International
One Design
 Certificate
2023

Boat

SCOTCH BONNET

USA 52

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 Angles43.2°41.1°39.0°38.2°38.2°38.7°39.3°
Beat VMG3.424.144.584.724.774.794.78
52°5.246.106.556.776.906.977.04
60°5.536.306.817.127.297.407.52
75°5.726.457.047.637.968.198.49
90°5.716.557.047.768.549.029.63
110°5.826.777.648.218.749.2510.99
120°5.686.677.628.629.329.9911.33
135°5.096.237.088.079.2810.7213.18
150°4.305.446.287.057.938.9812.44
Run VMG3.724.715.446.116.877.7810.78
Gybe Angles143.3°147.8°149.6°148.3°145.6°144.7°142.6°

APH: 553.4

CDL: 7.451

GPH: 621.6

CertNo: USA 52

BOAT
ClassMELGES 24 ODDesignerREICHEL/PUGHBuilderROWENAge date11/1999Series date12/1992Offset filemelg24.ODData fileUSA52M24
HULL
Length Overall7.509 mMaximum Beam2.490 mDraft1.525 mDisplacement821 kgDLR2.7391IMS DivisionSportboatDynamic Allowance0.000%Age Allowance0.487%
PROPELLER
InstallationNo PropellerTypeN/ADiameterN/A
CREW
Maximum weight375 kgMinimum weight281 kg * when appliedNon Manual PowerNoCrew Arm ExtensionLoose or no lifelines
SAIL AREAS (m²)
MeasuredRatedMainsail21.3822.33Headsail Luffed12.1312.13Headsail FlyingSymmetricAsymmetric56.1856.18 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail5.87Storm Jib3.72Heavy Weather Jib10.04
SAIL LIMITS
Headsails5  Spinnakers4
STABILITY
Righting Moment25.1 kg·mStability Index95.8
COMMENTS
LIFELINE TENSION ACC CLASSRULE
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  03330002M5TIssued on 19/05/2023Valid until 31/12/2023
VPP ver: 2023 1.02 | © ORC | www.orc.org

