Club
Certificate
2023

Boat

Arabesque

USA 31550

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 Angles41.7°39.6°37.6°36.9°36.4°36.0°36.4°
Beat VMG3.534.194.564.714.794.844.86
52°5.286.016.336.476.546.596.63
60°5.516.156.456.606.686.736.79
75°5.626.236.546.746.886.977.07
90°5.496.196.546.786.987.157.38
110°5.246.186.626.937.187.397.69
120°5.106.076.576.917.227.538.09
135°4.645.686.336.717.047.398.23
150°3.954.985.846.386.737.047.72
Run VMG3.424.315.085.716.236.607.19
Gybe Angles146.0°150.5°154.1°162.8°175.4°179.0°179.0°

APH: 602.4

CDL: 7.678

GPH: 668.7

CertNo: US7189

BOAT
ClassCHANCE 31.5DesignerChanceBuilderLathropAge date01/1982Series date01/1982Offset fileCHANCE315+.OFFData fileUSA31550
HULL
Length Overall9.634 mMaximum Beam2.982 mDraft1.846 mDisplacement3,332 kgDLR8.7431IMS DivisionPerformanceDynamic Allowance0.010%Age Allowance0.487%
PROPELLER
InstallationShaft exposedTypeFolding 2 bladesDiameter0.372m
CREW
Maximum weight600 kgMinimum weight450 kg * when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail22.6423.02Headsail Luffed36.7636.76Headsail FlyingSymmetric69.8869.88Asymmetric
STORM SAIL AREAS (m²)
Trysail6.63Storm Jib7.68Heavy Weather Jib20.73
SAIL LIMITS
Headsails5  Spinnakers4
STABILITY
Righting Moment59.6 kg·mStability Index121.0
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  04560002LVJIssued on 16/05/2023Valid until 19/02/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
2023

