International
Certificate
2023

Boat

FEATHER

USA 23

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 Angles43.6°41.2°39.4°38.1°37.5°37.2°37.6°
Beat VMG3.414.224.775.045.155.215.24
52°5.226.256.837.097.207.277.33
60°5.506.497.017.277.417.497.58
75°5.656.647.147.467.707.878.06
90°5.796.817.197.507.838.138.58
110°5.906.997.547.938.238.519.07
120°5.756.917.538.068.548.989.78
135°5.126.427.227.798.409.1010.88
150°4.325.506.507.177.587.999.48
Run VMG3.744.765.636.216.576.978.21
Gybe Angles143.3°146.9°148.7°150.3°148.4°173.0°142.6°

APH: 549.5

CDL: 9.089

GPH: 616.5

CertNo: USA23

BOAT
ClassJ 100DesignerJohnstoneBuilderJ BoatsAge date05/2005Series date01/2005Offset fileJ-100-USA23.offData fileUSA23J100
HULL
Length Overall10.062 mMaximum Beam2.810 mDraft1.751 mDisplacement3,093 kgDLR4.0352IMS DivisionPerformanceDynamic Allowance0.000%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.405m
CREW
Maximum weight575 kgMinimum weight431 kg * when appliedNon Manual PowerNoCrew Arm Extension0.00 m
SAIL AREAS (m²)
MeasuredRatedMainsail28.2828.87Headsail Luffed21.2621.26Headsail FlyingSymmetricAsymmetric88.6888.68 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail8.35Storm Jib6.89Heavy Weather Jib18.61
SAIL LIMITS
Headsails5  Spinnakers4
STABILITY
Righting Moment60.2 kg·mStability Index114.7
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  04560002S9RIssued on 11/09/2023Valid until 19/02/2024
VPP ver: 2023 1.03 | © ORC | www.orc.org