International
One Design
 Certificate
2023

Boat

SCOTCH BONNET

USA 52

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 VMG1053.7869.8785.5763.0754.8752.1752.9
52°686.8590.4549.5531.7522.0516.2511.3
60°650.5571.5528.9505.6493.8486.2478.9
75°629.6558.3511.5471.7452.4439.6424.3
90°631.0549.4511.7463.7421.6399.0374.0
110°619.0531.4471.1438.7412.0389.0327.4
120°634.1539.5472.2417.6386.1360.4317.7
135°707.8578.1508.7446.2388.1335.9273.1
150°838.1661.7573.3510.6453.7400.9289.3
Run VMG967.7764.1662.0589.5523.9462.9334.1
Selected Courses
Windward / Leeward1010.7816.9723.8676.3639.3607.5543.5
All purpose777.8647.2580.4539.1508.0483.3440.0
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward695.70.8625
All purpose553.41.0843
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low712.50.8421
Triple Number Coastal/Long Distance Medium554.11.0828
Triple Number Coastal/Long Distance High473.21.2679
Triple Number Windward/Leeward Low913.80.6566
Triple Number Windward/Leeward Medium694.60.8638
Triple Number Windward/Leeward High591.41.0145
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance603.30.9945
Triple Number Coastal/Long Distance Low712.50.8421
Triple Number Coastal/Long Distance Medium554.11.0828
Triple Number Coastal/Long Distance High473.21.2679
Triple Number Windward/Leeward Low913.80.6566
Triple Number Windward/Leeward Medium694.60.8638
Triple Number Windward/Leeward High591.41.0145
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1006.4769.7652.8578.8528.9486.0411.6
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7328
Downwind "popa"0.9758
70% up, 30% down "Ilhabela"0.7919
30% up, 70% down "Ilhabela-inverso"0.8875
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low712.50.8421
Triple Number Coastal/Long Distance Medium554.11.0828
Triple Number Coastal/Long Distance High473.21.2679
Triple Number Windward/Leeward Low913.80.6566
Triple Number Windward/Leeward Medium694.60.8638
Triple Number Windward/Leeward High591.41.0145
Predominantly Upwind614.50.9764
Predominantly Downwind548.81.0933
Custom scoring options for Canada
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low712.50.8421
Triple Number All Purpose Medium554.11.0828
Triple Number All Purpose High473.21.2679
Triple Number Windward/Leeward Low913.80.6566
Triple Number Windward/Leeward Medium694.60.8638
Triple Number Windward/Leeward High591.41.0145
Predominantly Upwind614.50.9764
Predominantly Downwind548.81.0933
Predominantly Upwind Low800.20.7499
Predominantly Upwind Medium643.50.9324
Predominantly Upwind High604.90.9919
Predominantly Downwind Low767.60.7816
Predominantly Downwind Medium547.61.0956
Predominantly Downwind High403.71.4863
Chicago-Mac Upwind0.9594
Chicago-Mac All Purpose1.0110
Chicago-Mac Downwind1.0688
Bayview-Mac Cove Island0.9421
Bayview-Mac Shore0.9480
Scoring OptionTime On
Distance		Time On
Time
Predominantly Reaching517.71.1590
Predominantly Reaching Low645.40.9296
Predominantly Reaching Medium517.91.1586
Predominantly Reaching High419.31.4309
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low995.80.6025
5-Band Low / Medium840.30.7140
5-Band Medium683.80.8774
5-Band Medium / High607.80.9871
5-Band High554.61.0819
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance603.30.9945
Triple Number Coastal/Long Distance Low712.50.8421
Triple Number Coastal/Long Distance Medium554.11.0828
Triple Number Coastal/Long Distance High473.21.2679
Triple Number Windward/Leeward Low913.80.6566
Triple Number Windward/Leeward Medium694.60.8638
Triple Number Windward/Leeward High591.41.0145
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1006.4769.7652.8578.8528.9486.0411.6
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance603.30.9945
Triple Number Coastal/Long Distance Low712.50.8421
Triple Number Coastal/Long Distance Medium554.11.0828
Triple Number Coastal/Long Distance High473.21.2679
Triple Number Windward/Leeward Low913.80.6566
Triple Number Windward/Leeward Medium694.60.8638
Triple Number Windward/Leeward High591.41.0145
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1006.4769.7652.8578.8528.9486.0411.6
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance603.3
Triple Number Coastal/Long Distance Low712.5
Triple Number Coastal/Long Distance Medium554.1
Triple Number Coastal/Long Distance High473.2
Triple Number Windward/Leeward Low913.8
Triple Number Windward/Leeward Medium694.6
Triple Number Windward/Leeward High591.4
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1006.4769.7652.8578.8528.9486.0411.6
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance603.30.9945
Triple Number Coastal/Long Distance Low712.50.8421
Triple Number Coastal/Long Distance Medium554.11.0828
Triple Number Coastal/Long Distance High473.21.2679
Triple Number Windward/Leeward Low913.80.6566
Triple Number Windward/Leeward Medium694.60.8638
Triple Number Windward/Leeward High591.41.0145
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1006.4769.7652.8578.8528.9486.0411.6
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating (Coastal/Long Distance)603.30.9945
Triple Number Coastal/Long Distance Low712.50.8421
Triple Number Coastal/Long Distance Medium554.11.0828
Triple Number Coastal/Long Distance High473.21.2679
Triple Number Windward/Leeward Low913.80.6566
Triple Number Windward/Leeward Medium694.60.8638
Triple Number Windward/Leeward High591.41.0145
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1006.4769.7652.8578.8528.9486.0411.6
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low712.50.8421
Triple Number Coastal/Long Distance Medium554.11.0828
Triple Number Coastal/Long Distance High473.21.2679
Triple Number Windward/Leeward Low913.80.6566
Triple Number Windward/Leeward Medium694.60.8638
Triple Number Windward/Leeward High591.41.0145
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8421
Triple Number Coastal/Long Distance Medium1.0828
Triple Number Coastal/Long Distance High1.2679
Triple Number Windward/Leeward Low0.6566
Triple Number Windward/Leeward Medium0.8638
Triple Number Windward/Leeward High1.0145
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1006.4769.7652.8578.8528.9486.0411.6
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance603.30.9945
Triple Number Coastal/Long Distance Low712.50.8421
Triple Number Coastal/Long Distance Medium554.11.0828
Triple Number Coastal/Long Distance High473.21.2679
Triple Number Windward/Leeward Low913.80.6566
Triple Number Windward/Leeward Medium694.60.8638
Triple Number Windward/Leeward High591.41.0145