Boat

Arabesque

USA 31550

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 VMG1021.0859.2788.6764.0751.7743.8740.6
52°681.2598.7568.5556.3550.2546.5542.9
60°652.9585.2558.5545.1538.7534.6529.9
75°640.4577.4550.8534.0523.2516.6508.9
90°655.4581.5550.4531.2516.1503.7487.9
110°686.9582.9543.6519.7501.4487.4467.9
120°706.1593.0547.8520.7498.3478.1444.8
135°776.3634.2569.1536.5511.3487.4437.4
150°912.4722.8616.7564.0534.8511.5466.4
Run VMG1053.6834.4708.3630.2577.9545.5500.8
Selected Courses
Windward / Leeward1037.3846.8748.5697.1664.8644.7620.7
All purpose806.5677.4617.0586.0566.5552.3531.6
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward723.80.8289
All purpose602.40.9961
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low742.00.8086
Triple Number Coastal/Long Distance Medium599.01.0016
Triple Number Coastal/Long Distance High548.11.0947
Triple Number Windward/Leeward Low942.10.6369
Triple Number Windward/Leeward Medium718.60.8349
Triple Number Windward/Leeward High640.70.9365
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance650.60.9222
Triple Number Coastal/Long Distance Low742.00.8086
Triple Number Coastal/Long Distance Medium599.01.0016
Triple Number Coastal/Long Distance High548.11.0947
Triple Number Windward/Leeward Low942.10.6369
Triple Number Windward/Leeward Medium718.60.8349
Triple Number Windward/Leeward High640.70.9365
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1038.9801.6684.4621.3586.4558.1512.1
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7409
Downwind "popa"0.8658
70% up, 30% down "Ilhabela"0.7744
30% up, 70% down "Ilhabela-inverso"0.8241
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low742.00.8086
Triple Number Coastal/Long Distance Medium599.01.0016
Triple Number Coastal/Long Distance High548.11.0947
Triple Number Windward/Leeward Low942.10.6369
Triple Number Windward/Leeward Medium718.60.8349
Triple Number Windward/Leeward High640.70.9365
Predominantly Upwind644.10.9315
Predominantly Downwind611.80.9808
Custom scoring options for Canada
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low742.00.8086
Triple Number All Purpose Medium599.01.0016
Triple Number All Purpose High548.11.0947
Triple Number Windward/Leeward Low942.10.6369
Triple Number Windward/Leeward Medium718.60.8349
Triple Number Windward/Leeward High640.70.9365
Predominantly Upwind644.10.9315
Predominantly Downwind611.80.9808
Predominantly Upwind Low807.80.7427
Predominantly Upwind Medium662.70.9054
Predominantly Upwind High632.80.9482
Predominantly Downwind Low819.00.7326
Predominantly Downwind Medium608.60.9859
Predominantly Downwind High518.41.1575
Chicago-Mac Upwind0.9176
Chicago-Mac All Purpose0.9387
Chicago-Mac Downwind0.9653
Bayview-Mac Cove Island0.8851
Bayview-Mac Shore0.8931
Scoring OptionTime On
Distance		Time On
Time
Predominantly Reaching577.51.0389
Predominantly Reaching Low680.10.8822
Predominantly Reaching Medium573.11.0470
Predominantly Reaching High517.61.1591
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low1022.70.5867
5-Band Low / Medium867.70.6915
5-Band Medium708.30.8471
5-Band Medium / High648.40.9253
5-Band High624.90.9602
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance650.60.9222
Triple Number Coastal/Long Distance Low742.00.8086
Triple Number Coastal/Long Distance Medium599.01.0016
Triple Number Coastal/Long Distance High548.11.0947
Triple Number Windward/Leeward Low942.10.6369
Triple Number Windward/Leeward Medium718.60.8349
Triple Number Windward/Leeward High640.70.9365
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1038.9801.6684.4621.3586.4558.1512.1
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance650.60.9222
Triple Number Coastal/Long Distance Low742.00.8086
Triple Number Coastal/Long Distance Medium599.01.0016
Triple Number Coastal/Long Distance High548.11.0947
Triple Number Windward/Leeward Low942.10.6369
Triple Number Windward/Leeward Medium718.60.8349
Triple Number Windward/Leeward High640.70.9365
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1038.9801.6684.4621.3586.4558.1512.1
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance650.6
Triple Number Coastal/Long Distance Low742.0
Triple Number Coastal/Long Distance Medium599.0
Triple Number Coastal/Long Distance High548.1
Triple Number Windward/Leeward Low942.1
Triple Number Windward/Leeward Medium718.6
Triple Number Windward/Leeward High640.7
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1038.9801.6684.4621.3586.4558.1512.1
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance650.60.9222
Triple Number Coastal/Long Distance Low742.00.8086
Triple Number Coastal/Long Distance Medium599.01.0016
Triple Number Coastal/Long Distance High548.11.0947
Triple Number Windward/Leeward Low942.10.6369
Triple Number Windward/Leeward Medium718.60.8349
Triple Number Windward/Leeward High640.70.9365
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1038.9801.6684.4621.3586.4558.1512.1
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating (Coastal/Long Distance)650.60.9222
Triple Number Coastal/Long Distance Low742.00.8086
Triple Number Coastal/Long Distance Medium599.01.0016
Triple Number Coastal/Long Distance High548.11.0947
Triple Number Windward/Leeward Low942.10.6369
Triple Number Windward/Leeward Medium718.60.8349
Triple Number Windward/Leeward High640.70.9365
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1038.9801.6684.4621.3586.4558.1512.1
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low742.00.8086
Triple Number Coastal/Long Distance Medium599.01.0016
Triple Number Coastal/Long Distance High548.11.0947
Triple Number Windward/Leeward Low942.10.6369
Triple Number Windward/Leeward Medium718.60.8349
Triple Number Windward/Leeward High640.70.9365
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8086
Triple Number Coastal/Long Distance Medium1.0016
Triple Number Coastal/Long Distance High1.0947
Triple Number Windward/Leeward Low0.6369
Triple Number Windward/Leeward Medium0.8349
Triple Number Windward/Leeward High0.9365
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1038.9801.6684.4621.3586.4558.1512.1
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance650.60.9222
Triple Number Coastal/Long Distance Low742.00.8086
Triple Number Coastal/Long Distance Medium599.01.0016
Triple Number Coastal/Long Distance High548.11.0947
Triple Number Windward/Leeward Low942.10.6369
Triple Number Windward/Leeward Medium718.60.8349
Triple Number Windward/Leeward High640.70.9365
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1038.9801.6684.4621.3586.4558.1512.1