International
Certificate
2023

Boat

FEATHER

USA 23

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 VMG1055.3853.9754.1714.6698.7690.6687.3
52°690.1575.6526.7507.9500.1495.3491.1
60°655.1554.4513.9495.3486.1480.3474.6
75°636.7541.9504.4482.7467.3457.5446.4
90°622.0528.8500.7480.1459.6442.7419.7
110°609.9514.8477.7453.8437.5422.9396.9
120°626.6520.7478.3446.9421.3401.1368.1
135°703.1561.0498.8462.0428.5395.6330.9
150°833.5654.7554.2502.4474.8450.7379.6
Run VMG962.5756.0639.9580.1548.3516.5438.3
Selected Courses
Windward / Leeward1008.9804.9697.0647.3623.5603.5562.8
All purpose775.7632.6565.0531.3511.2495.2465.0
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward677.70.8853
All purpose549.51.0920
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low704.10.8521
Triple Number Coastal/Long Distance Medium546.01.0990
Triple Number Coastal/Long Distance High487.91.2298
Triple Number Windward/Leeward Low906.90.6616
Triple Number Windward/Leeward Medium671.10.8941
Triple Number Windward/Leeward High593.21.0114
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance597.31.0046
Triple Number Coastal/Long Distance Low704.10.8521
Triple Number Coastal/Long Distance Medium546.01.0990
Triple Number Coastal/Long Distance High487.91.2298
Triple Number Windward/Leeward Low906.90.6616
Triple Number Windward/Leeward Medium671.10.8941
Triple Number Windward/Leeward High593.21.0114
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.2756.9632.1566.1530.7500.1445.2
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7700
Downwind "popa"0.9456
70% up, 30% down "Ilhabela"0.8154
30% up, 70% down "Ilhabela-inverso"0.8851
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low704.10.8521
Triple Number Coastal/Long Distance Medium546.01.0990
Triple Number Coastal/Long Distance High487.91.2298
Triple Number Windward/Leeward Low906.90.6616
Triple Number Windward/Leeward Medium671.10.8941
Triple Number Windward/Leeward High593.21.0114
Predominantly Upwind597.11.0049
Predominantly Downwind552.51.0859
Custom scoring options for Canada
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low704.10.8521
Triple Number All Purpose Medium546.01.0990
Triple Number All Purpose High487.91.2298
Triple Number Windward/Leeward Low906.90.6616
Triple Number Windward/Leeward Medium671.10.8941
Triple Number Windward/Leeward High593.21.0114
Predominantly Upwind597.11.0049
Predominantly Downwind552.51.0859
Predominantly Upwind Low792.30.7573
Predominantly Upwind Medium617.90.9710
Predominantly Upwind High578.01.0380
Predominantly Downwind Low759.30.7902
Predominantly Downwind Medium548.11.0947
Predominantly Downwind High456.01.3159
Chicago-Mac Upwind0.9874
Chicago-Mac All Purpose1.0235
Chicago-Mac Downwind1.0679
Bayview-Mac Cove Island0.9488
Bayview-Mac Shore0.9549
Scoring OptionTime On
Distance		Time On
Time
Predominantly Reaching520.41.1530
Predominantly Reaching Low634.00.9464
Predominantly Reaching Medium515.61.1638
Predominantly Reaching High448.61.3374
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low993.20.6041
5-Band Low / Medium826.90.7256
5-Band Medium661.00.9077
5-Band Medium / High603.70.9939
5-Band High569.91.0529
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance597.31.0046
Triple Number Coastal/Long Distance Low704.10.8521
Triple Number Coastal/Long Distance Medium546.01.0990
Triple Number Coastal/Long Distance High487.91.2298
Triple Number Windward/Leeward Low906.90.6616
Triple Number Windward/Leeward Medium671.10.8941
Triple Number Windward/Leeward High593.21.0114
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.2756.9632.1566.1530.7500.1445.2
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance597.31.0046
Triple Number Coastal/Long Distance Low704.10.8521
Triple Number Coastal/Long Distance Medium546.01.0990
Triple Number Coastal/Long Distance High487.91.2298
Triple Number Windward/Leeward Low906.90.6616
Triple Number Windward/Leeward Medium671.10.8941
Triple Number Windward/Leeward High593.21.0114
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.2756.9632.1566.1530.7500.1445.2
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance597.3
Triple Number Coastal/Long Distance Low704.1
Triple Number Coastal/Long Distance Medium546.0
Triple Number Coastal/Long Distance High487.9
Triple Number Windward/Leeward Low906.9
Triple Number Windward/Leeward Medium671.1
Triple Number Windward/Leeward High593.2
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.2756.9632.1566.1530.7500.1445.2
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance597.31.0046
Triple Number Coastal/Long Distance Low704.10.8521
Triple Number Coastal/Long Distance Medium546.01.0990
Triple Number Coastal/Long Distance High487.91.2298
Triple Number Windward/Leeward Low906.90.6616
Triple Number Windward/Leeward Medium671.10.8941
Triple Number Windward/Leeward High593.21.0114
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.2756.9632.1566.1530.7500.1445.2
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating (Coastal/Long Distance)597.31.0046
Triple Number Coastal/Long Distance Low704.10.8521
Triple Number Coastal/Long Distance Medium546.01.0990
Triple Number Coastal/Long Distance High487.91.2298
Triple Number Windward/Leeward Low906.90.6616
Triple Number Windward/Leeward Medium671.10.8941
Triple Number Windward/Leeward High593.21.0114
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.2756.9632.1566.1530.7500.1445.2
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low704.10.8521
Triple Number Coastal/Long Distance Medium546.01.0990
Triple Number Coastal/Long Distance High487.91.2298
Triple Number Windward/Leeward Low906.90.6616
Triple Number Windward/Leeward Medium671.10.8941
Triple Number Windward/Leeward High593.21.0114
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8521
Triple Number Coastal/Long Distance Medium1.0990
Triple Number Coastal/Long Distance High1.2298
Triple Number Windward/Leeward Low0.6616
Triple Number Windward/Leeward Medium0.8941
Triple Number Windward/Leeward High1.0114
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.2756.9632.1566.1530.7500.1445.2
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance597.31.0046
Triple Number Coastal/Long Distance Low704.10.8521
Triple Number Coastal/Long Distance Medium546.01.0990
Triple Number Coastal/Long Distance High487.91.2298
Triple Number Windward/Leeward Low906.90.6616
Triple Number Windward/Leeward Medium671.10.8941
Triple Number Windward/Leeward High593.21.0114
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.2756.9632.1566.1530.7500.1445.2