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1006.4769.7652.8578.8528.9486.0411.6
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low712.50.8421
Triple Number Coastal/Long Distance Medium554.11.0828
Triple Number Coastal/Long Distance High473.21.2679
Triple Number Windward/Leeward Low913.80.6566
Triple Number Windward/Leeward Medium694.60.8638
Triple Number Windward/Leeward High591.41.0145
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance603.30.9945
Triple Number Coastal/Long Distance Low712.50.8421
Triple Number Coastal/Long Distance Medium554.11.0828
Triple Number Coastal/Long Distance High473.21.2679
Triple Number Windward/Leeward Low913.80.6566
Triple Number Windward/Leeward Medium694.60.8638
Triple Number Windward/Leeward High591.41.0145
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1006.4769.7652.8578.8528.9486.0411.6
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Triple Number Windward/Leeward Low913.80.6566
Triple Number Windward/Leeward Medium694.60.8638
Triple Number Windward/Leeward High591.41.0145
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1006.4769.7652.8578.8528.9486.0411.6
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low712.5
Triple Number Coastal/Long Distance Medium554.1
Triple Number Coastal/Long Distance High473.2
Triple Number Windward/Leeward Low913.8
Triple Number Windward/Leeward Medium694.6
Triple Number Windward/Leeward High591.4
Predominantly Upwind614.5
Predominantly Downwind548.8
Predominantly Reaching526.7
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance603.30.9945
Triple Number Coastal/Long Distance Low712.50.8421
Triple Number Coastal/Long Distance Medium554.11.0828
Triple Number Coastal/Long Distance High473.21.2679
Triple Number Windward/Leeward Low913.80.6566
Triple Number Windward/Leeward Medium694.60.8638
Triple Number Windward/Leeward High591.41.0145
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1006.4769.7652.8578.8528.9486.0411.6
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8421
Triple Number Coastal/Long Distance Medium1.0828
Triple Number Coastal/Long Distance High1.2679
Triple Number Windward/Leeward Low0.6566
Triple Number Windward/Leeward Medium0.8638
Triple Number Windward/Leeward High1.0145
Coastal/Long Distance0.9945
Predominantly Upwind0.9764
Predominantly Downwind1.0933
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.8421
Tretall Distanseseilas Mellomvind1.0828
Tretall Distanseseilas Mye vind1.2679
Tretall Pølsebane Lite vind0.6566
Tretall Pølsebane Mellomvind0.8638
Tretall Pølsebane Mye vind1.0145
Distanseseilas ett tall (OSN 8-16kn)0.9945
Distanseseilas ett tall (APH 6-20kn)1.0843
Enkeltall Motvind0.9764
Enkeltall Medvind1.0933
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low712.50.8421
Triple Number Coastal/Long Distance Medium554.11.0828
Triple Number Coastal/Long Distance High473.21.2679
Triple Number Windward/Leeward Low913.80.6566
Triple Number Windward/Leeward Medium694.60.8638
Triple Number Windward/Leeward High591.41.0145
Coastal/Long Distance603.30.9945
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind614.50.9764
Predominantly Downwind548.81.0933
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore562.71.0663
Cape Doctor Coastal453.01.3246
Triple Number Coastal/Long Distance Low712.50.8421
Triple Number Coastal/Long Distance Medium554.11.0828
Triple Number Coastal/Long Distance High473.21.2679
Triple Number Windward/Leeward Low913.80.6566
Triple Number Windward/Leeward Medium694.60.8638
Triple Number Windward/Leeward High591.41.0145
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8421
Triple Number Coastal/Long Distance Medium1.0828
Triple Number Coastal/Long Distance High1.2679
Triple Number Windward/Leeward Low0.6566
Triple Number Windward/Leeward Medium0.8638
Triple Number Windward/Leeward High1.0145
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8421
Triple Number Coastal/Long Distance Medium1.0828
Triple Number Coastal/Long Distance High1.2679
Triple Number Windward/Leeward Low0.6566
Triple Number Windward/Leeward Medium0.8638
Triple Number Windward/Leeward High1.0145
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance603.30.9945
Triple Number Coastal/Long Distance Low712.50.8421
Triple Number Coastal/Long Distance Medium554.11.0828
Triple Number Coastal/Long Distance High473.21.2679
Triple Number Windward/Leeward Low913.80.6566
Triple Number Windward/Leeward Medium694.60.8638
Triple Number Windward/Leeward High591.41.0145
Predominantly Upwind614.50.9764
Predominantly Downwind548.81.0933
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1006.4769.7652.8578.8528.9486.0411.6
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance603.30.9945
Triple Number Coastal/Long Distance Low712.50.8421
Triple Number Coastal/Long Distance Medium554.11.0828
Triple Number Coastal/Long Distance High473.21.2679
Triple Number Windward/Leeward Low913.80.6566
Triple Number Windward/Leeward Medium694.60.8638
Triple Number Windward/Leeward High591.41.0145
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1006.4769.7652.8578.8528.9486.0411.6
Custom scoring options for United States of America
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low712.50.8421
Triple Number All Purpose Medium554.11.0828
Triple Number All Purpose High473.21.2679
Triple Number Windward/Leeward Low913.80.6566
Triple Number Windward/Leeward Medium694.60.8638
Triple Number Windward/Leeward High591.41.0145
Predominantly Upwind614.50.9764
Predominantly Downwind548.81.0933
Predominantly Upwind Low800.20.7499
Predominantly Upwind Medium643.50.9324
Predominantly Upwind High604.90.9919
Predominantly Downwind Low767.60.7816
Predominantly Downwind Medium547.61.0956
Predominantly Downwind High403.71.4863
Chicago-Mac Upwind0.9594
Chicago-Mac All Purpose1.0110
Chicago-Mac Downwind1.0688
Bayview-Mac Cove Island0.9421
Bayview-Mac Shore0.9480
Harvest Moon Regatta450.01.3334
Scoring OptionTime On
Distance		Time On
Time
San Francisco Bay Heavy576.51.0408
San Francisco Bay Medium678.20.8847
Predominantly Reaching517.71.1590
Predominantly Reaching Low645.40.9296
Predominantly Reaching Medium517.91.1586
Predominantly Reaching High419.31.4309
Windward/Leeward 60-40 Low923.40.6498
Windward/Leeward 60-40 Medium722.70.8302
Windward/Leeward 60-40 High646.40.9282
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low995.80.6025
5-Band Low / Medium840.30.7140
5-Band Medium683.80.8774
5-Band Medium / High607.80.9871
5-Band High554.61.0819
ORC Ref  03330002M5TIssued on 19/05/2023Valid until 31/12/2023
VPP ver: 2023 1.02 | © ORC | www.orc.org