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low742.00.8086
Triple Number Coastal/Long Distance Medium599.01.0016
Triple Number Coastal/Long Distance High548.11.0947
Triple Number Windward/Leeward Low942.10.6369
Triple Number Windward/Leeward Medium718.60.8349
Triple Number Windward/Leeward High640.70.9365
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance650.60.9222
Triple Number Coastal/Long Distance Low742.00.8086
Triple Number Coastal/Long Distance Medium599.01.0016
Triple Number Coastal/Long Distance High548.11.0947
Triple Number Windward/Leeward Low942.10.6369
Triple Number Windward/Leeward Medium718.60.8349
Triple Number Windward/Leeward High640.70.9365
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1038.9801.6684.4621.3586.4558.1512.1
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Triple Number Windward/Leeward Low942.10.6369
Triple Number Windward/Leeward Medium718.60.8349
Triple Number Windward/Leeward High640.70.9365
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1038.9801.6684.4621.3586.4558.1512.1
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low742.0
Triple Number Coastal/Long Distance Medium599.0
Triple Number Coastal/Long Distance High548.1
Triple Number Windward/Leeward Low942.1
Triple Number Windward/Leeward Medium718.6
Triple Number Windward/Leeward High640.7
Predominantly Upwind644.1
Predominantly Downwind611.8
Predominantly Reaching589.8
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance650.60.9222
Triple Number Coastal/Long Distance Low742.00.8086
Triple Number Coastal/Long Distance Medium599.01.0016
Triple Number Coastal/Long Distance High548.11.0947
Triple Number Windward/Leeward Low942.10.6369
Triple Number Windward/Leeward Medium718.60.8349
Triple Number Windward/Leeward High640.70.9365
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1038.9801.6684.4621.3586.4558.1512.1
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8086
Triple Number Coastal/Long Distance Medium1.0016
Triple Number Coastal/Long Distance High1.0947
Triple Number Windward/Leeward Low0.6369
Triple Number Windward/Leeward Medium0.8349
Triple Number Windward/Leeward High0.9365
Coastal/Long Distance0.9222
Predominantly Upwind0.9315
Predominantly Downwind0.9808
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.8086
Tretall Distanseseilas Mellomvind1.0016
Tretall Distanseseilas Mye vind1.0947
Tretall Pølsebane Lite vind0.6369
Tretall Pølsebane Mellomvind0.8349
Tretall Pølsebane Mye vind0.9365
Distanseseilas ett tall (OSN 8-16kn)0.9222
Distanseseilas ett tall (APH 6-20kn)0.9961
Enkeltall Motvind0.9315
Enkeltall Medvind0.9808
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low742.00.8086
Triple Number Coastal/Long Distance Medium599.01.0016
Triple Number Coastal/Long Distance High548.11.0947
Triple Number Windward/Leeward Low942.10.6369
Triple Number Windward/Leeward Medium718.60.8349
Triple Number Windward/Leeward High640.70.9365
Coastal/Long Distance650.60.9222
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind644.10.9315
Predominantly Downwind611.80.9808
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore627.90.9556
Cape Doctor Coastal537.81.1157
Triple Number Coastal/Long Distance Low742.00.8086
Triple Number Coastal/Long Distance Medium599.01.0016
Triple Number Coastal/Long Distance High548.11.0947
Triple Number Windward/Leeward Low942.10.6369
Triple Number Windward/Leeward Medium718.60.8349
Triple Number Windward/Leeward High640.70.9365
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8086
Triple Number Coastal/Long Distance Medium1.0016
Triple Number Coastal/Long Distance High1.0947
Triple Number Windward/Leeward Low0.6369
Triple Number Windward/Leeward Medium0.8349
Triple Number Windward/Leeward High0.9365
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8086
Triple Number Coastal/Long Distance Medium1.0016
Triple Number Coastal/Long Distance High1.0947
Triple Number Windward/Leeward Low0.6369
Triple Number Windward/Leeward Medium0.8349
Triple Number Windward/Leeward High0.9365
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance650.60.9222
Triple Number Coastal/Long Distance Low742.00.8086
Triple Number Coastal/Long Distance Medium599.01.0016
Triple Number Coastal/Long Distance High548.11.0947
Triple Number Windward/Leeward Low942.10.6369
Triple Number Windward/Leeward Medium718.60.8349
Triple Number Windward/Leeward High640.70.9365
Predominantly Upwind644.10.9315
Predominantly Downwind611.80.9808
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1038.9801.6684.4621.3586.4558.1512.1
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance650.60.9222
Triple Number Coastal/Long Distance Low742.00.8086
Triple Number Coastal/Long Distance Medium599.01.0016
Triple Number Coastal/Long Distance High548.11.0947
Triple Number Windward/Leeward Low942.10.6369
Triple Number Windward/Leeward Medium718.60.8349
Triple Number Windward/Leeward High640.70.9365
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1038.9801.6684.4621.3586.4558.1512.1
Custom scoring options for United States of America
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low742.00.8086
Triple Number All Purpose Medium599.01.0016
Triple Number All Purpose High548.11.0947
Triple Number Windward/Leeward Low942.10.6369
Triple Number Windward/Leeward Medium718.60.8349
Triple Number Windward/Leeward High640.70.9365
Predominantly Upwind644.10.9315
Predominantly Downwind611.80.9808
Predominantly Upwind Low807.80.7427
Predominantly Upwind Medium662.70.9054
Predominantly Upwind High632.80.9482
Predominantly Downwind Low819.00.7326
Predominantly Downwind Medium608.60.9859
Predominantly Downwind High518.41.1575
Chicago-Mac Upwind0.9176
Chicago-Mac All Purpose0.9387
Chicago-Mac Downwind0.9653
Bayview-Mac Cove Island0.8851
Bayview-Mac Shore0.8931
Harvest Moon Regatta535.21.1210
Scoring OptionTime On
Distance		Time On
Time
San Francisco Bay Heavy630.60.9514
San Francisco Bay Medium712.10.8426
Predominantly Reaching577.51.0389
Predominantly Reaching Low680.10.8822
Predominantly Reaching Medium573.11.0470
Predominantly Reaching High517.61.1591
Windward/Leeward 60-40 Low941.70.6372
Windward/Leeward 60-40 Medium738.50.8124
Windward/Leeward 60-40 High676.00.8875
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low1022.70.5867
5-Band Low / Medium867.70.6915
5-Band Medium708.30.8471
5-Band Medium / High648.40.9253
5-Band High624.90.9602
ORC Ref  04560002LVJIssued on 16/05/2023Valid until 19/02/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
2023