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low704.10.8521
Triple Number Coastal/Long Distance Medium546.01.0990
Triple Number Coastal/Long Distance High487.91.2298
Triple Number Windward/Leeward Low906.90.6616
Triple Number Windward/Leeward Medium671.10.8941
Triple Number Windward/Leeward High593.21.0114
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance597.31.0046
Triple Number Coastal/Long Distance Low704.10.8521
Triple Number Coastal/Long Distance Medium546.01.0990
Triple Number Coastal/Long Distance High487.91.2298
Triple Number Windward/Leeward Low906.90.6616
Triple Number Windward/Leeward Medium671.10.8941
Triple Number Windward/Leeward High593.21.0114
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.2756.9632.1566.1530.7500.1445.2
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Triple Number Windward/Leeward Low906.90.6616
Triple Number Windward/Leeward Medium671.10.8941
Triple Number Windward/Leeward High593.21.0114
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.2756.9632.1566.1530.7500.1445.2
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low704.1
Triple Number Coastal/Long Distance Medium546.0
Triple Number Coastal/Long Distance High487.9
Triple Number Windward/Leeward Low906.9
Triple Number Windward/Leeward Medium671.1
Triple Number Windward/Leeward High593.2
Predominantly Upwind597.1
Predominantly Downwind552.5
Predominantly Reaching531.2
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance597.31.0046
Triple Number Coastal/Long Distance Low704.10.8521
Triple Number Coastal/Long Distance Medium546.01.0990
Triple Number Coastal/Long Distance High487.91.2298
Triple Number Windward/Leeward Low906.90.6616
Triple Number Windward/Leeward Medium671.10.8941
Triple Number Windward/Leeward High593.21.0114
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.2756.9632.1566.1530.7500.1445.2
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8521
Triple Number Coastal/Long Distance Medium1.0990
Triple Number Coastal/Long Distance High1.2298
Triple Number Windward/Leeward Low0.6616
Triple Number Windward/Leeward Medium0.8941
Triple Number Windward/Leeward High1.0114
Coastal/Long Distance1.0046
Predominantly Upwind1.0049
Predominantly Downwind1.0859
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.8521
Tretall Distanseseilas Mellomvind1.0990
Tretall Distanseseilas Mye vind1.2298
Tretall Pølsebane Lite vind0.6616
Tretall Pølsebane Mellomvind0.8941
Tretall Pølsebane Mye vind1.0114
Distanseseilas ett tall (OSN 8-16kn)1.0046
Distanseseilas ett tall (APH 6-20kn)1.0920
Enkeltall Motvind1.0049
Enkeltall Medvind1.0859
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low704.10.8521
Triple Number Coastal/Long Distance Medium546.01.0990
Triple Number Coastal/Long Distance High487.91.2298
Triple Number Windward/Leeward Low906.90.6616
Triple Number Windward/Leeward Medium671.10.8941
Triple Number Windward/Leeward High593.21.0114
Coastal/Long Distance597.31.0046
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind597.11.0049
Predominantly Downwind552.51.0859
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore575.01.0434
Cape Doctor Coastal474.01.2657
Triple Number Coastal/Long Distance Low704.10.8521
Triple Number Coastal/Long Distance Medium546.01.0990
Triple Number Coastal/Long Distance High487.91.2298
Triple Number Windward/Leeward Low906.90.6616
Triple Number Windward/Leeward Medium671.10.8941
Triple Number Windward/Leeward High593.21.0114
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8521
Triple Number Coastal/Long Distance Medium1.0990
Triple Number Coastal/Long Distance High1.2298
Triple Number Windward/Leeward Low0.6616
Triple Number Windward/Leeward Medium0.8941
Triple Number Windward/Leeward High1.0114
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8521
Triple Number Coastal/Long Distance Medium1.0990
Triple Number Coastal/Long Distance High1.2298
Triple Number Windward/Leeward Low0.6616
Triple Number Windward/Leeward Medium0.8941
Triple Number Windward/Leeward High1.0114
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance597.31.0046
Triple Number Coastal/Long Distance Low704.10.8521
Triple Number Coastal/Long Distance Medium546.01.0990
Triple Number Coastal/Long Distance High487.91.2298
Triple Number Windward/Leeward Low906.90.6616
Triple Number Windward/Leeward Medium671.10.8941
Triple Number Windward/Leeward High593.21.0114
Predominantly Upwind597.11.0049
Predominantly Downwind552.51.0859
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.2756.9632.1566.1530.7500.1445.2
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance597.31.0046
Triple Number Coastal/Long Distance Low704.10.8521
Triple Number Coastal/Long Distance Medium546.01.0990
Triple Number Coastal/Long Distance High487.91.2298
Triple Number Windward/Leeward Low906.90.6616
Triple Number Windward/Leeward Medium671.10.8941
Triple Number Windward/Leeward High593.21.0114
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.2756.9632.1566.1530.7500.1445.2
Custom scoring options for United States of America
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low704.10.8521
Triple Number All Purpose Medium546.01.0990
Triple Number All Purpose High487.91.2298
Triple Number Windward/Leeward Low906.90.6616
Triple Number Windward/Leeward Medium671.10.8941
Triple Number Windward/Leeward High593.21.0114
Predominantly Upwind597.11.0049
Predominantly Downwind552.51.0859
Predominantly Upwind Low792.30.7573
Predominantly Upwind Medium617.90.9710
Predominantly Upwind High578.01.0380
Predominantly Downwind Low759.30.7902
Predominantly Downwind Medium548.11.0947
Predominantly Downwind High456.01.3159
Chicago-Mac Upwind0.9874
Chicago-Mac All Purpose1.0235
Chicago-Mac Downwind1.0679
Bayview-Mac Cove Island0.9488
Bayview-Mac Shore0.9549
Harvest Moon Regatta475.21.2625
Scoring OptionTime On
Distance		Time On
Time
San Francisco Bay Heavy574.41.0446
San Francisco Bay Medium660.90.9078
Predominantly Reaching520.41.1530
Predominantly Reaching Low634.00.9464
Predominantly Reaching Medium515.61.1638
Predominantly Reaching High448.61.3374
Windward/Leeward 60-40 Low916.40.6547
Windward/Leeward 60-40 Medium693.00.8658
Windward/Leeward 60-40 High626.60.9575
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low993.20.6041
5-Band Low / Medium826.90.7256
5-Band Medium661.00.9077
5-Band Medium / High603.70.9939
5-Band High569.91.0529
ORC Ref  04560002S9RIssued on 11/09/2023Valid until 19/02/2024
VPP ver: 2023 1.03 | © ORC | www.orc.org

