Club
Certificate
2023

Boat

ISLA

USA61148

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 Angles44.2°42.3°40.8°40.5°40.0°39.6°39.4°
Beat VMG3.744.595.215.575.765.865.94
52°5.816.937.698.128.338.448.54
60°6.347.427.968.378.598.708.81
75°6.857.908.428.678.839.029.24
90°6.988.048.618.959.189.359.62
110°6.627.808.518.969.319.6010.16
120°6.247.578.428.949.369.7510.35
135°5.616.967.998.639.109.5510.45
150°4.735.997.077.928.468.829.46
Run VMG4.105.196.126.867.337.678.65
Gybe Angles143.3°146.9°148.3°149.6°150.1°167.6°175.4°

APH: 490.8

CDL: 12.103

GPH: 551.2

CertNo: US6114

BOAT
ClassXC-50DesignerNiels JespersonBuilderx-yachtsAge date01/2017Series date01/2010Offset fileXc50_DV.offData fileUSA 61148
HULL
Length Overall15.000 mMaximum Beam4.542 mDraft2.355 mDisplacement16,085 kgDLR6.7455IMS DivisionCruiser/RacerDynamic Allowance0.270%Age Allowance0.422%
PROPELLER
InstallationShaft exposedTypeFolding 3 bladesDiameter0.602m
CREW
Maximum weight1,040 kgMinimum weight780 kg * when appliedNon Manual PowerSheetsCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail71.4372.51Headsail Luffed58.7558.75Headsail Flying132.09132.09SymmetricAsymmetric201.23201.23 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail21.58Storm Jib21.95Heavy Weather Jib59.27
SAIL LIMITS
Headsails7  Spinnakers5
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  04560002J2AIssued on 24/04/2023Valid until 19/02/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
2023