Boat

Arabesque

USA 31550

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassCHANCE 31.5Measurement26/04/2023HINPlan reviewHull constructionCoredCarbon RudderNoLight stanchionsNoTrim tabNo
LOA9.634Max. Beam2.982Draft1.846Displacement3,332Wetted area16.72IMS L7.717LSM07.250Acc. length9.634Sink (kg/mm) 12.16
VCGD-0.100VCGM-0.020RM Rated (kg·m) 59.6Limit of positive stability(°) 122.2Stability Index121.0
PROPELLER
Propeller TypeFolding 2 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.372PBW0.092PIPA0.0037
PSD0.025PHD0.053PHL0.139
PSA24.0°ESL0.650
ST10.023ST20.099ST30.099
ST40.041ST50.141
RIG
Forestay tensionAftInner stayNone FittedCarbon mastNoHeadsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoRunners/Checkstays2Spreaders2Rotating mastNo
P10.960IG12.300ISP12.300MDT10.090MDL10.147MDT20.087MDL20.110TL3.500MW0.110GO0.138
E3.454J3.820BAS1.225FSD0.034SFJSPL3.820WPLTPS3.820BD0.116MWT82.10MCG3.962
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodPoles incliningFlotation Date26/04/2023MeasurerComment
SFFP0.500FFM1.136FF1.141LCFcl5.106SG1.0100
SAFP8.460FAM0.968FA0.976LCFsh5.316HBI0.992
W132.7W232.7W332.7W432.7
PD1493.1PD2493.1PD3493.1PD4493.1
WD11.440PLM9000.00GSA1.0RSA1.0RM59.7
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
TANKSIdDescriptionSp.WghtCapacityConditionLCGVCG1Stbd fuelFuel30306.17-0.10Total deductible256.17-0.10
Total deductible
ORC Ref  04560002LVJIssued on 16/05/2023Valid until 19/02/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org

Club
Certificate
2023

Boat

Arabesque

USA 31550

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentMain 230.130.761.312.242.9022.6420/03/2023
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentL/M Genoa0.060.751.472.914.385.9112.52NoNo 36.7620/03/2023
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateComment112.2112.2112.216.876.8669.88
ORC Ref  04560002LVJIssued on 16/05/2023Valid until 19/02/2024
VPP ver: 2023 1.02 | © ORC | www.orc.org