International
Certificate
2023

Boat

FEATHER

USA 23

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassJ 100Measurement30/07/2023HINPlan reviewHull constructionCoredCarbon RudderNoLight stanchionsNoTrim tabNo
LOA10.062Max. Beam2.810Draft1.751Displacement3,093Wetted area18.96IMS L9.444LSM09.151Acc. length9.133Sink (kg/mm) 14.24
VCGD-0.053VCGM-0.051RM Rated (kg·m) 60.2Limit of positive stability(°) 114.0Stability Index114.7
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.405PBW0.107PIPA0.0030
EDL1.270ST10.052ST20.168
ST30.177ST40.094ST50.280
RIG
Forestay tensionAftInner stayNone FittedCarbon mastYesHeadsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoRunners/Checkstays0Spreaders2Rotating mastNo
P11.579IG11.631ISP13.151MDT10.111MDL10.175MDT20.088MDL20.126TL1.335MW0.175GO0.207
E4.117J3.508BAS1.386FSD0.024SFJ0.410SPL0.000WPLTPS4.877BD0.128MWT0.00MCG0.000
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodBoom incliningFlotation Date13/08/2023MeasurerComment
SFFP0.460FFM1.032FF1.032LCFcl5.549SG1.0240
SAFP9.630FAM0.737FA0.738LCFsh5.725HBI0.853
W156.0W256.0W356.0W456.0LCFD4.883
PD1292.5PD2292.3PD3287.4PD4292.8
WD3.937PLM9000.00GSA1.0RSA1.0RM59.6
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
TANKSIdDescriptionSp.WghtCapacityConditionLCGVCG1FuelFuel3846.890.00Total deductible36.890.00
Total deductible
ORC Ref  04560002S9RIssued on 11/09/2023Valid until 19/02/2024
VPP ver: 2023 1.03 | © ORC | www.orc.org

International
Certificate
2023

Boat

FEATHER

USA 23

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentM-220.140.851.552.653.4428.2818/05/2023M10.140.861.562.663.4128.2606/08/2021
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentM/H remeas0.080.550.961.852.753.6511.45YesNo 21.2618/05/2023M/H Remeasure
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateCommentA2-2315.3012.5513.937.807.01111%88.6819/03/2023181074Asym14.8411.6513.258.027.55106%87.4815/02/2022
ORC Ref  04560002S9RIssued on 11/09/2023Valid until 19/02/2024
VPP ver: 2023 1.03 | © ORC | www.orc.org