Boat

ISLA

USA61148

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 VMG962.1783.9691.6646.0625.4614.2605.9
52°619.3519.5468.3443.4432.3426.7421.7
60°567.8485.0452.3430.3419.3413.8408.4
75°525.4455.7427.5415.2407.7399.1389.6
90°515.8447.6418.0402.3392.0385.0374.2
110°543.6461.7423.1401.8386.9375.1354.3
120°577.1475.3427.3402.8384.6369.1347.8
135°641.8517.1450.8417.0395.6377.2344.5
150°760.3601.2509.4454.4425.5408.1380.6
Run VMG878.0694.2588.2524.7491.3469.1416.2
Selected Courses
Windward / Leeward920.0739.0639.9585.4558.3541.6511.0
All purpose694.5570.5506.4472.4453.9441.3422.8
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward614.90.9758
All purpose490.81.2224
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low632.50.9486
Triple Number Coastal/Long Distance Medium487.31.2313
Triple Number Coastal/Long Distance High437.51.3714
Triple Number Windward/Leeward Low829.50.7233
Triple Number Windward/Leeward Medium609.60.9842
Triple Number Windward/Leeward High534.31.1229
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance537.21.1169
Triple Number Coastal/Long Distance Low632.50.9486
Triple Number Coastal/Long Distance Medium487.31.2313
Triple Number Coastal/Long Distance High437.51.3714
Triple Number Windward/Leeward Low829.50.7233
Triple Number Windward/Leeward Medium609.60.9842
Triple Number Windward/Leeward High534.31.1229
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance915.8691.7574.1505.9471.3445.3404.2
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.8521
Downwind "popa"1.0341
70% up, 30% down "Ilhabela"0.8996
30% up, 70% down "Ilhabela-inverso"0.9718
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low632.50.9486
Triple Number Coastal/Long Distance Medium487.31.2313
Triple Number Coastal/Long Distance High437.51.3714
Triple Number Windward/Leeward Low829.50.7233
Triple Number Windward/Leeward Medium609.60.9842
Triple Number Windward/Leeward High534.31.1229
Predominantly Upwind532.81.1261
Predominantly Downwind498.21.2042
Custom scoring options for Canada
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low632.50.9486
Triple Number All Purpose Medium487.31.2313
Triple Number All Purpose High437.51.3714
Triple Number Windward/Leeward Low829.50.7233
Triple Number Windward/Leeward Medium609.60.9842
Triple Number Windward/Leeward High534.31.1229
Predominantly Upwind532.81.1261
Predominantly Downwind498.21.2042
Predominantly Upwind Low717.90.8357
Predominantly Upwind Medium552.01.0870
Predominantly Upwind High509.51.1776
Predominantly Downwind Low689.50.8702
Predominantly Downwind Medium493.81.2151
Predominantly Downwind High421.31.4240
Chicago-Mac Upwind1.1041
Chicago-Mac All Purpose1.1411
Chicago-Mac Downwind1.1833
Bayview-Mac Cove Island1.0613
Bayview-Mac Shore1.0687
Scoring OptionTime On
Distance		Time On
Time
Predominantly Reaching460.31.3036
Predominantly Reaching Low563.41.0650
Predominantly Reaching Medium454.91.3189
Predominantly Reaching High404.21.4843
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low906.10.6622
5-Band Low / Medium756.90.7927
5-Band Medium599.11.0015
5-Band Medium / High542.91.1051
5-Band High516.31.1620
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance537.21.1169
Triple Number Coastal/Long Distance Low632.50.9486
Triple Number Coastal/Long Distance Medium487.31.2313
Triple Number Coastal/Long Distance High437.51.3714
Triple Number Windward/Leeward Low829.50.7233
Triple Number Windward/Leeward Medium609.60.9842
Triple Number Windward/Leeward High534.31.1229
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance915.8691.7574.1505.9471.3445.3404.2
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance537.21.1169
Triple Number Coastal/Long Distance Low632.50.9486
Triple Number Coastal/Long Distance Medium487.31.2313
Triple Number Coastal/Long Distance High437.51.3714
Triple Number Windward/Leeward Low829.50.7233
Triple Number Windward/Leeward Medium609.60.9842
Triple Number Windward/Leeward High534.31.1229
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance915.8691.7574.1505.9471.3445.3404.2
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance537.2
Triple Number Coastal/Long Distance Low632.5
Triple Number Coastal/Long Distance Medium487.3
Triple Number Coastal/Long Distance High437.5
Triple Number Windward/Leeward Low829.5
Triple Number Windward/Leeward Medium609.6
Triple Number Windward/Leeward High534.3
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance915.8691.7574.1505.9471.3445.3404.2
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance537.21.1169
Triple Number Coastal/Long Distance Low632.50.9486
Triple Number Coastal/Long Distance Medium487.31.2313
Triple Number Coastal/Long Distance High437.51.3714
Triple Number Windward/Leeward Low829.50.7233
Triple Number Windward/Leeward Medium609.60.9842
Triple Number Windward/Leeward High534.31.1229
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance915.8691.7574.1505.9471.3445.3404.2
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating (Coastal/Long Distance)537.21.1169
Triple Number Coastal/Long Distance Low632.50.9486
Triple Number Coastal/Long Distance Medium487.31.2313
Triple Number Coastal/Long Distance High437.51.3714
Triple Number Windward/Leeward Low829.50.7233
Triple Number Windward/Leeward Medium609.60.9842
Triple Number Windward/Leeward High534.31.1229
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance915.8691.7574.1505.9471.3445.3404.2
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low632.50.9486
Triple Number Coastal/Long Distance Medium487.31.2313
Triple Number Coastal/Long Distance High437.51.3714
Triple Number Windward/Leeward Low829.50.7233
Triple Number Windward/Leeward Medium609.60.9842
Triple Number Windward/Leeward High534.31.1229
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9486
Triple Number Coastal/Long Distance Medium1.2313
Triple Number Coastal/Long Distance High1.3714
Triple Number Windward/Leeward Low0.7233
Triple Number Windward/Leeward Medium0.9842
Triple Number Windward/Leeward High1.1229
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance915.8691.7574.1505.9471.3445.3404.2
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance537.21.1169
Triple Number Coastal/Long Distance Low632.50.9486
Triple Number Coastal/Long Distance Medium487.31.2313
Triple Number Coastal/Long Distance High437.51.3714
Triple Number Windward/Leeward Low829.50.7233
Triple Number Windward/Leeward Medium609.60.9842
Triple Number Windward/Leeward High534.31.1229
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance915.8691.7574.1505.9471.3445.3404.2