International
One Design
 Certificate
2023

Boat

SCOTCH BONNET

USA 52

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassMELGES 24 ODMeasurement19/03/1996HINPlan reviewHull constructionCoredCarbon RudderNoLight stanchionsNoTrim tabNo
LOA7.509Max. Beam2.490Draft1.525Displacement821Wetted area10.31IMS L7.241LSM06.692Acc. length7.509Sink (kg/mm) 8.78
VCGD0.040VCGM0.020RM Rated (kg·m) 25.1Limit of positive stability(°) 104.3Stability Index95.8
PROPELLER
Propeller TypeNo Propeller
Hydro generatorNo
PIPA0.0000
RIG
Forestay tensionAftInner stayNone FittedCarbon mastYesHeadsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoRunners/Checkstays0Spreaders1Rotating mastNo
P8.818IG8.620ISP9.777MDT10.076MDL10.120MDT20.062MDL20.075TL1.578MW0.114GO0.114
E3.800J2.506BAS1.000FSD0.000SFJ0.200SPLWPLTPS4.106BD0.103MWT28.00MCG3.150
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodPoles incliningFlotation Date16/03/2017MeasurerComment
SFFP0.130FFM0.883FF0.883LCFcl4.135SG1.0225
SAFP7.370FAM0.599FA0.599LCFsh4.315HBI0.799
W118.5W218.5W318.5W418.5
PD1427.9PD2432.4PD3428.3PD4436.5
WD7.400PLM9000.00GSA1.0RSA1.0RM25.0
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
OTHER ITEMSIdKindDescriptionWeightLCGVCG1EngineMIN 12kg OUTBOARDTotal deductible
ORC Ref  03330002M5TIssued on 19/05/2023Valid until 31/12/2023
VPP ver: 2023 1.02 | © ORC | www.orc.org

International
One Design
 Certificate
2023

Boat

SCOTCH BONNET

USA 52

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentM0.180.931.682.703.3321.38CLASS RULES & MEAS
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentH0.050.400.761.422.092.788.56NoNo 12.13CLASS RULES
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateCommentA11.5911.0811.345.866.3093%56.18CLASS RULES & MEAS
ORC Ref  03330002M5TIssued on 19/05/2023Valid until 31/12/2023
VPP ver: 2023 1.02 | © ORC | www.orc.org