIIssued on 02/10/2023Valid until 19/02/2024
VPP ver: 2023 1.03 | © ORC | www.orc.org

Club
Certificate
2023

Boat

IRUKANDJI

USA 50959

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentmn0.761.191.752.653.4327.9016/01/20201477-1
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment04.8211.20NoNo 27.48
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateCommentA213.7211.6712.708.539.0594%91.3421/01/2020758
ORC Ref  04560002SQIIssued on 02/10/2023Valid until 19/02/2024
VPP ver: 2023 1.03 | © ORC | www.orc.org