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low632.50.9486
Triple Number Coastal/Long Distance Medium487.31.2313
Triple Number Coastal/Long Distance High437.51.3714
Triple Number Windward/Leeward Low829.50.7233
Triple Number Windward/Leeward Medium609.60.9842
Triple Number Windward/Leeward High534.31.1229
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance537.21.1169
Triple Number Coastal/Long Distance Low632.50.9486
Triple Number Coastal/Long Distance Medium487.31.2313
Triple Number Coastal/Long Distance High437.51.3714
Triple Number Windward/Leeward Low829.50.7233
Triple Number Windward/Leeward Medium609.60.9842
Triple Number Windward/Leeward High534.31.1229
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance915.8691.7574.1505.9471.3445.3404.2
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Triple Number Windward/Leeward Low829.50.7233
Triple Number Windward/Leeward Medium609.60.9842
Triple Number Windward/Leeward High534.31.1229
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance915.8691.7574.1505.9471.3445.3404.2
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low632.5
Triple Number Coastal/Long Distance Medium487.3
Triple Number Coastal/Long Distance High437.5
Triple Number Windward/Leeward Low829.5
Triple Number Windward/Leeward Medium609.6
Triple Number Windward/Leeward High534.3
Predominantly Upwind532.8
Predominantly Downwind498.2
Predominantly Reaching472.9
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance537.21.1169
Triple Number Coastal/Long Distance Low632.50.9486
Triple Number Coastal/Long Distance Medium487.31.2313
Triple Number Coastal/Long Distance High437.51.3714
Triple Number Windward/Leeward Low829.50.7233
Triple Number Windward/Leeward Medium609.60.9842
Triple Number Windward/Leeward High534.31.1229
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance915.8691.7574.1505.9471.3445.3404.2
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9486
Triple Number Coastal/Long Distance Medium1.2313
Triple Number Coastal/Long Distance High1.3714
Triple Number Windward/Leeward Low0.7233
Triple Number Windward/Leeward Medium0.9842
Triple Number Windward/Leeward High1.1229
Coastal/Long Distance1.1169
Predominantly Upwind1.1261
Predominantly Downwind1.2042
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.9486
Tretall Distanseseilas Mellomvind1.2313
Tretall Distanseseilas Mye vind1.3714
Tretall Pølsebane Lite vind0.7233
Tretall Pølsebane Mellomvind0.9842
Tretall Pølsebane Mye vind1.1229
Distanseseilas ett tall (OSN 8-16kn)1.1169
Distanseseilas ett tall (APH 6-20kn)1.2224
Enkeltall Motvind1.1261
Enkeltall Medvind1.2042
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low632.50.9486
Triple Number Coastal/Long Distance Medium487.31.2313
Triple Number Coastal/Long Distance High437.51.3714
Triple Number Windward/Leeward Low829.50.7233
Triple Number Windward/Leeward Medium609.60.9842
Triple Number Windward/Leeward High534.31.1229
Coastal/Long Distance537.21.1169
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind532.81.1261
Predominantly Downwind498.21.2042
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore520.21.1534
Cape Doctor Coastal428.31.4008
Triple Number Coastal/Long Distance Low632.50.9486
Triple Number Coastal/Long Distance Medium487.31.2313
Triple Number Coastal/Long Distance High437.51.3714
Triple Number Windward/Leeward Low829.50.7233
Triple Number Windward/Leeward Medium609.60.9842
Triple Number Windward/Leeward High534.31.1229
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9486
Triple Number Coastal/Long Distance Medium1.2313
Triple Number Coastal/Long Distance High1.3714
Triple Number Windward/Leeward Low0.7233
Triple Number Windward/Leeward Medium0.9842
Triple Number Windward/Leeward High1.1229
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.9486
Triple Number Coastal/Long Distance Medium1.2313
Triple Number Coastal/Long Distance High1.3714
Triple Number Windward/Leeward Low0.7233
Triple Number Windward/Leeward Medium0.9842
Triple Number Windward/Leeward High1.1229
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance537.21.1169
Triple Number Coastal/Long Distance Low632.50.9486
Triple Number Coastal/Long Distance Medium487.31.2313
Triple Number Coastal/Long Distance High437.51.3714
Triple Number Windward/Leeward Low829.50.7233
Triple Number Windward/Leeward Medium609.60.9842
Triple Number Windward/Leeward High534.31.1229
Predominantly Upwind532.81.1261
Predominantly Downwind498.21.2042
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance915.8691.7574.1505.9471.3445.3404.2
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance537.21.1169
Triple Number Coastal/Long Distance Low632.50.9486
Triple Number Coastal/Long Distance Medium487.31.2313
Triple Number Coastal/Long Distance High437.51.3714
Triple Number Windward/Leeward Low829.50.7233
Triple Number Windward/Leeward Medium609.60.9842
Triple Number Windward/Leeward High534.31.1229
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance915.8691.7574.1505.9471.3445.3404.2
Custom scoring options for United States of America
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low632.50.9486
Triple Number All Purpose Medium487.31.2313
Triple Number All Purpose High437.51.3714
Triple Number Windward/Leeward Low829.50.7233
Triple Number Windward/Leeward Medium609.60.9842
Triple Number Windward/Leeward High534.31.1229
Predominantly Upwind532.81.1261
Predominantly Downwind498.21.2042
Predominantly Upwind Low717.90.8357
Predominantly Upwind Medium552.01.0870
Predominantly Upwind High509.51.1776
Predominantly Downwind Low689.50.8702
Predominantly Downwind Medium493.81.2151
Predominantly Downwind High421.31.4240
Chicago-Mac Upwind1.1041
Chicago-Mac All Purpose1.1411
Chicago-Mac Downwind1.1833
Bayview-Mac Cove Island1.0613
Bayview-Mac Shore1.0687
Harvest Moon Regatta423.61.4165
Scoring OptionTime On
Distance		Time On
Time
San Francisco Bay Heavy519.61.1548
San Francisco Bay Medium601.50.9975
Predominantly Reaching460.31.3036
Predominantly Reaching Low563.41.0650
Predominantly Reaching Medium454.91.3189
Predominantly Reaching High404.21.4843
Windward/Leeward 60-40 Low838.20.7158
Windward/Leeward 60-40 Medium629.30.9534
Windward/Leeward 60-40 High561.41.0688
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low906.10.6622
5-Band Low / Medium756.90.7927
5-Band Medium599.11.0015
5-Band Medium / High542.91.1051
5-Band High516.31.1620
ORC Ref  04560002J2AIssued on 24/04/2023Valid until 19/02/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
2023

Boat

ISLA

USA61148

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassXC-50MeasurementHINPlan reviewHull constructionCoredCarbon RudderNoLight stanchionsNoTrim tabNo
LOA15.000Max. Beam4.542Draft2.355Displacement16,085Wetted area47.51IMS L13.521LSM013.358Acc. length14.761Sink (kg/mm) 36.18
VCGD0.065VCGM0.062RM Rated (kg·m) 418.6Limit of positive stability(°) N/AStability IndexN/A
PROPELLER
Propeller TypeFolding 3 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.602PBWPIPA0.0029
PSDPHDPHL
PSAESL
ST1ST2ST3
ST4ST5
RIG
Forestay tensionAftInner stayNone FittedCarbon mastNoHeadsail furlerNoMainsail furlerYesArticulated bowspritNoNon-circular riggingNoFiber riggingNoRunners/Checkstays0Spreaders2Rotating mastNo
P19.312IG20.952ISP21.404MDT10.162MDL10.302MDT2MDL2TLTaperMWGO
E6.385J5.526BAS2.082FSDSFJSPLWPLTPS6.142BDMWTMCG
Flying Headsail Foretriangles IdISPTPS121.4046.142
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date31/03/2023MeasurerComment
SFFP0.486FFMFF1.721LCFcl8.369SG
SAFP14.741FAMFA1.265LCFsh8.661HBI1.436
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  04560002J2AIssued on 24/04/2023Valid until 19/02/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
2023

Boat

ISLA

USA61148

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment10.231.262.263.975.2571.43
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentC650.052.074.087.139.2910.6020.83NoYes1132.0910.130.871.633.094.485.7219.50YesNo 58.75
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment122.6120.0021.3111.4210.99104%201.23
ORC Ref  04560002J2AIssued on 24/04/2023Valid until 19/02/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org